Posted by ChadS on April 29, 2008 at 06:57:11 from (4.224.78.59):
In Reply to: Re: Running E85 posted by farmer101IL on April 29, 2008 at 06:09:46:
First, run a compression test, this will give you the sign if you do need a cyl pressure increase to run E85. Each tractor has its own specific application for the E85 conversion, not all engines are equal. Ive converted everything from A farmall cub, to my dads 96 dodge ram 2500 wih a 360. I must had too much tme on my hands back then,,, LOL!! I havent found a tractor that I couldnt make run on E85 and run good on it. Colder weather is the factor here,,, cold starts need to add more gasoline to cut the mix back so it will ease starting in cold weather. This winter, my sisters E85 flex fuel mini van wouldnt start on a 20 degree morning. So, we did pour in about 3 gallons of gasoline back in the tank and it fired right up once it got circulated in the fuel rails.
Timing needs to be retarded more than the stock book specs, and the carb jets must be opened up to let more in. Usually on a tractor engine,, once the conversion is complete,, the engines have about 3-7 more HP over gasoline, I dont care what they say about running it in cars or trucks,,, it does make power in antique tractor engines in any form. Cars and tractors are not the same setup, and nobody rally tries to tune the cars EFI to accomidate the E85,,, and really, not much they do different on a e85 vehicle than the regular EFI vehicle as far as actual parts are concerned,,, other than change the program in the computer chip, and set the fuel rail pressure up another 5-10 psi with an adjustable regulator to make it run properly, and a changed timing curve in the computer.
On the Ford tractor,, try a 50/50 mix,, 1 gallon to 1 gallon, and rejet the carb, reset the base timing. Then once you got the basics down, you can slowly wean the tractor off the gasoline and run it straght.
Many different methods to increase cyl pressure. Shaving heads, increasing ci displacements, are the most common ways. Most have high compression piston kits that raise cyl pressure and can be bought most anywhere. ChadS
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