Thread: 780 Holley Double Pumper Carb for the Street??

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1150 holley idles fine at 1000. big cam 275 -287 @.050 drive it on the street runs ok much better at 4500 and up. what you need to do is open the back barrels there is a screw for this and back down the front idle screw you may be past the idle transfer slots on the carb and by cracking the back you will let more air and fuel and use the idle circuit this may help with fuel mix

Originally Posted by pat mccarthy

1150 holley idles fine at 1000. big cam 275 -287 @.050 drive it on the street runs ok much better at 4500 and up. what you need to do is open the back barrels there is a screw for this and back down the front idle screw you may be past the idle transfer slots on the carb and by cracking the back you will let more air and fuel and use the idle circuit this may help with fuel mix

Thats interesting and I will keep that in mind when I attempt to get it running in the next few day's.