going E85

[darkknight13]

ive been reading a lot of posts on here and it seems like everyone is goin E85 to get into the 10's. other than the injectors what else would be required to make the switch to E85...im already goin unitronic stage 2 which will allow me to switch between whatever octane I want but as far as hardware what will I need to run E85...and is E85 really worth it in the end or can I make it into the 10's on a full stage 2 unitronic setup. thanks

[sakn]

Stage 2 Unitronic does upper 10’s on 93 file assuming running all required hardware (which should be if running Stage 2).

[darkknight13]

Stage 2 Unitronic does upper 10’s on 93 file assuming running all required hardware (which should be if running Stage 2).

yea I plan on running all unitronic hardware as well as the iroz intercooler and downpipe since unitronic doesn't have one available yet

[Razzaa]

ive been reading a lot of posts on here and it seems like everyone is goin E85 to get into the 10's. other than the injectors what else would be required to make the switch to E85...im already goin unitronic stage 2 which will allow me to switch between whatever octane I want but as far as hardware what will I need to run E85...and is E85 really worth it in the end or can I make it into the 10's on a full stage 2 unitronic setup. thanks

People have gone 10’s on Stage 1+ E85


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[darkknight13]

People have gone 10’s on Stage 1+ E85


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I know but im trying to stay with 93 octane...heard some horror stories about E85 and its reliability in the long run

[Razzaa]

I know but im trying to stay with 93 octane...heard some horror stories about E85 and its reliability in the long run

Horror stories about E85? Whatever stories you heard were most likely ignorance on their part. E85 is definitely superior when it comes to making power on this platform. It is also very safe if you know what you are doing.


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[timmyzr1]

The Beauty of uni uconnect is you flash your car to whatever you are planning to use! I mostly use 93 tune with injectors. Cuz everytime I want to put my previous/buddy FBO zr1 to shame, i flash E85 file. Then reflash to 93 back home or whatever need to refuel! Damn quick on E85 it WORTH it!!!!

[r26372]

Horror stories about E85? Whatever stories you heard were most likely ignorance on their part. E85 is definitely superior when it comes to making power on this platform. It is also very safe if you know what you are doing.


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Hard to know the longer term impact on running E85 car not setup for it. Sure it produces a lot of power and can be tuned to fit the stock fuel system. Fact is this has been on 1-2 year old cars, once they are 5-6 years old I guess we'll know how the car is holding up. If you swap cars every 3-4 years like I do then by all means do it. If you drive your car into the dirt, time will tell


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[timmyzr1]

When i first bought this car is was a family sedan to save on gas and have a lil fun..... Oh boy it turned out different!!!

[Razzaa]

Hard to know the longer term impact on running E85 car not setup for it. Sure it produces a lot of power and can be tuned to fit the stock fuel system. Fact is this has been on 1-2 year old cars, once they are 5-6 years old I guess we'll know how the car is holding up. If you swap cars every 3-4 years like I do then by all means do it. If you drive your car into the dirt, time will tell


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This isn’t the first platform to run E85 lol. Not even close. If it was an older vehicle I would be concerned. Newer vehicles, if tuned properly, can run it without issues. All gasoline has at least 10% in it already. Like I said, nothing to fear when done properly. With that said, it is like anything else, it has it’s pros and cons. When it comes to making power though, it is far superior to gasoline


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[r26372]

This isn’t the first platform to run E85 lol. Not even close. If it was an older vehicle I would be concerned. Newer vehicles, if tuned properly, can run it without issues. All gasoline has at least 10% in it already. Like I said, nothing to fear when done properly. With that said, it is like anything else, it has it’s pros and cons. When it comes to making power though, it is far superior to gasoline


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Obviously not the first platform to use e85 and aware of the power benefits. I run it 2/3 of the year. 10% is a lot different than 85%. It's corrosive and gunks things up. This has also been shown on other platforms. Car can run great on it, but wear on parts not designed to handle long term exposure to it and may not have nearly as long a shelf life.


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[SlowSedans]

High 10s are straight forward to run on 93 and stage 2.

[context.eax]

I did a 11.0 sec 1/4 mile on Unitronic stage 1+ 98Ron full weight. I am just about to install a dogbone and I heard that this could help a bit on the launch. If this is the case then I guess I should be able to go 10.98 ish. Would this be considered as high 10 or perhaps very high 10?

[Ross_T_Boss]

Obviously not the first platform to use e85 and aware of the power benefits. I run it 2/3 of the year. 10% is a lot different than 85%. It's corrosive and gunks things up. This has also been shown on other platforms. Car can run great on it, but wear on parts not designed to handle long term exposure to it and may not have nearly as long a shelf life.

I'm not bothered with a long term car, if you have to replace stuff it just becomes a maintenance cost. Just like tuning in general - probably gonna have to replace some parts sooner as a result.

