Thread: choosing a carb

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I've ran a number of engines on E-85....Choosing the CFM is pretty much the same as the formula for gas. As Moon mentioned, the metering and jetting is different for ethanol so if you get an alchohol carb it will be fine....Also make sure your fuel lines are up to the task of handling the additional fuel requirements.... I use -10 for a big block, -8 for a small block.... along with a good pump and a return line.....

PS---This is for drag racing, for street use many of the same applies, mabe a bit smaller on the fuel lines. On my 408 stroker, 2800 pound drag car, I ran a 750 CFM tuned and flowed by Vindicators that would flow an actual 790 CFM. Took it out of the box and installed it, made one pull on the chassis dyno, dropped 1 jet size and bracket raced it for 2 seasons with no problems.... Oh yeah, if you put your car up for the winter, make sure the entire fuel system is drained....