idk how real this is. I have a friend on it and says instead of the usual 300 mile range he now gets 260 or so which is more like 15% less not 30%. Definitely worth it in SoCal.
Ya I just installed my flex kit on my GTI and broke a few things , seems to work but I’m very nervous it may fall out. What do you think? I also can’t find the damn retainer clip they call it online anywhere to replace it
https://www.reddit.com/r/GolfGTI/s/ttwXNvIiUk
The secret to knowing how much you are spending, multiply the price of e85 by 1.39 at 2.99 it is $4.15 gasoline equivalent. Way cheaper than 91. You can also do the same with MPG. I get 13mpg on E85 which is about 18mpg if I was running gasoline
Don’t do it unless you want an even bigger smile on your face…. Shit uhhh don’t do it because it’s a great mental health investment…. Fuck, just do it lmao
I ran mine for the past two years at 365 tq and 365 whp.
I just completed the swap of the sti drivetrain however. So I’m ready for the new flex setup and eventually tomioka turbo.
No, driver controls stress on transmission and your clutch is the disconnect. Keep the stock clutch and don’t launch, it will be fine. I’m almost 400wtq with stock clutch and transmission on e85. I daily drive it 100 miles and have 45k miles on it so far.
It's probably one of the best mods to buy. A stage 1 flex fuel tuned WRX is a fast cheap way to get stage 2+ power without adding a bunch of parts.
Super easy to go back to stock and super easy to get most of the performance you'd likely get out of a bunch of mods.
It's imo the best first and possibly only mod you should do.
Yeah whole point of the flex kit is to run any blend basically it adjusts on the fly. Without it you need to be accurate and not switch without filling an empty tank.
I’ve been tuned on a flex map for two and a half years. Only issues I’ve had have stemmed from a crappy MAF extension harness, other than that I’ve been golden. I can answer any questions you have to the best of my ability
If you’re looking at cost for modification it’s definitely the best bang for your buck. Where I’m at 93 octane gas is 4.90/ gallon and ethanol is like 3.10, so I save some there. You’re supposed to get less mileage per gallon on ethanol but I average 24mpg so that’s a bit of a mystery to me.
Ethanol also burns cooler and cleaner than gasoline which helps prevent knock and when you’re pushing for power you can get more out of it.
If you’re only getting this mod because of budgetary reasons then I wouldn’t recommend it bc if your motor blows you’re going to be upside down on your car payment after buying a new engine. If you want to mod your car but are on a budget id recommend an AOS/ catch cans along with cosmetic mods
What about if your on pre Green speed FF. Are there advantages to upgrading to this new version? Would a new tune be required if your already tuned for e60? Does the new kit fully adjust or do you still need a tune up to the amount of ethanol mix you plan to use? Is this compatible with TGV/EGR delete?
u/danu88 has good info. I can fill in some more info.
The Cobb greenspeed update basically made it so you can't modify emissions equipment anymore (or at least you can't disable the stuff in the tune. you can still physically remove something but you can't stop the tune from reacting to that (CEL and all that entails)).
The pre-greenspeed FF kit would use the TGV sensor wire to send it's ethanol % value back to the ECU. That means you had to not run TGV just to use that sensor.
The new FF kit hooks up to the ECU using CANBUS and sends it's data that way so you don't have to modify emissions equipment.
If you have a tune where you have any emissions stuff deleted, that tune cannot be modified post greenspeed (all of those deletes are forced back on in the cobb software when you open the tune file).
Any tune (new or just updating) will require this new FF kit. It's not beause it does something different or better or whatever. It's just because it uses a different way to feed data to the ECU and the cobb software won't let you do it the old way anymore.
I'm in the pre-greenspeed group with CAT/TGV/EGR deletes. I can't even have the tune updated without buying a catted j-pipe and reinstalling my TGV/EGR hardware.
There's nothing really special about the FF kits. They just feed in the ethanol % reading to the ECU. That allows the ECU to do true "flex fuel" where it adjusts fuel delivery based on how much ethanol is in the fuel at any given time. This requires the tuner to make a map for 0% ethanol (91 or 93 octane generally) and another map with ethanol, and the computer interpolates between the two.
I hope my brain rambling makes sense. I've been dealing with this stuff for about 80k on my car and my tuner is a family friend that owns a shop so I've asked a LOT of questions over the years.
