Compression Test: 1998 Accord with 165k+nitrous

[HandoEX]

I did a compression test on my Accord tonight. The motor has 165,000 miles and has seen about 12-15 bottles of nitrous (55-75 shots) within the last 25,000 miles. Compression came out at 175-190-190-195. My buddy guessed 145s and I was hopeful for 160s so obviously I was very happy with the results. Seriously, these motors are freaks!!! Time for more abuse

 

[N4TECguy]

Nice...I did a compression test at 118K all stock, same results...200/190/185/190

 

[FallenAngelHIM]

what exactly do those number mean and how do you know where they should be?

 

[HandoEX]

what exactly do those number mean and how do you know where they should be?

The shop manual says that 135 is the minimum and there shouldn't be a variance of more than 28psi from cylinder to cylinder. The numbers are a good indication of the overall health of a motor. I honestly thought this motor was on it's last leg.

 

[FallenAngelHIM]

wait, so those numbers are PSIs?
so each cylinder (yours) have about 180-200 POUNDS of air per square inch?

 

[6THGEN_AI4]

good numbers...

 

[Totalimmortal]

Im scared to do mine

 

[DarkSideAccord]

piston 1 is a lil off from the rest, but no biggie i guess