Compression question.

[SJ636]

Is that a typo? I believe it should be 4.5 thousandths, not 45 thousandths.

Yes you are correct, not 45 thou ahha. Sorry

 

[feartheride]

were the clearance in the cyl checked by yourself or someone else..I know when I do it I always double check.were they measured again after honing.

What were the specs on out of round and taper

 

[MileHighJSC]

Air temp/humidity is generally the same, its all done in a heated shop so it shouldnt be far off. This is a diff comp guage tho, a new one I picked up (that I tested on another engine too and it worked fine) same head gaskets but different base gasket. The gasket I used last year was .020 thou I believe, and this time im using a base gasket from the WSM top end kit. I never did check the thickness of it.. I kinda assumed it was a standard .020 thou gasket. Last year I bought the cyl from godoco on the x, he had pistons with it that I used. This time im running new WSM pistons. Again I have not ran the engine yet, or seated the rings but do you think comp will go up that much? Cuz it should be in the 180 range rght?

If you only had 145 last year, and that gauge was correct, and the rings were good, base gasket was stock. Then the exhaust port timing was changed quite a bit to get a 145 reading. once the port timing has been raised that much, it becomes much more difficult to estimate cylinder psi for us, when we don't have all the port spec's for your cylinder.
All the things I told you in previous posts must be checked before going forward. Try a few different gauges. Be positive about the base gasket thickness, it will make a huge difference in the cylinder pressure. I have done alot of testing and not to be rude but, I believe Wsm makes crap parts, I would not put them in my motor if you gave me new ones for free, you need to measure them and see if they have the same displacement as your old ones. CC your domes, someone may have mis-marked them at the factory, or someone else may have machined them and changed the cc.

 

[SJ636]

I finally figured it out. The Comp tester I was using was fine, but I was using the wrong size adaptor. The adaptor was the correct thread but at the top end of the threads it was not wide enough to seat the oring properly so pressure was blowing by the oring. Didn't realize it till I put some oil in the cylinders and saw it blowing past the oring. Put a different adaptor on the comp tester and it reads 170psi per side. Thanks for all who responded and helped me out. I appreciate it!