How to tune a demon? [Archive] - Chevelle Tech

: How to tune a demon?


1968Rat
Mar 16th, 04, 6:13 PM
Hey guys whats up, ive got a few problems here with my demon 750. I cant get the thing to idle, and it seems to dislike warming up. I still have yet to time my motor, but is there a web guide out there that'll show me the way around a demon carb? I know how to tune and build a q-jet, and these demons seem do-able with the four corner idle, but id need help from the guys who are in the know-

cmt454
Mar 16th, 04, 6:22 PM
http://www.bgfuel.com/demon/default.aspx?page=techsupport

Try this

Silver69Camaro
Mar 16th, 04, 6:42 PM
Never tune a carb w/o tuning the ignition first!

broke
Mar 16th, 04, 11:49 PM
The biggest mistake new Demon owners make is monkeying with the "throttle adjustment" screw to set the proper idle speed... Both primary and secondary throttle blades need to be evenly opened with the transfer slots being "squared." Check out http://www.4secondsflat.com/demon101.html its got a pretty good run down on basic demon tuning.