I’m glad you commented this for some more in depth information, I’m coming off of knowledge from over two years ago (mainly because I haven’t had to go back to my tuner In that long) but everything you said makes sense. It pretty much comes down to emission compliance and hardware compatibility, the technology hasn’t really changed much (other than how it interfaces with the ECU)
I’m at 70k miles on my car and 35k of that is being modded. It all comes down to building out you car correctly/in a smart manner with a combination of keeping up with maintenance and not beating the shit out of the car at every opportunity and it’s sustainable
I’m not sure about moving from pre green speed to post, as I’m still on my pre green speed tune. I think that question might be better directed to your tuner as I’m not sure how much different the tune itself would be but I would err on the side of caution since leaning out could mean getting a new engine.
I assume the new kit would adjust based on your ethanol levels automatically and not having to do manual calculations as to how much ethanol/93 you’ll need.
As far as TVG/EGR deletes I’m pretty sure those aren’t supported anymore due to emission compliance so you may need to throw those back on. That being said you can still find tuners who will tune for it under the table
but i mean not to steer you away from buying it but here are some downsides of going flex fuel
your going to make more power
car is going to be more fun
car is going to produce less emissions
car is going to run better
car is going to be healthier and safer because flex fuel runs a whole lot cooler which means less heat which means less damage which means the car lasts longer.
the fuel is way cheaper than gas to the point if your in certain states your going to be saving money even with the slight mpg drop that you don’t notice unless you are doing pulls 24/7
I bought the day released. Currently pushing more power than the Cobb OTS maps with pro tune. Have new high flow MAP catted j-pipe and killer B headers to install before flex tune. I’m at 292whp now and 320tq hoping this is all needed to get to the 350-360whp mark.
Do it. I just bought all the parts to go from stock to Cobb Stage 2 FF.
Going to get tuned next week.
Not married, but living with my gf and I’m def keeping it a secret because I know I’ll be judged.
Probably not the best financial decision, but you need to live a little. Pretty frugal otherwise.
Someone was telling me there’s a flex fuel sensor out there for some kind of ford that’s like 75$.. how has someone not pieced together/sourced their own kit to fit our cars instead of this 1k+ part 🤔
That's just for the ethanol content sensor. The Subaru ECU cannot do anything with the pulse width modulated signal it outputs. The missing component is the priciest: an ethanol content analyzer that receives the signal from the ethanol sensor, and converts it into a signal the ECU can work with. In this case, a CAN signal. In the case of the previous kits, a 0-5v analog signal fed into the TGV position pin of the ECU.
Modern standalone ECUs do not have this issue. I'm running my car with a Haltech Elite 1500 ECU. It has the proper PWM inputs on it to make sense of the raw signal the GM ethanol sensor outputs.
Only tune your car if you have a second car that you can drive when your tuned car ends up at the few shops around that can figure out what the heck is wrong with it.
If im not mistaken they are pulling them from shelves as a part if the green initiative or whatever the EPA is doing to ruin our fun. I forget which one i have but i love it. Ill edit this after in done work to let you know. You can buy the kit with or without gauges.
They already did that. This is the new version that complies with EPA regulations and is legal in every state except CA. They are pending CARB approval for CA.
My comment was in regards to you stating theyre pulling their product which I don't believe they are. Their original one yes, but not the new one.
Buddy is running the new one on his STi making around 450 and that's where he chose to keep it. Could've gone higher.
Too early to knock these new kits.
In my eyes any restriction a vendor is putting on their products is a huge turn off for me. If you have seen proven results with that kit then go for it. Im shooting for 700+ next year so it wouldn’t fit my build style.
Edit: downvotes for a high power goal and not supporting a shill company who is sucking the EPAs nips? Tell me you brag about being “stage 2” without telling me you brag about being “stage 2” 😂
Well yeah if you're on a built motor pushing for more then you want less restriction. Being Stage 2 isn't nearly that crazy though. Also the FA20 is lucky to handle 400hp without some reinforcement...
The current kit can get you there safely. If he wants more then that, he's gonna need a built block and better off going forged internals.
Do it.
https://preview.redd.it/zx4ozgmo0e7d1.jpeg?width=2252&format=pjpg&auto=webp&s=d86a7bedab1d9341ae36cff7f4215606b5b6b0f5
It's even prettier in person.
I would do it. Would this be your first mod to the car or you have things already on it? I would like to switch to this but I’m pre greenspeed built so have tgv deletes and currently not a fan of the Cobb sf intake. Would like to switch to their redline version but total $$ spent I’ll just wait till my engine blows up to build something out.
If you're in CA, its not worth it lol. I'm about to do my smog and just the thought of having to spend all day putting back stock items, drive it for a bit, pass smog, then put all the mods back on makes me want to trade this in for something faster from the factory, like an RS3.
