Compression test Sat Night
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OH SNAP!
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Compression test Sat Night
Anyone mind giving me one saturday night when we meet up? After i over heated the other day. Alot of people recommended doing one. I dont have the tools to do one. Anyone mind giving me one?
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Originally Posted by CrypticApathy
Anyone mind giving me one saturday night when we meet up? After i over heated the other day. Alot of people recommended doing one. I dont have the tools to do one. Anyone mind giving me one?
If you did do one with a pistion tester,do you know where the PSI should be?
zero pistons
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Compression test using a piston engine tester:
1. note battery strength. A weak battery will yield low compression results.
2. Remove both lower plugs and wires.
3. remove EGI fuse from engine fusebox.
4. have a friend floor the accelerator pedal, opening the throttle for more airflow
5. insert your tester into the leading hole
6. hold the valve on the side of the tester open
7. have your friend crank the car over for 5+ seconds.
8. observe the needle bounces. You should see 3 in succession without skips, even bounces, in roughly the 30-35psi range.
9. let out on the valve now, and let the tester reach an overall compression value for all 3 faces(highest of 3 will be displayed). 115+ is like new, 100-115 is healthy, 90-100 is getting weak(1 year or less in most cases) below 90 could blow at any moment.
10. repeat for opposite rotor. Note difference in overall compression between rotors, which should be no more than 20psi max.
1. note battery strength. A weak battery will yield low compression results.
2. Remove both lower plugs and wires.
3. remove EGI fuse from engine fusebox.
4. have a friend floor the accelerator pedal, opening the throttle for more airflow
5. insert your tester into the leading hole
6. hold the valve on the side of the tester open
7. have your friend crank the car over for 5+ seconds.
8. observe the needle bounces. You should see 3 in succession without skips, even bounces, in roughly the 30-35psi range.
9. let out on the valve now, and let the tester reach an overall compression value for all 3 faces(highest of 3 will be displayed). 115+ is like new, 100-115 is healthy, 90-100 is getting weak(1 year or less in most cases) below 90 could blow at any moment.
10. repeat for opposite rotor. Note difference in overall compression between rotors, which should be no more than 20psi max.
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Damn I left my compression tester at work or, I would have let someone barrow it tonight....
eats babies
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110 is in great condition, 100 is pretty alright
80-90psi is flooding problems but once it gets below 80 it's toast.
I got those from Kevin at RR, he's pretty accurate when it comes to things like this as he rebuilds rotarys as a living.
80-90psi is flooding problems but once it gets below 80 it's toast.
I got those from Kevin at RR, he's pretty accurate when it comes to things like this as he rebuilds rotarys as a living.
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Joined: Sep 2004
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it depends on the ports also, ive had bridgeports and streetports in the low 70 psi and running strong and lasting a long time.So it aint always accurate,its a round about to see where your engine is.Unless its a drastic change then your in trouble.
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