Join Date: Dec 1999
Location: Salem,Oregon USA
My small block was running very rich and fouling plugs after about 10 miles. Low vacuum(8"@1000 rpms).
Opened the seconary plates and then could idle down to 850 rpms and vacuum uped to 10". Idle screws then had no affect on idle or vacuum.
Cars ran very good but after about 25 miles, started acting like fouled plugs again. They were fouled but not as bad as before.
What else can I do.
331" with 9.4-1 compression, Sportsman II, Comp XE274, Holley street Dominator intake / 750 Vac Sec carb (80508) 5.5 power valve 70 jets in primaries and what ever is in the seconary metering block.
HEI with 12 initial 34 total all in @ 2800