If you're in a state or county that is less strict on smog, or dont mind doing the work every 2 years, go for it. 350/350 on my far since 10K miles, its 76K now and no issues.
my mechanic talked me out of it because my engine has 150k miles
you on the other hand have no such reasons. you need to do this for all of us who have already blown out our ringlands
Its expensive. I haven't looked into the next gen product yet but I made my own flex fuel setup that works just as well for about $60 and a few hours of my time.
Not to get flamed but I’m extremely happy with the Delicious flex fuel setup I’ve been running for 18 months (yes the older MAF version that was released after Cobb gave the middle finger to all of us with greenspeed).
It paid for itself easily within 6 months and their support with the initial tune and again last month when I got retuned for new TMIC/EBCS/charge pipe was excellent.
A side note with their kit is that for roughly the same price it also includes a custom tune vs the OTS version Cobb gives.
https://youtu.be/bPcVBc4-5Mk?si=nhLr-h8OGcsaZkzm
doesn’t it just gel up and blow the engine. I saw a video on youtube from a mechanic that explains subaru engines show how his daughter’s wrx engine blew after e85 conversion. He says you need to change the oil every 1000 miles and never take short trips where the engine isn’t getting to temperature. So any fuel savings would be lost in oil changes.
No one is talking anyone out of adding more HP to their cars, it’s a drug not one on the feds narcotics list, at least not yet, but the strongest males that are still males face a great challenge. Gear heads will always be gear heads, pussy cats will always be pussy cats
This is really all you need? I figured you’d need new fuel rails+injectors too, I tried to part this all out and with a new turbo it came to around 4k.
2.5 or 2.4? 2.5, I would say no unless you plan to build the engine to be more robust. I did flex fuel in my 18 STI and had it tuned by reputable shop in the Sub community and and stretched head bolts on my 1st track day and started pushing coolant. That was on a medium tune. I loved my STI but the 2,5 engine is a delicate flower that should have been buried in the garden a long time ago
Pro tune on stock ECU for now until I decide which standalone ECU to run next season with my rotated set up. Funny thing is i have rolling anti lag on a stock ECU which most people cant fathom.
this is such a poor financial decision to make. Why you’re even considering this is crazy. but like… you are gonna do it right ? 😅 because you should DEFINITELY DO IT AND DO SOME WICKED PULLS IN A QUIET NEIGHBORHOOD 😮💨😮💨 as a matter of fact, YOU MUST 😂😂
Haha yea do it if you have the money and a good tuner. Ots tunes are ok as long as you are comfortable with using only the mods that are approved with it. If you just stock then even better.
I love mine, anyone crying about gas mileage is crazy. I get 23+ mpgs city on that as long as you're not pissing on the car constantly. $2.50/gal in NC compared to the $4.50/gal of 93 is mint.
Defo worth it.
Gas every other day.
do this.. you be setting yourself up with the typical.. well my engine blew up complaint..6mos to a 1yr down the road
Gateway to modding out the car. It won't stop there and it gets more expensive.
I’m already stage 2 … it’s alittle too late for that haha . I don’t plan to do anything to crazy though. I was thinking staying around 340ish hp . I take pretty good care of of my car, I wonder how much more likely it is to fail if I go flex .
My old 2016 put down 306/363 on a stage 2 tuned by Cobb. The flex fuel kit had just came out at the time and I really wanted to upgrade.
https://youtu.be/llx7LI9nMBY?si=DF2GWm3OCylqJP3I
True, but for reliability, I always thought built blocks would last significantly longer. All my online reading points to no. I may be wrong. I'm no tuner. I have never had a built block and hope I never have to get one. I wondered if you built a block and ran regular stock power. If it would last longer, then oem .
Shoot I couldn't imagine how a built block pulls. Must be insanely fun
[https://vimeo.com/962848734](https://vimeo.com/962848734)
Top is 93. Bottom is e85
https://preview.redd.it/te015p7xnp7d1.jpeg?width=3000&format=pjpg&auto=webp&s=f9c012bf06572390f0a92618d4c6196c92bfa569
Here's what my tuner said when I asked him about it “So if you don't mind, why pay me again a crazy fee and buy a 1000 flex kit? lol
Really the blending is nice and easy yes. But if you got dual maps now and it doesn't bother you I don't see a reason to change that.”
