RX7Club.com - Mazda RX7 Forum

RX7Club.com - Mazda RX7 Forum (https://www.rx7club.com/)
-   2nd Generation Specific (1986-1992) (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/)
-   -   Would like expert opinion on my compression test results. (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/would-like-expert-opinion-my-compression-test-results-101431/)

niner 07-31-02 07:30 PM

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

scathcart 07-31-02 07:45 PM

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...)


All times are GMT -5. The time now is 01:57 PM.


© 2024 MH Sub I, LLC dba Internet Brands