INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

compression question

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Old Jan 20, 2008 | 10:51 AM
  #1  
jkwalkercchs's Avatar
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From: morristown/newport,tn
Arrow compression question

Compression: 64cc - 10.23, 66cc - 9.56, 70cc - 9.77
Compression Height: 1.315
Bore: 3.902
Rod: 6.125
Pin Size: .927 x 2.500 - 118 Gram Pin
Ring Grooves: 1.5mm 1.5mm 3mm
3.0cc Valve Reliefs
Manufactured from Forged 2618 High Strength Alloy.

im totally lost any help would be appreciated
my heads are 57ccs so what would this equal??
whats the max comp ratio on pump gas
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Old Jan 21, 2008 | 08:39 PM
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From: richmond va
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right around 12.2:1 good for na
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Old Jan 21, 2008 | 08:51 PM
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Derek @ EDO's Avatar
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http://www.c5frc.com/calculators/Com...Calculator.htm
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