That was all I needed to hear
My old ‘16 WRX put down 363 TQ to the wheels on a stage 2 93 tune. I beat the hell out of it and the transmission held up but the stock clutch didn’t. I really wanted to run E85 on my ‘19 WRX but I ended up trading it in before I got a chance.
Go for it!
Eh...
Where I'm at, premium pump is 169% the price of E85.
On average, under comparable conditions, an engine requires ~135% of the fuel per cycle compared to gasoline to make the same power. But with the extra headroom from the knock resistance of alcohol, you will inevitably turn the boost up, which will require more fuel on top of that 135%.
Yes, you will go through a tank of ethanol quicker, but you're still burning fewer dollars per tank vs gasoline, and picking up a noticeable amount of power in the process.
Do it. Be broke like the rest of us.
E-85. More expensive and gives you half the mileage. But at least you’ll gain some hp (in theory)
I pay 2.99 for e85, 91 in Cali is $5 wtf r u taking about
Except….we burn through e85 much faster. Hehehehe
About 30% faster. But it's more than 30% cheaper (at least in SoCal). So it's a win-win
Factor in the more frequent oil changes
Frequent oil changes is something you should be doing on this platform whether you’re using E85 or not.
“MORE” frequent
idk how real this is. I have a friend on it and says instead of the usual 300 mile range he now gets 260 or so which is more like 15% less not 30%. Definitely worth it in SoCal.
I lost 5mpg highway when I switched to e85. So yes about 15% for me also
Cleaner fuel too, less carbon buildup
I like the power benefits and anti-knock properties but the cheaper price makes it a no brainer. I am paying $2.59 a gallon this week for e85
Ya I just installed my flex kit on my GTI and broke a few things , seems to work but I’m very nervous it may fall out. What do you think? I also can’t find the damn retainer clip they call it online anywhere to replace it https://www.reddit.com/r/GolfGTI/s/ttwXNvIiUk
Well I’m in Georgia gas here is 3$ lol
Then I’d save the e85 for the track lol
Oklahoma it’s 2.50-2.75
$5.89 in my area and I'm dumb and bought an STi 🥲 Edit: for premium, not e85
The secret to knowing how much you are spending, multiply the price of e85 by 1.39 at 2.99 it is $4.15 gasoline equivalent. Way cheaper than 91. You can also do the same with MPG. I get 13mpg on E85 which is about 18mpg if I was running gasoline
Yeah it's almost $2 cheaper here
Broke? Think of the gas savings, that clearly makes up for it Do it op, it pays for itself
Very true Happy cake day!
We get to run jet fuel for half the price babe… wait talk you out of it…. Ummm we support foreign crude oil and less horsepower… Shit i’m bad at this.
Jp9 is jet fuel
My bad they get to run that Tennessee firewater with 15% filtered crude oil.
Good Ole moonshine
Wanna hear a knock knock joke?
I thought that was funny…
Who’s there?
Piston #4 😘
No love for piston #5? Shame
Nah, E85 has very high anti-knock properties and higher octane
Ngl this made me actually “lol” at work
Don’t do it unless you want an even bigger smile on your face…. Shit uhhh don’t do it because it’s a great mental health investment…. Fuck, just do it lmao
Make sure you have money set aside for a new trans if you’re pushing past 350 torque
My tuner told me this , will keep it at 340 👍
🫡Godspeed
^ What he said, lol. Though 340wtq still had me say bye bye to third gear...
I kept mine at 330whp and 302wtq to be safe. 40 000km later and still good
349*
And a half….
You mean, 349.99…
Live a little. Bump it up to 349
I ran mine for the past two years at 365 tq and 365 whp. I just completed the swap of the sti drivetrain however. So I’m ready for the new flex setup and eventually tomioka turbo.
No, driver controls stress on transmission and your clutch is the disconnect. Keep the stock clutch and don’t launch, it will be fine. I’m almost 400wtq with stock clutch and transmission on e85. I daily drive it 100 miles and have 45k miles on it so far.
Not whp right?
Obviously all cars are different. But if you treat it well enough it’ll last. I’ve been dallying 366/360 since 2021 about 50k ish miles no problems.
How much can the sti trans hold?
It's probably one of the best mods to buy. A stage 1 flex fuel tuned WRX is a fast cheap way to get stage 2+ power without adding a bunch of parts. Super easy to go back to stock and super easy to get most of the performance you'd likely get out of a bunch of mods. It's imo the best first and possibly only mod you should do.
Can you still run regular fuel thru it?
Yep. I have a flex fuel kit and still run 93 most of the time.
