Thread: My thoughts on E85 GTP's

Originally Posted by SeanGTP

So what do you do, drop in some E-85, burn off the rest of the gas you have in the tank, then do the tune?

I actually had almost 1/4 tank of premium in the tank when I changed the pcm and filled it up on e85. The car misfired under boost and all sorts of crap. I didn't feel comfortable accelerating hard until about 3 full tanks. Best thing to do is run your tank as low as possible then fill all the way up on e85. And don't go WOT until after you are on E again and fill back up.

Originally Posted by nawarkk

Who did your tune? Ryan C.?

Ryan C did the 93 octane tune. I did a mail order E85 tune from Dyno Brian at Dyno tune Motorsports.

I wanna do more mods to the prix but idk I think E85 is my only other option without spending big time bucks on a cam or intercooler..

You don't even need an intercooler on E85, It actually kills more KR than a full size IC because it burns so cool and the octane is so high. I wouldn't convert for power gains without some headers and a good exhaust. Remember you have to push 30% more of this stuff through the engine...

Originally Posted by JoRoW99

Did you drop pulleys with e85? if so what size and was it your only mod that let you drop?

I didn't drop a pulley size. I had a Knock free cam/ Full size IC setup. I probably saw a small increase (similar to slightly higher compression is the comparison I can come up with) From the 30% more fuel volume flowing through the engine. The rest of my power came from the 3* of extra timing and extra cooling. My tune is very conservative because I wanted to be safe with the mail order and dial it in later on. Even still, I can feel a BIG increase in power.

The part that amazes me is, I can probably run 23-24* of timing and also drop to a 2.55 pulley without any KR. But I will probably pulley down for the track and only add 1-2 more degrees of timing. I don't want to pop my 15 year old head gaskets.

Originally Posted by Juanmiguel

I just found out that my city will be the pilot program for Ethanol fuel in Mexico. I'm trying to figure out where the stations that have it are.

What do I need to run it besides the tune? I bet I can run at least a .1 smaller with it.

All you need is bigger injectors and a tune. You will probably clog up a fuel filter or 2 shortly after a conversion, so they will need to be replaced.

I purchased a race-tronix fuel pump because I was hunting down a fueling issue I had. Turns out one of the feed lines under the hood was kinked and bent. I hear the stock pump will flow just fine for e85. And depending on your mods, you might be able to drop 3 or 4 pulley sizes on e85. A cammed car with headers should be able to run a 3.0 or 2.8 no problem without an intercooler on e85. Usually those setups run a 3.4- 3.2 on pump gas

Dang those are some pretty powerful statements there. I may consider this for my next mod if i dont buy a tuner. (or both)

Did you dyno after the conversion? I'd like to see numbers. Did you mention what kind of mileage you are getting?

I feel pretty confident in saying you could daily drive a 3.0" pulley on a cai, headers, injectors, running E85 summer blend with an average tune...

E85 & Flex Fuel Station Finder | Ethanol Retailers

Holy hell there is an E85 station literally a block from my house. I didnt notice because its not really a gas station...

Originally Posted by JoRoW99

Holy hell there is an E85 station literally a block from my house. I didnt notice because its not really a gas station...

I kind of hate you right now. (in a really happy for you kind of way)

Haha well see, here in Nebraska all we have is corn...

Hands Down my best mod next to the VS cam.

And a little something for everyone to think about: I installed a full size inter-cooler and dropped from a 3.1 to a 2.8 pulley on premium gas, then re-tuned.

I feel more of a power gain from switching to e85 without dropping another pulley size and without dialing in the tune.

Originally Posted by nawarkk

With the mods in my sig.. I could do a 3.2 is what you'r saying?

I think I'd go to Ryan for a tune too.. How do you go about the tune.. do you just show up on a tank of e85 and injectors installed? My friend had to tune his car for the injectors then empty the pump gas and put e85 in and retune. sound right?

Ryan didn't do my e85 tune. I had Brian from Dynotune Motorsports do it.

best way to do this is to switch the injectors with as little gas in the tank as you can. fill up on e85 and drive around very carefully and slowly until you are empty again (do this on un-tuned injectors). Then fill back up and tune for the injectors and the e85.

When you put the injectors in without a tune, it will allow you to be able to drive around on e85. Try to stay out of boost and definitely do not go WOT until you go through the first tank of e85 and re-tune.

there are probably safer ways to do that.

Originally Posted by JoRoW99

there are probably safer ways to do that.

It's pretty safe as long as you're smart about it.

The un-tuned injectors will make the fuel trims pretty close to where it should be anyway for e85. It's just a matter of getting all the gasoline out the tank. The AFR will be rich until it's all out. There's really no way around driving until the gas is all purged. Then of course WOT tuning.

Originally Posted by JoRoW99

there are probably safer ways to do that.

Buy NEW fuel tank, replace injectors, replace fuel filter, while tank, filter, and injectors are out hook air hose to lines and blow out all fuel from the lines. Assemble everything, trailer to local e85 station, fill with E85, trailer to place for tuning.

Otherwise, use precaution and don't kill your car

I meant like run your car completely out of gas (until it dies), put in your e85 tune and injectors, add a couple of gallons of E85 from a jug, then drive to a station and fill the tank. They probably all work though.

Run the tank empty, get a can of e-85, tune for your new injectors you are installing while the tank is empty, add 30% fuel for E-85, drive the car fill the rest of the way and start dialing in the tune. I do not recommend running around on un tuned injectors and e-85 at all that is horrible advice.