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AFR 225's on 383

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Old Mar 20, 2011 | 09:55 AM
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Default AFR 225's on 383

i have the chance to buy some used AFR 225's that have been milled to 59cc.
I have not bought my forged rotating assembly yet for the 383 but i was going to go with a -2cc piston. will my compression be to high? I have some guys saying it will be fine on pump gas and others that are saying race fuel only. I know my options are either a thicker head gasket or maybe -4cc pistons. What do you all think? Im going to run a custom grind cam so i dont know what size yet till i have everything bought. I just hope the best cam spec will be one that sounds like its sick and dieing with a cough. Also might see some N2o in the future.
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Old Mar 20, 2011 | 10:44 AM
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I don't know what your compression height is but at 1.120 your CR with -2cc pistons would be around 12.2:1 and with -4cc'ers it would be 11.9:1 or so. I'd go with the -4 pistons, it gives you a little more safety margin. I fact, I'd go even less than that, but that's just me.
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Old Mar 21, 2011 | 06:51 AM
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anyone else know a bit about this?
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Old Mar 21, 2011 | 07:40 AM
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I have the 59 cc PRC heads, and on my build, after getting advice from TSP, I went with an -8cc wiseco piston set to keep compression safe for pump gas.
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Old Mar 22, 2011 | 03:44 PM
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can you PM me your cam specs? any your track times of you have any!!
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