My experience has been that Demons are way too rich out of the box, typically by about 6-8 jet sizes the primary side and even fatter on the secondary side; usually I end up having the secondary jets about 4-6 sizes bigger than the primaries.I've messed with over a dozen Demons, both Road Demons, Speed Demons, King Demons, and a couple of their 6-shooter setups and they were all pig-rich as delivered.
It's hard to say without driving your car and checking the plugs but my guess is you'll end up somewhere around 76/82 for jetting, probably even a little leaner.
Also, if it's a brand new Demon completely gut it and clean it-- you might be surprised how many burrs and debris comes out of the main body/airbleed passages/metering blocks... it can cause all sorts of driveability issues depending on where the "junk" goes and what it clogs.
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1969 Chevelle
Old setup: Procharged/intercooled/EFI 353 SBC, TKO, ATS/SPC/Global West suspension, C6 brakes & hydroboost.
In progress: LS2, 3.0 Whipple, T56 Magnum, torque arm & watts link, Wilwood Aero6/4 brakes, Mk60 ABS, Vaporworx, floater 9" rear, etc.
Last edited by Blown353; 05-24-2007 at 11:15 PM.
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