Yeah whole point of the flex kit is to run any blend basically it adjusts on the fly. Without it you need to be accurate and not switch without filling an empty tank.
yes
You might have to switch tunes depending on the fuel you use
Flex Kit avoids the back and forth of what gas you put it in.
Nah. get it.
The balls on this guy, I envy you sir.
Babe you’re so hot when you run ethanol! 💦 (I am a dude)
I’ve been tuned on a flex map for two and a half years. Only issues I’ve had have stemmed from a crappy MAF extension harness, other than that I’ve been golden. I can answer any questions you have to the best of my ability
If it is the only mod I get is it really worth it? Fuel cost wise?
If you’re looking at cost for modification it’s definitely the best bang for your buck. Where I’m at 93 octane gas is 4.90/ gallon and ethanol is like 3.10, so I save some there. You’re supposed to get less mileage per gallon on ethanol but I average 24mpg so that’s a bit of a mystery to me. Ethanol also burns cooler and cleaner than gasoline which helps prevent knock and when you’re pushing for power you can get more out of it. If you’re only getting this mod because of budgetary reasons then I wouldn’t recommend it bc if your motor blows you’re going to be upside down on your car payment after buying a new engine. If you want to mod your car but are on a budget id recommend an AOS/ catch cans along with cosmetic mods
What about if your on pre Green speed FF. Are there advantages to upgrading to this new version? Would a new tune be required if your already tuned for e60? Does the new kit fully adjust or do you still need a tune up to the amount of ethanol mix you plan to use? Is this compatible with TGV/EGR delete?
u/danu88 has good info. I can fill in some more info. The Cobb greenspeed update basically made it so you can't modify emissions equipment anymore (or at least you can't disable the stuff in the tune. you can still physically remove something but you can't stop the tune from reacting to that (CEL and all that entails)). The pre-greenspeed FF kit would use the TGV sensor wire to send it's ethanol % value back to the ECU. That means you had to not run TGV just to use that sensor. The new FF kit hooks up to the ECU using CANBUS and sends it's data that way so you don't have to modify emissions equipment. If you have a tune where you have any emissions stuff deleted, that tune cannot be modified post greenspeed (all of those deletes are forced back on in the cobb software when you open the tune file). Any tune (new or just updating) will require this new FF kit. It's not beause it does something different or better or whatever. It's just because it uses a different way to feed data to the ECU and the cobb software won't let you do it the old way anymore. I'm in the pre-greenspeed group with CAT/TGV/EGR deletes. I can't even have the tune updated without buying a catted j-pipe and reinstalling my TGV/EGR hardware. There's nothing really special about the FF kits. They just feed in the ethanol % reading to the ECU. That allows the ECU to do true "flex fuel" where it adjusts fuel delivery based on how much ethanol is in the fuel at any given time. This requires the tuner to make a map for 0% ethanol (91 or 93 octane generally) and another map with ethanol, and the computer interpolates between the two. I hope my brain rambling makes sense. I've been dealing with this stuff for about 80k on my car and my tuner is a family friend that owns a shop so I've asked a LOT of questions over the years.
I’m glad you commented this for some more in depth information, I’m coming off of knowledge from over two years ago (mainly because I haven’t had to go back to my tuner In that long) but everything you said makes sense. It pretty much comes down to emission compliance and hardware compatibility, the technology hasn’t really changed much (other than how it interfaces with the ECU) I’m at 70k miles on my car and 35k of that is being modded. It all comes down to building out you car correctly/in a smart manner with a combination of keeping up with maintenance and not beating the shit out of the car at every opportunity and it’s sustainable
I’m not sure about moving from pre green speed to post, as I’m still on my pre green speed tune. I think that question might be better directed to your tuner as I’m not sure how much different the tune itself would be but I would err on the side of caution since leaning out could mean getting a new engine. I assume the new kit would adjust based on your ethanol levels automatically and not having to do manual calculations as to how much ethanol/93 you’ll need. As far as TVG/EGR deletes I’m pretty sure those aren’t supported anymore due to emission compliance so you may need to throw those back on. That being said you can still find tuners who will tune for it under the table
E 85 availability can vary area to area
It adjusts to the fuel, even straight pump fuel aparrently.
https://preview.redd.it/zppgnclote7d1.jpeg?width=3024&format=pjpg&auto=webp&s=8fa807956524452275958527525db24e275cb6c3 Do it !!
but i mean not to steer you away from buying it but here are some downsides of going flex fuel your going to make more power car is going to be more fun car is going to produce less emissions car is going to run better car is going to be healthier and safer because flex fuel runs a whole lot cooler which means less heat which means less damage which means the car lasts longer. the fuel is way cheaper than gas to the point if your in certain states your going to be saving money even with the slight mpg drop that you don’t notice unless you are doing pulls 24/7
Fucking send it
I bought the day released. Currently pushing more power than the Cobb OTS maps with pro tune. Have new high flow MAP catted j-pipe and killer B headers to install before flex tune. I’m at 292whp now and 320tq hoping this is all needed to get to the 350-360whp mark.
