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Old 01-21-2008, 04:55 AM
VetteInOz VetteInOz is offline
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How to get a Chevy 302 under 10:1 CR

Thanks all for your comments.

I haven't been able to check the crank castings, will probably be tomorrow and I will let you know 302 Z28

Unfortunately my pistons are hollow domes so milling is not an option.

Following up on Double V23 suggestion I have again had a look for some 4 inch pistons and came across some Ford 351 $" pistons
So could someone let me know if these might work and again my apologies for my lack of mechanical knowledge

From Kb Pistons Website

Chevy 302 Spec
Bore 4"
Pin Dia 0.927"
Comp Ht 1.825"

Ford 351
Bore 4"
Pin Dia 0.9.12" maybe could be bored out to 0.927"????
Comp Ht 1.774"

the 351 pistons are flat tops and they quote CR of 10.5:1 with 64cc heads.

the reduced Comp height would reduces the CR some but by how much I have no idea??

Someone told my mechanic Uncle that there was a ford 302 piston available with Chevy pin diameter. Anyone ever heard of this??

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