e 85 in a stock engine

[sawmillman]

Can I run e 85 in a stock 86 engine or do I need to have a chip burned for e 85.I am goning to clean out the fuel tank for sure.

 

[novaderrik]

you don't need to do anything to get it ready other than pull up to an E85 pump.. try 1/4 tank at first and see how it goes, then step up to 1/2 tank. i've tried pretty much every ratio of gas to E85, and settled on 50/50 as the point where i don't lose any mpg but pick up a lot of performance.
of course, i have a hot air car, so your results may differ.

 

[1QWIK6]

Run 50/50 mix of E85 and 93 octane.

Straight E85 will make the car surge and act funny.

 

[Hot Air]

Straight E85 with a stock TR (stock injectors and stock PCM) will run lean for sure since there are fewer BTUs (energy) in a gallon of E85. Of course, the octane is a lot higher so you might get away with it. Tread softly and check the spark plugs for signs that the engine is running too lean.
Conrad

 

[wordy1]

What about running it in a stock 1985 Monte Carlo with an LG4 305 with a CCC carb??

 

[novaderrik]

What about running it in a stock 1985 Monte Carlo with an LG4 305 with a CCC carb??

i don't think that would work too well- but have at it if you want. again, start with 1/4 tank and see what happens.
a guy at work was running straight E85 in the 305 in his stock 85 Blazer, and he said that once he pulled the timing ahead some (he doesn't own a timing light, so i can't say how much) and cranked out the idle screws a bit, it ran great. but his already poor gas mileage got even worse.

 

[The Flash]

guy that i know tunes e85 Honda's says they require a lot of fuel and timing advance

 

[bsdlinux]

guy that i know tunes e85 Honda's says they require a lot of fuel and timing advance

And that is a bad thing or a good thing??