Hello, new to the site this is my first time posting anything. I just wanted to know if my compression numbers are good cause I want to go turbo for more power.

heres a pic of the numbers the shop got when tested



cylinder 1 got 195
cylinder 2 got 210
cylinder 3 got 195
cylinder 4 got 180

 

If you can afford a rebuild, might as well do it for piece of mind. If you're a risk taker you can can run it and see how long it takes to pop it.

 

Numbers aren't bad but cylinder 4 looks a little low compared to the highest one.

 

the compression numbers show your more than 15% variance between cylinders, anything more than 10% is considered bad. the lead down of 23% is terrible, and the note indicating its coming out the vent on the valve cover indicates bad rings.

its toast, time for a rebuild before you cause serious damage.

 

the numbers are not good, well some of them are. Like sharkey said cylinder 4 is shot, looking like bad rings... add boost to that and it won't be long before he posts asking where to find a fresh LSJ or looking for rebuild info.

 

depending on the condition of the bores it may need sleeved

 

I’m going to get a gen 3 short block with #82 springs before I add more boost cause I’m not even fully tuned still on the canned tune

 

lsj block is a better choice and stronger but in all reality i would just run you cant hurt it much more then it is now

 

Wait, the stock lsj block is stronger than a gen 3 block? But I also wanted it to last since I heard the gen 3 is more reinforced and better for higher hp

 

the stock block record is 585hp and that would be crank rods and pistons