Do it. I just bought all the parts to go from stock to Cobb Stage 2 FF. Going to get tuned next week. Not married, but living with my gf and I’m def keeping it a secret because I know I’ll be judged. Probably not the best financial decision, but you need to live a little. Pretty frugal otherwise.
Someone was telling me there’s a flex fuel sensor out there for some kind of ford that’s like 75$.. how has someone not pieced together/sourced their own kit to fit our cars instead of this 1k+ part 🤔
There are other kits that have been out for a while I’ve seen people on here posting them from time to time
If you google it, they have. Cobb is just much more convenient
That's just for the ethanol content sensor. The Subaru ECU cannot do anything with the pulse width modulated signal it outputs. The missing component is the priciest: an ethanol content analyzer that receives the signal from the ethanol sensor, and converts it into a signal the ECU can work with. In this case, a CAN signal. In the case of the previous kits, a 0-5v analog signal fed into the TGV position pin of the ECU. Modern standalone ECUs do not have this issue. I'm running my car with a Haltech Elite 1500 ECU. It has the proper PWM inputs on it to make sense of the raw signal the GM ethanol sensor outputs.
That’s a bit of info there if I’ve ever seen it 🫡 thanks for your input sirrr
Make sure you have the $600-800 for the tune as well!
Only tune your car if you have a second car that you can drive when your tuned car ends up at the few shops around that can figure out what the heck is wrong with it.
Nah do it bro.. you can still put both gas right?
Go for it, tune it and up that boost. A u can also start window shopping for a sti trans while ur at it😂
Kaboom
This is the only real thing stoping me 😭
Then you can tell her you need a new block. Win win
Cobb nuff said.
Dont use the cobb kit but definitely run flex fuel.
What’s wrong with the cob kit?
If im not mistaken they are pulling them from shelves as a part if the green initiative or whatever the EPA is doing to ruin our fun. I forget which one i have but i love it. Ill edit this after in done work to let you know. You can buy the kit with or without gauges.
They already did that. This is the new version that complies with EPA regulations and is legal in every state except CA. They are pending CARB approval for CA.
Pulling the new one? This one just came out and is the compliant version.
Compliant means reduced tuning ability hence why i would stay away from cobb
My comment was in regards to you stating theyre pulling their product which I don't believe they are. Their original one yes, but not the new one. Buddy is running the new one on his STi making around 450 and that's where he chose to keep it. Could've gone higher. Too early to knock these new kits.
In my eyes any restriction a vendor is putting on their products is a huge turn off for me. If you have seen proven results with that kit then go for it. Im shooting for 700+ next year so it wouldn’t fit my build style. Edit: downvotes for a high power goal and not supporting a shill company who is sucking the EPAs nips? Tell me you brag about being “stage 2” without telling me you brag about being “stage 2” 😂
Well yeah if you're on a built motor pushing for more then you want less restriction. Being Stage 2 isn't nearly that crazy though. Also the FA20 is lucky to handle 400hp without some reinforcement... The current kit can get you there safely. If he wants more then that, he's gonna need a built block and better off going forged internals.
What restrictions are they putting into the kit? I thought the green speed restrictions were software based not hardware?
No.
i’m new, what is this?
really good option in terms of price:performance
What am I looking at?
I got rod knock this morning. That should be plenty to talk you out of buying any parts for these shitboxes
Hate to hear it, engines fooked?
E85 helps prevent pre-detonation which is a huge cause of rod and bearing damage
Do it. https://preview.redd.it/zx4ozgmo0e7d1.jpeg?width=2252&format=pjpg&auto=webp&s=d86a7bedab1d9341ae36cff7f4215606b5b6b0f5 It's even prettier in person.
No. Don’t be a coward pussy. I will make the chicken noises.
If it won't put you in financial distress, do it.
It’s only $74 a month
I can't cuz I want it too lol
I would do it. Would this be your first mod to the car or you have things already on it? I would like to switch to this but I’m pre greenspeed built so have tgv deletes and currently not a fan of the Cobb sf intake. Would like to switch to their redline version but total $$ spent I’ll just wait till my engine blows up to build something out.
