Compression Test

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May 4, 2006 | 10:45 AM

raptorkingcobra

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Joined: Apr 2006

Posts: 120

From:

Compression Test

I am planning on running a compression test on the GT this weekend, does anyone know what the stock compression should be on these cylinders? thanks

May 4, 2006 | 05:01 PM

raptorkingcobra

Thread Starter

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Joined: Apr 2006

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RE: Compression Test

Wow no responses yet?

May 4, 2006 | 05:08 PM

Dirty Sanchez

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Joined: Jan 2006

Posts: 775

From: Kentucky

RE: Compression Test

Hmmm, I'm wanting to say it should be around 150psi, maybe a bit more. Going on memory here, so don't hold me to it.

May 4, 2006 | 06:38 PM

kartracer55

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Joined: Aug 2005

Posts: 519

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RE: Compression Test

No, but you should look for withing 20lbs between them.... Post up the results, then redo the test after squirting a little oil in the cylinder to try and seal up the rings for the test.

May 4, 2006 | 06:44 PM

Tims 88GT

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Joined: Jan 2005

Posts: 7,657

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RE: Compression Test

150 sounds right

May 4, 2006 | 07:31 PM

settled4automatic

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Joined: Jun 2004

Posts: 613

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RE: Compression Test

Quote:

ORIGINAL: kartracer55

No, but you should look for withing 20lbs between them.... Post up the results, then redo the test after squirting a little oil in the cylinder to try and seal up the rings for the test.

i was tought to compare by % --- more than 20% difference is considered "bad"

May 4, 2006 | 07:51 PM

Liquid_02

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Joined: May 2005

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RE: Compression Test

I got 160 all around when i did mine so about that

May 5, 2006 | 12:16 AM

Mikes Stang

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Joined: Apr 2006

Posts: 87

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RE: Compression Test

Quote:

ORIGINAL: Liquid_02

I got 160 all around when i did mine so about that

That's about what I got on my 1989 donor car, too. I've always heard about 150 was normal. Definitely want to see consistency in all your numbers.

May 5, 2006 | 12:35 AM

Dirty Sanchez

3rd Gear Member

Joined: Jan 2006

Posts: 775

From: Kentucky

RE: Compression Test

Sweet, I was right. Not bad considering I just pulled that number out of my ***!!!

j/k, checked mine awhile back, and they were all right around 150psi or so.