So before I really start cranking on my car, I thought I'd do a compression test before even thinking about ordering a turbo kit. I came up with the results of 150-150-142-150 across the cylinders 1-4 after turning the engine over 6 complete revolutions and keep in mind the engine had already cooled down to 147 degrees by the time I had popped the hood and pulled the fuel pump fuse to get rid of all fuel so it was not at optimum operating temp. So what is a typical cylinder pressure on the LNF, or better yet, whats the GM spec on cylinder pressure for the LNF. I was thinking the GM spec was 150 so I suppose I met the tolerance on pressure for all cylinders. Could someone please verify the optimum cylinder pressure for the LNF?

 

180 lol

 

Oh ****, lol. Guess its time for a bottom end replacement or maybe my valves aren't seating correctly due to carbon buildup or something...... I WAS thinking it was 180 for a bit but had second thoughts when it maxed out at 150 pretty much across the board.

Edit: I'm gonna pull the injector fuse tomorrow and see if maybe fuel was still getting in the cylinders plus I will try and do it in the daytime when the engine won't cool down as quickly. I really don't want to do an engine build in the cold tbh, lol. I don't mind the cost because it will pay off just would much rather it be this summer.

 

mine is around 155 across the board after my build

 

your compression is fine. there is only 8psi variance.
6 cranks may not be enough to get a full reading. I crank until the gauge doesnt go up anymore, and I also have a battery charger connected to keep the cranking speed up and consistent.

 

Thats what I was thinking, but wasn't sure because the LNF has direct injection.

Well, guess I'm good then. Was a lil afraid I was going to be doing some serious work on the balt this winter and my buddy still isn't done with his lift and his v6 civic yet.

 

150 - 160 is pretty typical for the LNF. I think you are in good shape. If you use a tester with a longish hose like 12-16" crank until it stops rising.

 

Your good. Buy that kit.

 

Sweet, thanks! Was my birthday today so thats great news!