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Any guess on my compression ratio?

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Old Nov 10, 2014 | 11:02 AM
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Default Any guess on my compression ratio?

I did a static compression ratio on my lsv and results where between 240-250psi on all 4cyls....i was thinking around 12.1 maybe?
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Old Nov 10, 2014 | 08:03 PM
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You did a dynamic compression test. Static just takes cylinder volume , combustion volume, and gets a ratio between bdc volume and tdc volume.

A compression test like you do with a gauge is a dynamic test since it also takes the camshaft timing into consideration, which can change the overall compression.
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Old Nov 10, 2014 | 08:11 PM
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My h22a gets 260 across and has 10.6
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Old Nov 11, 2014 | 02:36 AM
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Default Re: Any guess on my compression ratio?

It might help if you list your setup.
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Old Nov 11, 2014 | 04:03 AM
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Default Re: Any guess on my compression ratio?

14102947398578120948.44 : 1
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Old Nov 11, 2014 | 04:06 AM
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Default Re: Any guess on my compression ratio?

Will he be ok on 93???
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Old Nov 23, 2014 | 10:45 AM
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Default Re: Any guess on my compression ratio?

Setup is

B18b block
Weisco 12.1 pistons
Je rods ...stock LS length
Stock B16 head
Cosmetic LSV headgasket
Bloxs Flat Racing Valves
Supertech Valve Springs
Stock LS crank
Blox Type C cams
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Old Nov 24, 2014 | 07:14 AM
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Default Re: Any guess on my compression ratio?

My guess would be right around 12:1 since you specifically ordered and installed 12:1 pistons
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Old Dec 22, 2014 | 12:31 AM
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Default Re: Any guess on my compression ratio?

Originally Posted by F22Master
Will he be ok on 93???
I run e85
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Old Dec 22, 2014 | 12:32 AM
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Default Re: Any guess on my compression ratio?

Originally Posted by turbodcxbro
My guess would be right around 12:1 since you specifically ordered and installed 12:1 pistons
Might be higher since i run flat valves
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