[rcoe]

Well after 3 track days and 8k miles decided to swap out the plugs and did compression tests on every cylinder just to see how it is looking now thatthe new engine has 10k on it.

Plugs all looked good.

Compression test numbers look good, I think. These numbers were the average of 2 tests and #1 was done first when it was cold and dry.

#1 175
#2 185
#3 180
#4 183
#5 180
#6 188
#7 179
#8 185

Still need to figure out why I am getting bank1 O2 sensor codes at times, get it for either side but completely random. Might go a week without, then just when I am thinking it pops up again. Think I will go back to GM ones since these are cheaper ones from Oriellys.

[Hotwheeltat]

Possible exhaust leak

[SSDan]

I would think those compression numbers look good. There is only a 13 psi spread - top to bottom.

[s346k]

what's the engine setup? i'm guessing it's low compression given the compression values.

[rcoe]

Originally Posted by s346k

what's the engine setup? i'm guessing it's low compression given the compression values.

Not sure exactly. It was a full engine build with all forged internals setup to run boost, Gen 5 Performance Block, Callies Rods, Diamond Pistons, ARP Head Bolts, ARP Main Studs, Trunnion Kit, King Race Bearings, and GM Heavy Duty Timing Chain. Supposedly a 20k build for the short block. When I first purchased it I brought it back to the shop that built it to give it a once over and he showed me the invoice on the computer wish I had had him print it for me, but thought they were going to be doing more work to it in a couple months.

I am assuming it is running LT4 compression levels. Was very glad to see they all looked good.