Thread: need help, pisron hits valve

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Originally Posted by canadianal

Hey pat i dont know too much about big block chevys so i plead ignorace but would 4 degrees make that much difference if the exhaust is hitting like it is now? the valve hit pattern doesnt look right on the silly putty or am i looking at it wrong?
Big bumps on those pistons though

it going to tell that way the cam in the engine but but 4 will give you about 020 or abit more . it may not take much hard to say. if you do not try any thing ??? he said the rocker were crank way down to far?? so they could be hanging open ????hell i do not know what he did .i am not there but you have to start somewere i cut more then one set up pistons and i have moved more then one cam not my first timewere are they hitting ? if the ex was hitting it would make a line cross the dome the clay would be cut .i do not see that .i am thinking he crank the rockers all the way down and there hitting .1 he needs a solid lifter to check the pv so valve timing is rigth and is at O lash .2 ligth test springs would be nice to use but then what do i know