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  #1  
Old 03-09-2007, 05:39 PM
srickss srickss is offline
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Default 68 GTO Compression
What should compression be on a stock 68 GTO engine YS code?

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  #2  
Old 03-09-2007, 05:48 PM
MORTIMER MORTIMER is offline
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Quote:
Originally Posted by srickss
What should compression be on a stock 68 GTO engine YS code?

10.75:1 was stock

Mortimer

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Old 03-09-2007, 05:56 PM
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Jeff Walker Jeff Walker is offline
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Quote:
Originally Posted by MORTIMER
10.75:1 was stock

Mortimer
This is advertised compression. I think I read somewhere that the actual compression ratio was a bit lower, but still over 10.00:1.

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  #4  
Old 03-09-2007, 10:27 PM
srickss srickss is offline
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Default 68 GTO Compression
I was looking for the psi for a compression test, not the compression ratio. Any help would be appreciated. Thanks.

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  #5  
Old 03-12-2007, 02:11 PM
gto4evr gto4evr is offline
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Pretty sure it's 125-165 range.

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  #6  
Old 03-12-2007, 02:40 PM
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Jack Blum Jack Blum is offline
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I have a 0.30 over YS 400 with stock 16 heads and the 69 069 RAII cam. Typical runs around 150-155 psi. Remember to test when hot.

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