Honda/Acura Tech Honda tech discussion.

Does compression test #'s tell comp ratio??

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Old Jun 13, 2005 | 11:43 AM
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Hahaha!! I will keep my comebacks to myself to avoid hijacking this poor guys thread.
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Old Jun 13, 2005 | 11:58 AM
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Originally Posted by NChatch
but as you can see the higher the numbers jamie the better the chance of your compression being closer to where it is supposed to be, now was the compression calculated for your motor based of a vtec or non vtec head? headgasket? this is also where some of it gets tricky. but with numbers like 270 i would say its pretty close. was this done with the throttle held wide open while cranking the car over???

funny my civic only reads 155!

Yea that was with the throttle held wide open...Ive got a another ?? for you guys but I'll start a new thread.....
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Old Jun 13, 2005 | 01:17 PM
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Originally Posted by alternativeauto
I almost buried the needle on my compression guage back around to the pin at Zero. 375ish I think, no #'s on that part of the guage. NA is not gay at those pressures ; ) .
I broke a compression guage ... but that was because we did it after i ran the car thru the autox several times ... don't do a compression test when your engine is hot. you break things and of course you don't get the correct reading

My static compression is at 270 on my sohc. We used the compression calculator to find my ratio.
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Old Jun 13, 2005 | 03:14 PM
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Originally Posted by chi town brat
I broke a compression guage ... but that was because we did it after i ran the car thru the autox several times ... don't do a compression test when your engine is hot. you break things and of course you don't get the correct reading

My static compression is at 270 on my sohc. We used the compression calculator to find my ratio.
you're supposed to compression test the motor warm/hot. if not, the rings not being expanded can cause inaccuracies.
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Old Jun 13, 2005 | 05:29 PM
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Using a compression tester to determine compression ratio is not a good idea
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Old Jun 14, 2005 | 01:07 PM
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also your compression is more like 11.5:1 if your using an LS head. with a vtec head itll be close to 12:1
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Old Jun 14, 2005 | 01:29 PM
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How do you know that?....Im not trying to be a smartass I'm just wondering if you remember building this block...It was about 8 months ago
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Old Jun 14, 2005 | 01:42 PM
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yes i remember it....not very well but i remember what pistons were used and i know what compression theyll yield
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Old Jun 14, 2005 | 02:01 PM
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Good...I could not figure out the comp ratio..The guy I got the block from was not to sure on the comp ratio either..Thanks for the info this helps me out alot now I know what I can do to it with out blowing it up
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Old Jun 14, 2005 | 02:18 PM
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Originally Posted by NChatch
still GAY!

when you max an autometer boost gauge and your motor still purrrrrs like a kitten, let me know! hahahahah JK.

Been there,and done that MANY times

Not on this one though hahaha
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