Cylinder compression Q

[Junior Samples]

As I am still awaiting the arrival of my scanner I decided to check my cylinders and my readings are all 130#s

Now I read on GN.org they should be around 150?

The Block is 30 over and with only 2000 miles on motor, if readings are down that much although consitant....I may have to pull the damn motor this winter and do it right because IM really starting to question the local Mr smartypants socalled GN guru who built the motor.

I guess it started with finding the Y restrictor on wrong.

Anyway what should my readings be per cylinder?


Mike

 

[cruzn57]

some things to concider

cam shaft duration and overlap will affect cranking compression. also did you have the throttle wide open?
before tearing it apart, preform a leakdown test to see if anything is leaking.
and where,
good luck

 

[Junior Samples]

re

Im running cam from poston cat, mild 107 little over stock

took test with throttle open, pipe off and no fuel.

I am consistant in all cylinders but my leak down is next.