Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Brand new Demon carb experiencing major tuning problems
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Old 08-13-2006, 02:59 PM
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Mad Maggot Mad Maggot is offline
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LOL @ the religious metaphor

There's quite a few reasons why you could be getting an off-idle stumble, Demons seem to be more prone to this. It's probably in need of some tuning. What engine/tranny/carb size/gear ratio do you have? I know that a heavy car with an auto tranny and highway gears can have a stumble with just about any carb, sometimes the squirters and pump cam need to be adjusted to cover this up.

Does the car idle well? Does it run smoothly at 1200-1500 RPM, or is there a constant lean condition (white smoke, choppy sound) at these RPM? Are your butterflies set to the proper positions? If it idles well, and runs well at a constant RPM, but hesitates or stumbles only when accelerating, then it's likely in need of some squirter/pump cam tuning.

I don't claim to be a carb wizard, but I've tuned my fair share. Here's a few great guides that can help with further tuning (written by experts, of course). They talk about tuning Holleys, but Demons work in pretty much the same way. - This one needs Adobe Acrobat
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