tuning a demon carb

project67 said:

thanks for the replys. my carb is a road demon. 625 cfm vac. secondaries.
the engine is 5.0 with gt40 alum heads and x303 cam. i have the floats at the center of the sights and the idle set screws 1 turn from being all the way in. can this be a timing problem? i didnt think the float levels had anything to do with idle circuit, but again, im not really a carb guy. i pulled the carb off last nihgt and found there are slots in the bore that are supposed to look like squares when the butterflies are all the way closed. mine were not. i adjusted the secondary set screw to accomplish this and i will be reinstalling it and retesting tonight. my dad thinks the jets are too big-the were not numbered. arent theysupposed to be numbered? anyway, thanks for the input.

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10secgoal said:

Halfway is way too high. The jets have nothing to do with idle. Screw them all the way in the, and try to kill the motor. If they go all the way in and it doesn't die, then you have a larger problem than an adjustment.

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