dfinke23

The o-rings in the tank crossover tube are vulnerable. A friend was doing some work on his and replaced the crossover o-rings. They lasted about a month.

So far the injectors are holding up.

dfinke23

The way to go is stay under 12:1 CR, change the injectors and have two tunes.

Mopar Jimmy

Not worth the hassle and TOO DIFFICULT to sell making it almost certain that you have to go back to pump gas if you go to resell.

A 93 octane pump gas max effort heads/cam set-up easily makes 600+ rwhp these days, and the compression ratio with the right quench can still be run at real close to 12:1 to CR, so just not worth it in my opinion for a small performance gain, when just about the same can be achieved on pump gas (without the hassle and need for multiple tunes, etc.).

Just my two cents and that's all it's worth!

palindrome1H

Here in Michigan we have a ton of e85 stations. However, I decided against going e85 since 93 octane is the standard premium in this state. Sunoco also sells 94 octane. Wasn't worth the pros vs cons on my end.

vertC6

Yikes! I have not heard of that issue, that could be dangerous to develop a leak in that area. Your saying that the first set of O-rings were damaged by the E85 and then he replaced them and the second were gone in a month?

With all the people running E85 why do you think others have not reported this?

dfinke23

I'm not sure what damaged the first set. Yes on the 2nd set being gone in a month.

Mopar Jimmy

Well there you go, that KILLS the idea of E85 on 99% of corvette owners!

Screamin Z

The first set was damaged during removal of the cross over tube. (lesson learned) The second set was not GM O-Rings.. They were O-rings that we use on our construction equipment. Right size, but not the right material for E85/Gas usage.

3rd set was back to GM's O-Rings and no problem since.

Fuel was not pouring out of the fuel cell.. just upon inspection of stuff I could see where it was damp and slowly running running down the frame rail. But yes a potential serious problem.

As far as the E85 Disscussion its mostly already been said.

Pros:
Smooth Power!
Lower Cylinder temps
Cheaper than 104 octane
Smells like popcorn!

Cons
Fuel Consumption
Avalibility
Fuel supply upgrade

paisa427

Any one try a meth injection system instead? Same results as e-85 that is only being used when needed.
I have been running e85 in my evo for years and i love the stuff. The only thing that is stopping me from running it in my Z is that I daily drive my Z from march/april til snow fall and at the moment just has bolt ons. The main reason i would even consider it is due to the cooling effects that it provides(cant beat having december like air all the time). I know first hand how bad the MPG's get with using E85.

BLU-BY-U

there's some really good info....and some really bad info in this thread......e85 is not the grim reaper to your fuel system.

Katech_Zach

I've been running E85 for 17 months and I don't have this problem.

paisa427

New fuel systems are made to handle ethanol(just about all pump gas now a days is 10% Ethanol). Care to chime in on how your mpg been affected by the switch?

Katech_Zach

I know. That's why I commented that I don't have that problem.

As far as the mileage, exactly 30% drop as expected.

vertC6

But that is 30% at the same CR, when you run 13.5 : 1 with E85 you will nearly cut that in half.

Chameleon T/A

I've been running E85 for close to 2 years now with no issues as well.

LEAVINU

Thank you for chiming in and clarifying that.

phxcobra

I agree. I hate when some people that have no experience with something poo poo it like some others in this thread.

MTIRC6Z

Yeah, you gotta love it when guys chime in with expert sounding comments and yet the most significant mod they made on their own car is an extended warranty

If you want to get some major bang for your buck with E85 stick it in your CTS-V, you can run 10 degrees more timing and end up with upwards of 150 extra hp

Cheers, Paul.

busaetr

i'm 13.8:1 and on e85.. i'm fixing to change some things and putting a dual nozzle meth kit will be one.. i mainly want it to help kill some heat in my sheet metal intake, but i'm going to see what kind of difference 93/meth and e85/meth do power wise..

Screamin Z

In his defence.. He was un aware that we used non GM O-rings.

Dont cut corners kids!