The fuel pumps and DI are components that are a bit of an unknown, lubricant is the issue around E50+ potentially. Lines have been fine for years with EU cars. I use Lucas additive; a corrosion inhibitor and generally around E65 which I think mitigates that - maybe sufficiently to be a non-issue, but it's good to see folks putting 2-3yrs of E85 on these cars already. Worst case, maybe I'll have to upgrade the fuel pump after 5 years and get a hybrid turbo to justify it

[darkknight13]

This isn’t the first platform to run E85 lol. Not even close. If it was an older vehicle I would be concerned. Newer vehicles, if tuned properly, can run it without issues. All gasoline has at least 10% in it already. Like I said, nothing to fear when done properly. With that said, it is like anything else, it has it’s pros and cons. When it comes to making power though, it is far superior to gasoline


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now when you say done properly I am going full unitronic stage 2 with an iroz intercooler and downpipe only because uni doesn't offer either one...with that being said are you saying that when I have the stage 2 tune I can just switch to E85 and go fill up my fuel tank with a full tank of E85 and start seeing results like that say for like a track day and then when that's over I can just flash it back to 93 octane and do normal daily driving?

[Potatohead_RS3]

now when you say done properly I am going full unitronic stage 2 with an iroz intercooler and downpipe only because uni doesn't offer either one...with that being said are you saying that when I have the stage 2 tune I can just switch to E85 and go fill up my fuel tank with a full tank of E85 and start seeing results like that say for like a track day and then when that's over I can just flash it back to 93 octane and do normal daily driving?

Sort of. You can't run the 93 file with E85 in the tank (not more than about 20% E) unless you are just driving very slowly out of boost. So you would need to have about 1/4 tank of E85 then fill with zero ethanol gasoline.

[darkknight13]

Sort of. You can't run the 93 file with E85 in the tank (not more than about 20% E) unless you are just driving very slowly out of boost. So you would need to have about 1/4 tank of E85 then fill with zero ethanol gasoline.

well yea I mean I know you can mix fuels so I would have to get it down to empty on either one that I was switching to but I didn't know it was that simple to switch between...and what do you mean by zero ethanol gasoline?

[Dominick's S4]

well yea I mean I know you can mix fuels so I would have to get it down to empty on either one that I was switching to but I didn't know it was that simple to switch between...and what do you mean by zero ethanol gasoline?

Yes.. It's actually that simple with Uni or the APR mobile app.. I generally will run the tank down to 10 miles or less of fuel remaining and Flash using Uniconnect and then fill my tank with the appropriate fuel. With Uni I prefer to flash to the new fuel type file before I fill the tank. My biggest concern with Uni is that I will change fuels and then not be able to get a wifi signal or mobile signal to download the file. After the flash I turn the ignition on and let it idle until the ethanol content is above e60 for the e85 file or below e20 for 93 octane file.. If you plan to switch back and fourth I highly recommend installing an ethanol content monitor. You don't ever want to get into boost with fuel that does not match the file..

[darkknight13]

awesome thank you so much for everyones help on this...really making me consider at least trying E85 and seeing the difference between the 2. cant wait to get the tune and all the hardware and really start having fun!

[r26372]

Yes.. It's actually that simple with Uni or the APR mobile app.. I generally will run the tank down to 10 miles or less of fuel remaining and Flash using Uniconnect and then fill my tank with the appropriate fuel. With Uni I prefer to flash to the new fuel type file before I fill the tank. My biggest concern with Uni is that I will change fuels and then not be able to get a wifi signal or mobile signal to download the file. After the flash I turn the ignition on and let it idle until the ethanol content is above e60 for the e85 file or below e20 for 93 octane file.. If you plan to switch back and fourth I highly recommend installing an ethanol content monitor. You don't ever want to get into boost with fuel that does not match the file..

I've always drove around slowly out of boost for about 5-10 milesband then switch maps. But idling would work too. What's the approximate eta you let idle? I don't have content monitor.


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[Potatohead_RS3]

well yea I mean I know you can mix fuels so I would have to get it down to empty on either one that I was switching to but I didn't know it was that simple to switch between...and what do you mean by zero ethanol gasoline?

Some gasoline has 10% ethanol, which is totally fine but if you're switching over and have too much E85 in the tank then your ethanol content might not get down far enough. So having a content analyser is a good idea.

[Razzaa]

Yes.. It's actually that simple with Uni or the APR mobile app.. I generally will run the tank down to 10 miles or less of fuel remaining and Flash using Uniconnect and then fill my tank with the appropriate fuel. With Uni I prefer to flash to the new fuel type file before I fill the tank. My biggest concern with Uni is that I will change fuels and then not be able to get a wifi signal or mobile signal to download the file. After the flash I turn the ignition on and let it idle until the ethanol content is above e60 for the e85 file or below e20 for 93 octane file.. If you plan to switch back and fourth I highly recommend installing an ethanol content monitor. You don't ever want to get into boost with fuel that does not match the file..

Exactly


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[Ross_T_Boss]

I've always drove around slowly out of boost for about 5-10 milesband then switch maps. But idling would work too. What's the approximate eta you let idle? I don't have content monitor.

It takes ages idling, much quicker to drive. About 20 minutes. I dont have a content meter either - I monitor short term fuel trims via VCDS which is a really good indicator. Can't remember exactly but generally under 20% is fine on 93 file, E85 I cant recall which is the more critical one! That would be a useful measurement to take for someone that has a Content monitor. Some flex-fuel cars use trim monitoring rather than a separate content sensor, referred to as a virtual ethanol sensor, from studies I've read they are pretty accurate when compared against each other.