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PRC Stg 2.5 5.3l Heads?

Old 09-02-2005, 05:36 PM
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Default PRC Stg 2.5 5.3l Heads?

Anyone know the compression ratio of these heads?

PRC Stg 2.5 5.3l Heads
Manley Intake Valves (2.04)
Stock 1.575 Manley Exhaust Valves
Old 09-02-2005, 05:42 PM
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with stock thickness gaskets it should be around 10.8:1 unless they are milled
Old 09-03-2005, 04:47 PM
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depends on what the final chamber volume is. i know Brent at TEA said there 5.3's usually end up 63-64cc.
Old 09-03-2005, 06:12 PM
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they're 62 cc


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