2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

100psi on both rotors at 125k?

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Old Jun 16, 2007 | 04:36 PM
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Bob Boberson's Avatar
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From: Newnan GA
100psi on both rotors at 125k?

I did a compression test on my motor today, admittedly the motor was not warm, but I got between 95-100 psi on both rotors for all three pulses. This is much better compression than I thought it would be, and suspect it was rebuilt at some point. My oil pan has a mazda reman. sticker on it as well, but I thought nothing of it because there were two stickers. Do you guys think it may have been rebuilt?
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Old Jun 16, 2007 | 04:43 PM
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It's really too hard to say just on compression numbers. Just be glad they're good!

I have six identical 95psi pulses on MY original engine and the mileage is basically twice what yours is.
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Old Jun 16, 2007 | 06:14 PM
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From: Boylston Ma
i checked mine not to long ago and i got 110-120 on both rotors and mine has
132k
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Old Jun 16, 2007 | 06:41 PM
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are you guys NA or t2?
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Old Jun 16, 2007 | 06:56 PM
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gotta be n/a lol
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Old Jun 16, 2007 | 06:57 PM
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initial D is REAL!'s Avatar
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Yeah, jsut checking. Haha
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Old Jun 16, 2007 | 08:59 PM
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Must be those super high compression rotors from ebay! :P

JK, Those numbers are great! You did modify the check valve in the compression gauge or atleast tapped thre pressure relief button in right? If no, then you could get higher then norm compression numbers.
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Old Jun 16, 2007 | 11:19 PM
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From: Newnan GA
Originally Posted by RotaMan99
Must be those super high compression rotors from ebay! :P

JK, Those numbers are great! You did modify the check valve in the compression gauge or atleast tapped thre pressure relief button in right? If no, then you could get higher then norm compression numbers.
Yea, just held in the pin. I was pretty surprised, I have been thinking about the N/A->TII swap, but I think I may just end up selling my car and buying a TII. I guess I can wait for a while on that, meanwhile I've got emissions right around the corner...Oh well, good news, thanks for the responses guys.
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