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compression test with motor not in the car?

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Old Jul 28, 2010 | 02:45 PM
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compression test with motor not in the car?
yes I have searched, didnt come up with the anwsers i wanted. I pulled a motor out of a turbo2 a month ago that didnt have a tranny, can I test the compression without it in the car?
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Old Jul 28, 2010 | 02:47 PM
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without a trans and a starter i don't know how you would get the engine cranking fast enough to get an accurate result.
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Old Jul 28, 2010 | 02:52 PM
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yea same lol, looking inside the exhuast ports the housings look good and all the apex seals, the turbo didnt show any signs of anything going threw it
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Old Jul 28, 2010 | 03:02 PM
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If the engine is bolted to a stand, could you not turn the flywheel with a big socket or something?
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Old Jul 28, 2010 | 03:10 PM
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i was thinking of using an electric impact gun to spin it up fast
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Old Jul 28, 2010 | 03:17 PM
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NOOOOOOOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!

Stop both of you!

In order to get a proper reading the engine needs to spin at a minimum of 250 RPM.
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Old Jul 28, 2010 | 03:23 PM
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alright haha, maybe ill take a weekend and just toss it into my car
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Old Jul 28, 2010 | 06:20 PM
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You'll need a TII starter + TII bell housing / TII transmission + battery and cables

OR

NA starter + NA transmission + battery and cables
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Old Jul 28, 2010 | 06:24 PM
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I used my right angle drill and a socket
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Old Jul 29, 2010 | 08:16 AM
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If one of you guys doesn't mind clarifying, why do you need to spin it at some minimum RPM? What makes the compression different at lower speeds?
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