Posted by T.L. (IP: 209.138.165.166) on June 03, 2000 at 03:44:02:
In Reply to: Holley jetting posted by Russ on June 02, 2000 at 22:32:15:
Those carbs come from the factory with size 66 jets and holleys are jetted quite lean from the factory for the most part. You need to find out what you have in there now and start by dropping it 2 sizes; after that drop it one size at a time. I run the 66s in my 302 and it runs fine although I do agree with Rickyracer for the most part. Power valve also comes into play if you're running too rich and fouling the plugs...
: I need a base line on what jets to use in a 1850 holley. I bought it used off of a 383 Chevy motor so I think it is jetted to big for my mild 289. Can anyone give me a place to start. I know nothing about carbs or tuning. The plugs are black and wet. The engine has about 50 miles on it since the rebuild. It also quit running twice today once like it was running out of fuel(while driving at speed), and the other as I was pulling out from a stop. Too much fuel? Any help would be great thanks in advance. Russ