[rob frink]

Tony hit the nail on the head!!! Don Gould knows demons!

I love mine!! There is a very important key to get them to perform. You must use a lot of initial iginition timing if you have a hot cam. Due to cam overlap, the engine doesn't want to idle...so traditionally, we open the butterflies to let in more air and increase the idle speed.....this is not the case with Demons...which rely on vacumm and air velocity to set up the a/f circuits. By increasing the intial timing, you allow more time for the fuel to burn in the cylinders....which increases the engine speed. ...Then slow the engine down by closing the butterflies with the idle speed adjuster screw......now you have vacumm and air velocity through the carb circuits. The low speed torque increases and the throttle response becomes amazingly snappy. With this done...the high speed circuits work properly. Demons are flow adjusted at the factory...and don't really require rejetting. If you are rejetting them...it is likely that something else is out of place. I've been through this with mine...I think there are many dyno-tuners that don't understand these carbs.....they are not the traditional "old-shool" jobs and require a differnt thinking process when tuning them. 4secondsflat had a great tech article online about this......But it looks like it's been taken down due to bandwith limitations.


tried to edit spelling errors