Thread: holly carb

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checked plugs they were black sooty, timing is set at 8 deg. distributor, dist cap,rotor,coil,wires are all new. I had the same carb on the other intake no problems, when i put the new one on i noticed a loss in everything, I figured i just had to fine tune things,but no help. Then on my drive home it just started to bogg out. when it is at idle it sound good, when you give it gas theres a lot of grayish black smoke out the tail pipes.when i put it in gear it bogs out and barely goes. It wont even spin the tires on gravel

The EPS that you had on the engine is a square bore and the Performer is a spread bore and IMHO that is your problem. For some reason, I'm no engineer, the primary signal gets messed up when a Holley is mounted directly to a spread bore manifold.