Hybrid Car – More Fun with Less Gas

E85 conversion?

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Posted by delete-this on January 2, 2006, 8:54 pm

    I've got a '91 Toy 4x4 with the 22RE engine. E85 fuel is available
hereabouts and I'd really like to run it, but I'm not sure what parts in
the fuel system need to be changed. I'm running E20 now with no problem.
    I'm thinking that the TCCS (computer-controlled) ignition should
work well with E85 since it will advance the ignition until the knock
sensor feels detonation and then cuts back a bit, so the higher octane
will be utilized. I wish I had a turbo with computer controlled
wastegate so the engine would fully  be optimized for ethanol.
    Has anyone tried converting a vehicle to E85?

Posted by SJC on January 2, 2006, 10:21 pm

  I have not tried it, but I hear that alcohol fuels are a solvent.
You need a special gas tank, stainless fuel parts and special
rubber seals. Maybe someone else knows more about what
it all would cost.

Posted by Daniel Armstrong on January 2, 2006, 11:05 pm

Not sure about cost but don't forget the special higher pound per hour e85
compatible fuel injectors and a software update for the computer so it
doesn't throw a CEL due to the lean mixture (ethanol carries some of its own
oxygen so you must inject more of it to reach the stoicheometric mixture)

Posted by Harmon Seaver on January 2, 2006, 11:45 pm

Daniel Armstrong wrote:

    Yes, bigger injectors definitely -- that's one of the main
differences in the "flex-fuel" cars. Partly that's needed to enable
starting with E85 in cold weather. I'm not sure whether any change would
  be needed in the computer, especially if I added the bigger injectors.
Probably wouldn't be possible anyway.
     If I went all the way with it, I'd also install either
high-compression pistons or shave the head (or both) to get the
compression up to around 13:1. My son's Audi would convert a whole lot
easier, since his computer adjusts injection, turbo boost, and ignition
automatically for octane levels -- he says he can get about a 50hp boost
just by adding some toulene to his gas.

Posted by Harmon Seaver on January 2, 2006, 11:38 pm

SJC wrote:

   No special gas tank or fuel parts other than maybe some seals, but
probably not even those, since ethanol mixed fuel has been on the market
for a long time now, and even small amounts of alcohol (less than the
10% which is the usual regular gas nowadays) will eat susceptible rubber

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