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

Would like expert opinion on my compression test results.

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Old Jul 31, 2002 | 07:30 PM
  #1  
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From: charlotte
Would like expert opinion on my compression test results.

89 TII jspec engine

front rotor: 3 even bumps 90-95psi w/ needle pushed in, builds up to 110psi max without needle pushed in

rear rotor: 3 even bumps ~95psi, builds up to 135psi

i know the FSM says it should not go under 80psi, I also saw the rotary engine rebuild video that says it should build up to 120psi

battery was in good charge and i was using a nice MAC tool guage b/c my craftsman one is a piece of crap

so is this engine good to go? or should i condemn it and freshen it up inside?

edit: forgot to mention that i have gotten the engine to run a few times. it did not run well, but it would hold an idle, sometimes. and it would not rev over ~3000rpms. i dont get to work on it but about once a week b/c its half an hour away and i am also sorting out other problems w/ it right now

Last edited by niner; Jul 31, 2002 at 07:34 PM.
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Old Jul 31, 2002 | 07:45 PM
  #2  
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Joined: Dec 2001
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From: BC, Canada
Re: Would like expert opinion on my compression test results.

Originally posted by niner
89 TII jspec engine

front rotor: 3 even bumps 90-95psi w/ needle pushed in, builds up to 110psi max without needle pushed in

rear rotor: 3 even bumps ~95psi, builds up to 135psi

i know the FSM says it should not go under 80psi, I also saw the rotary engine rebuild video that says it should build up to 120psi

battery was in good charge and i was using a nice MAC tool guage b/c my craftsman one is a piece of crap

so is this engine good to go? or should i condemn it and freshen it up inside?

edit: forgot to mention that i have gotten the engine to run a few times. it did not run well, but it would hold an idle, sometimes. and it would not rev over ~3000rpms. i dont get to work on it but about once a week b/c its half an hour away and i am also sorting out other problems w/ it right now
Sounds good to me. A little surprised you are building so high on the rear.

My engine is brand new and hardly makes that (but I am ported...)
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