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johnwb · 06-28-2006, 09:38 PM

Has anyone used an e303 cam with a 650 holley on a 302,I have tried everything i can think of,it seems to run fine but the first crack of the throttle it will backfire out the carb,almost lost my eyebrows,lol,It has plenty of power higher rpms,It seems once the rpms come up its okay,I have my base timing at 12 degrese now and it idles okay, its when you crack the throttle fast that it backfires.any ideas would be appericated,thanks.

06-28-2006, 09:38 PM	#1
johnwb 88lx work in progress Join Date: Jul 2005 Location: canada Posts: 62	backfire Has anyone used an e303 cam with a 650 holley on a 302,I have tried everything i can think of,it seems to run fine but the first crack of the throttle it will backfire out the carb,almost lost my eyebrows,lol,It has plenty of power higher rpms,It seems once the rpms come up its okay,I have my base timing at 12 degrese now and it idles okay, its when you crack the throttle fast that it backfires.any ideas would be appericated,thanks.