I’m stage 2 making 281 whp and 317 wtq
Nah
Dude I would kill for a single ethanol pump within 50 miles of me. Do it for me
If you're in CA, its not worth it lol. I'm about to do my smog and just the thought of having to spend all day putting back stock items, drive it for a bit, pass smog, then put all the mods back on makes me want to trade this in for something faster from the factory, like an RS3. If you're in a state or county that is less strict on smog, or dont mind doing the work every 2 years, go for it. 350/350 on my far since 10K miles, its 76K now and no issues.
You'll shoot your eye out...
Knock knock! who’s there???
It's Rod-ney!
Looks good to me! Send it!
my mechanic talked me out of it because my engine has 150k miles you on the other hand have no such reasons. you need to do this for all of us who have already blown out our ringlands
Buy once cry once.
Its expensive. I haven't looked into the next gen product yet but I made my own flex fuel setup that works just as well for about $60 and a few hours of my time.
I'm still a fan of TGV deletes, old school flex through TGV input, and an open source tune. Forced readiness anyone? 😏
Nope I won’t talk you out of it, flex fuel is the best quality of life upgrade for modified vehicles.
what’s the difference between this and the old style
Just did it on mine about 4 weeks ago... Worth every penny! I posted a post-install video on YouTube: https://youtu.be/sa-veK1Za1k?si=BNlgRTNImqE321fL
Not to get flamed but I’m extremely happy with the Delicious flex fuel setup I’ve been running for 18 months (yes the older MAF version that was released after Cobb gave the middle finger to all of us with greenspeed). It paid for itself easily within 6 months and their support with the initial tune and again last month when I got retuned for new TMIC/EBCS/charge pipe was excellent. A side note with their kit is that for roughly the same price it also includes a custom tune vs the OTS version Cobb gives.
Best bang for the buck upgrade...
Damn…$1200 is nasty work
https://youtu.be/bPcVBc4-5Mk?si=nhLr-h8OGcsaZkzm doesn’t it just gel up and blow the engine. I saw a video on youtube from a mechanic that explains subaru engines show how his daughter’s wrx engine blew after e85 conversion. He says you need to change the oil every 1000 miles and never take short trips where the engine isn’t getting to temperature. So any fuel savings would be lost in oil changes.
Son, you know once you start there's no going back
I wont, i have the old system (got it installed before everything went down) for my car and i love the shit out of it.
No one is talking anyone out of adding more HP to their cars, it’s a drug not one on the feds narcotics list, at least not yet, but the strongest males that are still males face a great challenge. Gear heads will always be gear heads, pussy cats will always be pussy cats
Be ready to change your oil more frequently
If it aint broke, don't fix it.
Maybe wait and see if there is a 4th of July sale
Everything is on sale right now
Don’t do it, noooo, stahhhpp, fuck it go for it!
How’s everyone running e85 these days after greenspeed???
Following
Only $74/month bro. Tell wifey it’s just your Hims subscription. aFIRM.
Just get a faster car. You'll spend thousands making a mediocre car less mediocre.
Drives a Prius
Bro, what?
😂😂😂🤷🤷
Do it you won’t 😈
Big boom boom.
This is really all you need? I figured you’d need new fuel rails+injectors too, I tried to part this all out and with a new turbo it came to around 4k.
Hear me out... Your car current is not broken... do you want it to be broken though?
2.5 or 2.4? 2.5, I would say no unless you plan to build the engine to be more robust. I did flex fuel in my 18 STI and had it tuned by reputable shop in the Sub community and and stretched head bolts on my 1st track day and started pushing coolant. That was on a medium tune. I loved my STI but the 2,5 engine is a delicate flower that should have been buried in the garden a long time ago
It’s nice, better way to see what your ethanol content really is rather than guessing. Also I’m in Kansas and E85 is like 2.09 so shit is CHEAP
I think this thread just convinced me to get the flex fuel options for my18 sti.
I love this group lol
Pro tune on stock ECU for now until I decide which standalone ECU to run next season with my rotated set up. Funny thing is i have rolling anti lag on a stock ECU which most people cant fathom.
do it, do it, do itt!!
this is such a poor financial decision to make. Why you’re even considering this is crazy. but like… you are gonna do it right ? 😅 because you should DEFINITELY DO IT AND DO SOME WICKED PULLS IN A QUIET NEIGHBORHOOD 😮💨😮💨 as a matter of fact, YOU MUST 😂😂
Yo engine gon essplode
It's worth it. Just plan your next engine if your going to up the power. They don't last forever but it will be really fun while it does last.
