rb30 compression

Submitted: Wednesday, Mar 05, 2008 at 19:25
ThreadID: 55217 Views:2290 Replies:5 FollowUps:0
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My 93 3l Patrol is playing up & I was suspecting a leaking valve problem, however on doing some dry & wet compression testing I encountered some unexpected results:
DRY
1 2 3 4 5 6
145 170 175 165 180 170

WET
1 2 3 4 5 6
170 185 200 180 185 185

This seems to suggest worn rings in cylinder 1.

Can anyone tell me what the compression should be in an RB30 carbi motor? I would also appreciate any other suggestions. This motor misses & sometimes stalls, uses fuel & lacks power. I have replaced all leads, plugs, rotor & dizzi cap and also tried various timings. This is a dual fuel car but it runs even worse on gas.

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