Question: E85 in LT1/LT4
Thread Starter
4th Gear
Joined: Jun 2011
Posts: 4
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Question: E85 in LT1/LT4
Hey guys!
Has ever used anyone E85 as fuel for your LT1 or LT4 engines? I am very interested in building my 383 LT4 in the way that I can run it with FlexFuel (as GM calls it). I have to say that I have no experience with those ethanol mixed fuels so far.
* I know that E85's octance rating is somewhat above 100 (104) so that from the perspective of early detonation its use should not be an issue, even in high performance engines with higher compression ratios.
* From the performance side there should be no big difference between the E85 and usual 93/95 octane pump gas.
* What kind of modifications need to be done, if any? Computer, injectors, etc...?
* Are there any long term issues associated with running ethanol based fuels like E85 or E10? e.g. clog up of injectors, different burning rates and burning temperatures, fuel depostiotion on valves and valve seats, etc...?
Thanks for your help!
Take Care.
F.D.
Has ever used anyone E85 as fuel for your LT1 or LT4 engines? I am very interested in building my 383 LT4 in the way that I can run it with FlexFuel (as GM calls it). I have to say that I have no experience with those ethanol mixed fuels so far.
* I know that E85's octance rating is somewhat above 100 (104) so that from the perspective of early detonation its use should not be an issue, even in high performance engines with higher compression ratios.
* From the performance side there should be no big difference between the E85 and usual 93/95 octane pump gas.
* What kind of modifications need to be done, if any? Computer, injectors, etc...?
* Are there any long term issues associated with running ethanol based fuels like E85 or E10? e.g. clog up of injectors, different burning rates and burning temperatures, fuel depostiotion on valves and valve seats, etc...?
Thanks for your help!
Take Care.
F.D.
Burning Brakes
Joined: Oct 2004
Posts: 1,210
Likes: 1
From: fighter pilots make movies, bomber pilots make history
E85 vs current E90, you would never notice difference; fuel management system can handle it. The O2 sensor and computer will adjust injection rate to achieve stoichiometric burn range.
Joe
Race Director
Joined: Sep 2003
Posts: 16,837
Likes: 337
From: Database Error Indiana
You will need a bigger pump and injectors. How big depends on how much power you are going to make. And tune for it. I use Bosch III injectors and a 255 Walbro pump. Both have functioned fine for a lot of miles. I replaced the underhood fuel lines with teflon core braided lines. Just for safety. The alky lets you use an agressive advance curve and that can make more power for you. It also burns very clean. I recently had a head off and was impressed with how clean the chamber and tops of the pistons were.