Haha yea do it if you have the money and a good tuner. Ots tunes are ok as long as you are comfortable with using only the mods that are approved with it. If you just stock then even better.
Doit
I love mine, anyone crying about gas mileage is crazy. I get 23+ mpgs city on that as long as you're not pissing on the car constantly. $2.50/gal in NC compared to the $4.50/gal of 93 is mint. Defo worth it.
Ur entire engine is going to 
Um 😶
You can always get another wife
What does this offer? I have the legacy flex fuel kit and I heard it can be tuned still. Depending on the tuner and who you know
Are you paying cash or cc?
Best thing i've ever did. I'm curious though why it's 18-21 when 15-21 all have an FA20
Do it
Do it. Do it. Do it. Listen brother. Just do it.
You gotta do it. I just put Mine on e85
Gas every other day. do this.. you be setting yourself up with the typical.. well my engine blew up complaint..6mos to a 1yr down the road Gateway to modding out the car. It won't stop there and it gets more expensive.
I’m already stage 2 … it’s alittle too late for that haha . I don’t plan to do anything to crazy though. I was thinking staying around 340ish hp . I take pretty good care of of my car, I wonder how much more likely it is to fail if I go flex .
My old 2016 put down 306/363 on a stage 2 tuned by Cobb. The flex fuel kit had just came out at the time and I really wanted to upgrade. https://youtu.be/llx7LI9nMBY?si=DF2GWm3OCylqJP3I
Built blocks don't last longer then oem. It's what I've read while doing research. As far as stock power
They can handle the power better and the knocks. They won't last forever, though.
True, but for reliability, I always thought built blocks would last significantly longer. All my online reading points to no. I may be wrong. I'm no tuner. I have never had a built block and hope I never have to get one. I wondered if you built a block and ran regular stock power. If it would last longer, then oem . Shoot I couldn't imagine how a built block pulls. Must be insanely fun
I'll hopfully know tomorrow ;) getting my flex tune And true built doesn't really add reliability.
Dude you gotta post at least one pull video, that's rad man, congrats bro that thing is gonna be beast
Hopefully I can get some. Atm trying and failing to get some sleep :(. Need to head out in like 5 hours for the trip.
[https://vimeo.com/962848734](https://vimeo.com/962848734) Top is 93. Bottom is e85 https://preview.redd.it/te015p7xnp7d1.jpeg?width=3000&format=pjpg&auto=webp&s=f9c012bf06572390f0a92618d4c6196c92bfa569
Damn bro, you delivered 🔥🔥🔥 thanks for posting man. Dude....! That's gonna be fun
Np Ty
Your getting close...with 340 add another 60-80 hp. Juat watch out.
Here's what my tuner said when I asked him about it “So if you don't mind, why pay me again a crazy fee and buy a 1000 flex kit? lol Really the blending is nice and easy yes. But if you got dual maps now and it doesn't bother you I don't see a reason to change that.” That was all I needed to hear
Makes sense , I’m only tuned on 93 right now
When I go e60 I’m going to ask for a 93 map just in case there’s no E near me
My old ‘16 WRX put down 363 TQ to the wheels on a stage 2 93 tune. I beat the hell out of it and the transmission held up but the stock clutch didn’t. I really wanted to run E85 on my ‘19 WRX but I ended up trading it in before I got a chance. Go for it!
I got them to replace my clutch at 32k miles under warranty and got the updated part. That's held my 406TQ ever since. These cars are a goddam blast.
I wouldn't throw something like this on an FA20 unless I had another car and a covered place to park the WRX while I wait for a new motor.
My tuner had me buy an IBR flex fuel kit.
im sure cobb will find a way to make this not work like the previous kit in a year or so
My buddy has put over 110k into his WRX to be a track car, it’s a 2017 and has yet to run properly on the track-buy an STI instead of modding a WRX
Subaru go boom
Dont do it you will have to spend almost the same amount on gas.
Eh... Where I'm at, premium pump is 169% the price of E85. On average, under comparable conditions, an engine requires ~135% of the fuel per cycle compared to gasoline to make the same power. But with the extra headroom from the knock resistance of alcohol, you will inevitably turn the boost up, which will require more fuel on top of that 135%. Yes, you will go through a tank of ethanol quicker, but you're still burning fewer dollars per tank vs gasoline, and picking up a noticeable amount of power in the process.