Compression question after build and break-in?
03-02-10, 09:55 AM
#27
Khris, those readings come out to F 103/103/99 R 99/95/102 at 250 rpm. That's on a stone cold engine too, so the readings would be lower if thoroughly warmed up as it should be.
Those are new rotor housings? Who built it? For new housings and apex seals that's not horrible for a completely fresh build, but not great either.
Those are new rotor housings? Who built it? For new housings and apex seals that's not horrible for a completely fresh build, but not great either.
Khris
03-03-10, 02:53 AM
#31
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I wouldnt really worry much about compression numbers unless your car is having major problems starting due to low compression. Like stated above, just keep driving the car and dont worry about it.
03-03-10, 08:24 AM
#32
Ok gent's got my compression result, it's a rebuilt with new housing and everything else is oem (new) accept for R.A Super Seals and Pineapple Racing HD water seals and most important o miles on the engine just about 1:00 minutes total running since it was put in.
The compression was done with Mazda digital compression tester.
Front Housing Result:
Rpm= 276
1=7.9 kpsi
2=8.0 kpsi
3=7.6 kpsi
Rear Housing Result:
Rpm= 263
1= 7.2 kpsi
2= 6.9 kpsi
3= 7.4 kpsi
I was too lazy to look up to psi I thinkt he book call it kpsi? maybe some can chime in.
Khris
The compression was done with Mazda digital compression tester.
Front Housing Result:
Rpm= 276
1=7.9 kpsi
2=8.0 kpsi
3=7.6 kpsi
Rear Housing Result:
Rpm= 263
1= 7.2 kpsi
2= 6.9 kpsi
3= 7.4 kpsi
I was too lazy to look up to psi I thinkt he book call it kpsi? maybe some can chime in.
Khris
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