Re: New member introducing myself and Holley carb
A couple of other tricks you can do with GMC V6 with the 500 cfm Holley to help rid of the rich condition is first - advance your timing and second - burn a higher octane fuel 89 or 91 would do. Advancing your timing starts the burning sooner and with the slower burning higher octane fuel this provides a better burn cycle. There's no book setting on our modified GMC V6 engines once you alter the factory engineering specs - changing 1 item (carb) starts a snowball effect that takes time to conquer - there's a lot of experienced people on here to help with the puzzle. A better performance cam profile is a great help to get more air when you add more fuel in the mix. Welcome to the forum and Good Luck!
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