Thread: pinging
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Old 12-10-2017, 11:46 AM
Three Peaks Three Peaks is offline
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Join Date: Jan 2005
Location: Hillsboro, OR
Cobra Make, Engine: Scratch built CSX style frame, Carbon fiber body, 393 Stroker, T-bird IRS, T5
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I'm running the XR 294 cam on my 393 with Vic Jr heads and don't have any problems. I made sure to degree in the cam when installing.
Have you checked what your compression ratio is? Your post doesn't specify or say which pistons your are running? You need about 20CC or more of dish in your pistons to stay in the 10:5 compression area recommended for using pump gas.
Also, IMO, that is a lot of carb for a 402. A 750-780 double pumper would be plenty of carb for that engine.

Bob
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