Thread: need help, pisron hits valve

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Originally Posted by sal0327

Hello, the heads are 049's. Person i spoke to at summit prior to buying pistons told me It should be around 9.5:1 compression. The timing marks are dead on. the engine is going into a 72' nova mostly street driving. I'm starting to see a lot of money down the drain. What should i do? If I buy new set of pistons do I need to rebalance the rotating assembly? thanks

no that cam should fit i have put bigger in .i have had the intakes allways hit when bigger valves were put in or over milled did you degree the cam? try retarding the cam 4 degree and see it that helps yes you can get the pistons fly cut there other ways to. i done all of them over the years the ex is the ez side to fix .now the pistons are on the rods it s not so EZ to fly cut them less they are floating pins they have to come off the rods to fly cut them