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**kwmech** · 08-25-2018, 05:58 PM

A heavy float can cause the carburetor to run too rich by letting too much fuel into the bowl. Partial flooding. Another thing---Choke pull off not cracking the valve open upon initial start? 6 degrees of timing is not too much for a big block, last thing you want is it pinging. I've got mine at 6 and it occasionally pings if I've got something heavy in it and pulling the hill on the freeway.

08-25-2018, 05:58 PM	#11
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,405	Re: rough running bbc A heavy float can cause the carburetor to run too rich by letting too much fuel into the bowl. Partial flooding. Another thing---Choke pull off not cracking the valve open upon initial start? 6 degrees of timing is not too much for a big block, last thing you want is it pinging. I've got mine at 6 and it occasionally pings if I've got something heavy in it and pulling the hill on the freeway.