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Cranking compression of a 8.5 to 1 motor?

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Old 08-08-2007 | 07:04 PM
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Default Cranking compression of a 8.5 to 1 motor?
What are you guys getting for cranking compression on your turbo motor? Give compression ratio and cranking compression.
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Old 08-08-2007 | 07:30 PM
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I'm around 8.5/1 and getting 145 psi. Strongly depends on cam timing, though.

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Old 08-08-2007 | 07:59 PM
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exactly, depends on the cam. mine is 10:1 and gets 155 psig.
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Old 08-08-2007 | 08:19 PM
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I know it depend on the cam but it seems like most of the turbo crowd is running close to the same specs. I was just curious. I have a 8.5 to one and am getting 190psi.
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Old 08-08-2007 | 08:36 PM
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Originally Posted by phildo
...I have a 8.5 to one and am getting 190psi.
Sounds like you have a small cam, tight LSA, or alot of advance.
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Old 08-08-2007 | 08:51 PM
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Originally Posted by engineermike
Sounds like you have a small cam, tight LSA, or alot of advance.
232/228 .600/.600 115+2....

I am starting to think this thing is install way advanced. Might explain the power problem or lack there of. Installer said it was degreed but I am finding evidence to the contrary.
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