question on compression cranking readings

[jimbos56]

Question is on a 454 bbc stock bore 4.250, stock stroke ,118cc cumbustion chamber aluminum heads,block zero decked, .040 quench, stock GM LS6 forged .100 domed pistons.cam is a bullet racing mech solid lfter dur. @ .050 is 251/259 seperation 110. grind # CHB 277/289-10F. degree intake lobe to 104 icl gross valve lift .620. cam indexed straight up.

compression test readings 125-130 on all cylinders.
Are these readings about right for this setup.

I apreiciate you posts, thank you.
Jim

[desert dog]

cylinders should be fairly even. Within about 10 %. You are well in that area. It is more about the seal of rings and valves than set up.

[jimbos56]

Thanks Desertdog.

[Mike52]

Jimbo, questions regarding your testing method. Do you have ALL of the spark plugs removed, is the air cleaner/filter removed AND is the throttle being held at wide open when you are spinning the engine over?

Mike

[jimbos56]

Jimbo, questions regarding your testing method. Do you have ALL of the spark plugs removed, is the air cleaner/filter removed AND is the throttle being held at wide open when you are spinning the engine over?

Mike

Yes Mike that is how i did the test.I was told that me being at 4800ft that if i were at sea level the readings would more like 150 psi.
Thanks