140,000 mile LS1 engine leak down results

[TXsilverado]

expected the worst, and got the best a little history behind the motor. previous owner ran this motor with a 237/242, .603"/.609", 113 LSA and a 15o shot of nitrous in his 99 camaro.

since ive had it, its had a 226 cam with patriot stage 2 heads and a 231/239 .617/.623 111+2 lsa cam with a 150 shot. this motor has had atleast 200lbs of nitrous blown through it.

and for the leak down results...

cylinder 2 7% cylinder 1 7%
cylinder 4 5% cylinder 3 8%
cylinder 6 7% cylinder 5 6%
cylinder 8 7% cylinder 7 9%

i am happy to say the least. it just shows how much proper maintenance and a good tune goes. i would expect these numbers froma 50,000 mile motor...not mine! props to charlie wheatley and allen nelson who are the only 2 to touch this motor. i did find one issue though. i guess this is what i get for running about 10 bottles of nitrous through on the same set of plugs plugs lol.