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1058829 oops. sorry, that was a Chiltons manual. :-O [addsig]

1058830 Took it around the block last night with the stock air box removed just for a minute. Bad thing to do, but it proved one thing: big time restriction in the intake tract. I think my cam is trying to suck through a straw. Looks like a K&N and Rusty's cat back is in order.[addsig]

1059178 Hmmm. 170 psi kinda makes me wonder about the machine work I had done. The head was shaved but the block was not decked. I am wondering about my compression now, 170 psi seems awfully high. A wrong deck height could also affect lifter preload and possible keep the valves from fully...

1058735 Well, after scanning my factory repair manuals, and even my old Haynes (thppt!junk) manual for some standard compression readings on my 89 4.0L TPI, I have concluded that they are not there even though both publications make reference to em. I have 170 psi across the board, which SOUNDS...

1058831 Hey guys, trying to open up my 4.0's exhaust and intake some and let my cam work right. Summit racing has Dynomax Super Turbo cat back set up for only 86 bucks. Hella deal compared to Borla price$. Rusty has his cat back set up for 139, but uses Dynomax Ultraflow's or Flowmasters (your...

1059184 Having some difficulties with my rebuilt 4.0. Its in a 89 XJ with automatic trans. and RENIX MPI. Got good compression, but power seems lower than before the rebuild. Engine does not want to fire right up first revolution when trying to start, but eventually fires and runs albeit not as...