18-1 compression cranking pressure

[6.2 turbo]

Did any one do a compression test on an 18-1 motor ? If so what was the psi? I got a compression tester,and want to check my 6.2,and see how much lower it is than 18-1. I guess stock is 400 psi?

 

[6.2 turbo]

I checked #1cyl it has 280 at 3 compression strokes and 325 max with more cranking. I ran the motor for a few minutes first.

 

[6.2 turbo]

I checked the Tahoe it has 450 @ 3 commpression strokes and 500 @ 5 strokes. Engine temp 130 degrees.

 

[6.2 turbo]

I checked the Tahoe compression,325 psi @3 compression strokes,and 350 psi max. This is with the pistons .035 in the hole. It smokes white a lot,and I can't seem to get the timing right. I estimated 18-1 but it seems like it's lower.

 

[tanman_2006]

Interesting info, IIRC 250 is rering range?

 

[6.2 turbo]

My 6.2 has 220 psi,with pistons shaved .090. This is less than my BBC that has 12.5-1.

 

[Husker6.5]

For 18:1 you should be around 270 psi.