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03-01-2013, 03:26 PM
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BBC Piston I. D.
I'm changing out an older Herbert F/T for a retro roller cam in my T-Bucket, with no information on an earlier rebuild. Other than pulling the motor and dropping the pan to I.D. the pistons, I have no way of calculating my static c.r., if I can avoid pulling it, that would be nice.
It's a '67 396 passenger block, 3902406, stock bore and I was told stock pistons for that motor. The numbers have been milled off the front pad. The heads aren't anything to get excited about, 3904390's, I believe oval port 98cc, but I can measure them to verify that. Crazy as it sounds, can anyone I.D. these pistons, and the volume, assuming they are stock '67's? Thanks!
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Horsepower is how fast you hit the wall. Torque is how far you take the wall with you. Midnight Sun Street Rod Association 
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03-01-2013, 04:10 PM
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How tall are the domes?
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03-01-2013, 04:45 PM
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Stock cast pistons. All 396 were dome. -17cc.
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03-01-2013, 07:17 PM
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Thanks for the quick reply Bob.
Bowtie, the dome is about .188, which is probably .21cc, the piston has one valve relief, so I think Bob is right on at -17. Great help, thanks again.
__________________
Horsepower is how fast you hit the wall. Torque is how far you take the wall with you. Midnight Sun Street Rod Association
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