John wrote:E85 runs about 105 octane, 12-13 :1 compression ratio is sweet on this fuel. It is hostile to some existing fuel tanks, lines etc.
Heres a good read on E85 http://members.tccoa.com/392bird/e85.htm
John wrote:I thought it worth reading, and yes it responds well to the increase in compression. 16.1, I think could be tough to work with considering our head design.
John wrote:You are looking at custom pistons, price for 6 hypereutectic pistons, floating pins, cost to machine.... vs custom piston. Spec it to stand proud of the deck, thick flat top and then custom machine for valve clearance. Polish them well and have the tops coated. The head can be shaved over .2, I wouldn't. Careful cam selection is a must. Move valves closer together and enlarge them ever so slightly. Polish combustion chamber to 80 grit finish. 26# fuel injectors
1bolt wrote:Imagineering the 4.0 pistons was what got me asking here, it's not even close to possible, but it was worth thinking about. The next logical CHEAP junk yard style thing to do is use the old 4.2 rods and 4.0 pistons. Which has been in my E85 plan since we were talking about this on NAXJA a couple years back. Not enlarging the dish will get decent static compression, and running a small turbo will provide the rest... The good part about this aproche is you can still run 93 octane pump unleaded, just turn the boost down with an adjustable BOV.
To solve the E85 supply issue in my neck of the Virginia woods, I might go full moonshine... As in building a still and fermenting it from high starch solids, and denaturing it with gasoline.
I've read that you can produce E85 for as little as a buck a gallon buying corn feedstock. Stills are not that hard to set up (if hill billys were doing it in the 30's...) and there's a lot that modern technology can bring to the table.
Its WAY better than Biodiesel because you just need starch (corn, potatoes, even houshold garbage possibly) you don't have to go to McDonalds and beg them for their waste french fry oil.
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