Help!!! Thinking about switching to E85

Reply Subscribe

Thread Tools

Search this Thread

Apr 23, 2013 | 04:19 AM

TransAm2002

Thread Starter

Pro

Joined: Oct 2004

Posts: 591

Likes: 0

From: Las Vegas NV

Help!!! Thinking about switching to E85

I have a C5 Z06 with a 416 LS3 in it. compression is 11.5:1 What kind of gains will I see switching over to E85? I run 91 octane now. I tried to research this but no one really has a set up like mine. Thanks for any info.

Apr 23, 2013 | 06:34 AM

helga203

Le Mans Master

Joined: Jul 2010

Posts: 5,986

Likes: 719

Quote:

Originally Posted by TransAm2002

First of all if your fuel system is not up to part don't do it. To get good results with e-85 you need about 30-40% more of it than 91 oct (volume ). So what that means is if you have stock fuel system your going to starve your sngine and run lean and possibly damage. Must get bigger injectors and fuel pumps capable of handling e-85. You just can't change to it. Hope this helps.

Apr 23, 2013 | 07:15 AM

rmata

Racer

Joined: Jan 2009

Posts: 271

Likes: 0

From: TX

I ran e-85 for a while on a n/a setup. Fuel smelled better, car ran smoother, price was much cheaper....Downfall was that the gas mileage suffered a little and I don't think it really picked up much hp. I was able to add 5 more degrees of timing, but it wasn't an increase I could even feel. And there is only 1 station in town that offers it so I decided to switch back to 93. If you have the fuel system and tuning software then it's cool to experiment with it.

Apr 23, 2013 | 12:34 PM

TransAm2002

Thread Starter

Pro

Joined: Oct 2004

Posts: 591

Likes: 0

From: Las Vegas NV

I have a 255 pump (racetronix kit) and will be using 65lb injectors. Just don't want to switch for 10 hp. 15+ would be worth it.

Apr 23, 2013 | 06:56 PM

helga203

Le Mans Master

Joined: Jul 2010

Posts: 5,986

Likes: 719

Quote:

Originally Posted by TransAm2002

I have a 255 pump (racetronix kit) and will be using 65lb injectors. Just don't want to switch for 10 hp. 15+ would be worth it.

I believe from my research e-85 really helps s/c'ed and turbo's a lot more then NA, because of the heat they make in the combustion chamber e-85 doesn't heat the chamber as much and when you add boost and timing bam some great hp gains.

Apr 23, 2013 | 07:02 PM

GoatKart

Instructor

Joined: Mar 2006

Posts: 220

Likes: 0

From: ames ia

Simply put, it depends on how much timing your able to run right now....

If your able to run nearly MBT timing on 91 or 93, then you'll see very little if anything from running E-85....

Chances are it won't be worth the switch...

Apr 23, 2013 | 07:21 PM

TransAm2002

Thread Starter

Pro

Joined: Oct 2004

Posts: 591

Likes: 0

From: Las Vegas NV

With all the research I have found I guess I will be staying with what I have now.

Apr 23, 2013 | 07:31 PM

Chicago1

Race Director

Joined: Mar 2008

Posts: 12,413

Likes: 501

From: Rio Rancho NM

There is a guy on the c6 forums that runs e-85 on his ls3 and made good power while everyone was saying it won't due much. Ill see if I can find the post but it's something to look into.