Originally Posted by prowagon55
If you have an adjustment screw for the secondaries and you adjusted your idle using the primary screw you probably exposed the transfer slot too much allowing fuel to dump in at an idle. Pull the carb and check to make sure the primary butterfly is closed enough to make the transfer slot appear to be squared on all 4 sides. Then use only your secondary adjuster for your idle. Its an easy mistake to make. I did it my self when i started using a race style carb.
Everything you said is true but that wouldn't have anything to do with it slowing down A SECOND AND A HALF just by sealing off a huge vacuum leak.
this statement doesn't make sense to me.
it has a proform 850 4 circuit idle screws the center section 850 holley
So is the main body a PRO FORM or is it a HOLLEY? Is it a Holley main body with proform metering blocks? Did you just put the 4 coner idle metering blocks on a 850 Holley body not designed originally for 4 corner idle?
You can't do that.
Is it a Double pumper or vacuum secondary?