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in my experience the #6 piston failure is a drag car occurrence for the most part - and it comes from to much timing -- we run as much as possible and an actual hole in a piston to me its detonation or a piece of metal throttle blade screw - air vent horn - pump sprayer that sort of thing but -- who knows -- the fuel pump could have after a 10 15 min run time could have slowed its flow and leaned the motor ??? if you want to be sure contact the pump company and ask for the flow test info - like in 20 seconds it should put out one gallon of fuel sort of thing and add it to your by monthly checks yea its another thing but thats racing -- jz
PS 46 deg of timing and cheap gas in photo
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