What are average #'s for the LS? My boy got an 95 LS and out of the graciousness of my heart I did a comp. test for him today and was quite suprosed by the results...

Cyl1 195 Cyl2 200 Cyl3 150 Cyl4 210

Obviously he has a problem in 3 and #2 hole was filled with oil so when it drained in the cylinder it helped raise the #, but I figured they would be lower on the bone stock low 9:3ish comp LS.... this is an 170k motor BTW.

 

it seem fine except #3

 

Keep in mind it all depends on what guage you use as well.

A snapon one will read vary differently from a MAC or an Autozone brand one.

For instance..
My LS motor bone stock with a fresh rebuild on it did 180psi across the board on a Snapon, and did 205psi on a Autozone brand one (they read high because their diaphrams absolutely suck and tend to hold the psi spikes).

The thing you should be concerned with is the drop in #3. Generally speaking a 5% difference is ok... but thats outside of that range

 

Im curious about this as well. We have similar results. Ive got all my cylinder within the right range of each other (about 180) and my cylinder 3 is like 140.

Oh yea i have a 95 ls as well with about 140K miles

 

# 3 is always a bitch.

My first engine after 70k I had 180 except 3. It was at 150