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FE-FC Holden Discussion Forum > Technical Board > Modification Help (Moderators: RET, Glenn 'Stinky' Stankevicius, gp) > grey motor crank
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Author Topic: grey motor crank  (Read 1971 times)
john253a
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« on: March 12, 2012, 07:08:42 PM »
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just wondering what the safest compression ratio is to run on a stock 132/138 grey motor crank, with out stud girdles,

hoping 9:1 or even 9.5:1
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john253a
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« Reply #1 on: March 13, 2012, 12:53:01 AM »
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got myself a turbo that im going to try and fit, on the stock block until im ready to strip down propley
with a staic comp of 7.2 factory if i add 4 psi ill be around 9:1 and 5psi 9.5:1

ive seen a few running high 9's but not sure on the reliability,

just want a bit more up and go, nothing to wild
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Cheap + Fast = Not Good
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