ryancera24

I heard nothing but gpod things about e85 other thsn my 08 turbolt will have injector seal problems later on but what do i actually need tp be ready to use i know you need to get it tuned first. Do i put e85 before or after the tune and can i still use regular 91 gas after the tune? Im asking becouse im getting a tune this afternoon for all my bolt ons and i still have half a tank left lol

yellowsupercharged06

iTrader: (3)

ohhh boy you need to do more hw .

ryancera24

Oh my current upgraded are 2* 3 bar map sensors, intercooler, chargepipe cold/hot, dp

ECaulk

iTrader: (6)

Dont go e85, stop at e47 (half e85 half 93 or 91). You'll want the fuel you want to tune for in the take prior to the tune (shortly prior to the first tune loading). The LNF can limp on a e blend without tuning for it just don't go wide open throttle

ECaulk

iTrader: (6)

I was trying to be nice

ryancera24

Ok i just read a few threads what size injectors do i need lol :X

ECaulk

iTrader: (6)

Keep reading....


The LNF had high pressure fuel injectors that don't have to be swapped to run e blends. Just stick to premium fuel for now.

Psykostevo

Definitely only go E47 on stock fuel system. (That's 50% E85 and 50% Premium Gasoline)

You will want to have a badass pump gas tune first before going to ethanol. The reason is that you want to have all of your MAF, MAF Corrected VE, and other tables ALL figured out prior to making the switch to ethanol. Once you get tuned for E47 you can never properly run stright pump gas again and should NEVER run full e85 in an e47 tune.

What I do for my tunes is I get them tuned up the way I want on pump gas, then we run the car virtually out of gas and drive to the station that sells ethanol. There we put in exactly half a tanks worth of E85 (find out how big your tank is divide in half and pump that much E85 in the tank. Top off with premium fuel for the rest.) Now you are on E47 and can run the tune. I flash the tune and then let the car idle at the gas station for a few minutes while watching the fuel trims, etc. Some slight adjustments may be needed to the injector tables to remove any positive or negative variation in fuel trims. (Remember that your MAF tables etc were already supposedly dialed in with your pump gas tune so dont compensate for E47 using your MAF)

The tune will require some power enrichment changes (usually a leaner lambda), definitely hike up the timing and optimum spark tables IF YOU KNOW WHAT YOU ARE DOING. And there are other changes too, CAM tables are optional but highly recommended.

When you know how to tune an ethanol setup it is a piece of cake, when you don't it can be a nightmare.

ECaulk

iTrader: (6)

Not sure if I completely agree with this, could be just the wording. You can always swap back to a pump gas tune, and if in a pinch you can run an e47 tune with pump fuel you just baby the **** out of it while your ltft shift to -15

KMO43

I don't agree either and you don't have to be on fumes to switch to e47 you just have to have less than a half tank so you can fill half with e85 then top off with premium. You can also adjust the injector constant to get a dead stock tune close enough to run e47 then log get avg adjust again then finish with the maf tuning

ECaulk

iTrader: (6)

How much timing are you able to push on your E25 tune without meth?

tuned08ss

My ltft is -14.8

ECaulk

iTrader: (6)

Something is seriously wrong

KMO43

I never ran e25 no meth. With 94 e10 and meth I ran 19° with e25 added I ran 23° both on 28psi

KMO43

I only did 2 tunes and 3 logs on e25 before I hit the dyno

Psykostevo

It was just in the wording. Of course you can switch your tune at any time and go to whatever fuel you want to be tuned for. Just wouldn't advise shoving straight 91 or 93 into an e47 tune. No sense in being that rich.

Yeah your LTFT will definitely go crazy, probably enough to throw a rich code since -14 or lower will be enough to pop the CEL.

Psykostevo

sounds like fun

Psykostevo

Freight Train much?! :-)

KMO43

What do u mean?

ECaulk

iTrader: (6)

As in you freight train people (instead of buses)

07blackg5

iTrader: (8)

I think hes referring to the fact that 28psi and 23* probably pulled like a freight train

My guess

KMO43

Raped 2 STIs an evo raced Nathan and played with a lambo