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Old 10-13-2003, 10:11 PM
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Question cam,pistons,heads,and valves

i have a balanced steele crank in a 350 with 11 to 1 pop-up pistons.an edelbrock matched cam and lifters/.510 lift 2.02 fuelie heads. screw-in studs with roller rockers. my problem is that when i try to start it i bend the pushrods. what am i doing wrong?

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Old 10-13-2003, 10:20 PM
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Somethings really wrong there. Are your valves hitting the pistons? Did you clay the pistons to check for clearance before you started it up? If you can't see anything obvious from up top I would suspect the problem is they made contact. Bent pushrods go hand in hand with bent valves. I've bent enough of both. If you can run a compression check with the rockers at zero lash.
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Old 10-14-2003, 07:00 AM
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It can be a few things, coil bind- the need for hardened push-rods because of the stronger valve springs.
Plus the most important one as lluciano77 said, are the piston valve pockets really cut for the valves.
I don't think you have the proper clearance as described.
I would check it out before turning it over any more, other damage can happen.
George
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