compression?

[1fast97gsx]

I just ran a compression test on my 97 gsx and got 176 176, 175, 175. I thought out of the box they are only 180 - 185 .... damn I am very happy with how this car is holding up with 60k on it.

 

[DirtyBirdRacing]

Hey,

That is awesome, man. Hope whenever I do compression tests they all come out like that, . Must be a good feeling to have no blow-by, or extremely little.

Bill

 

[Groomz]

My 2G Talon I got checked at 170psi across the board with 130K on it. I was damn pleased, and to boot the endplay was in specs. Holy effing shizat Batman, a 7 bolt that hasn't crankwalked!!!

 

[tsunari]

Actually 'out of the box', 2g's are @ 178psi and the service limit is 133. So those numbers are looking real nice

 

[Megags]

I did one on my car and got over 20 psi higher than stock. What does that mean?

 

[tsunari]

Originally posted by Megags
I did one on my car and got over 20 psi higher than stock. What does that mean?

Provided the test was done properly, it could mean . . . .

+ Your head was milled at some point (this would up your compression)

Or maybe even . . .

+ You've got a build up of carbon in your cylinders

one thing to note though, the stock compression for an NT is higher than that of a turbo charged system.

 

[1fast97gsx]

Originally posted by Groomz
My 2G Talon I got checked at 170psi across the board with 130K on it. I was damn pleased, and to boot the endplay was in specs. Holy effing shizat Batman, a 7 bolt that hasn't crankwalked!!!

where do you measure the endplay? Do you have to drop the trans and measure from that side or can you measure it on the pulley side while doing a timing belt change for example?

 

[tsunari]

Originally posted by 1fast97gsx
where do you measure the endplay? Do you have to drop the trans and measure from that side or can you measure it on the pulley side while doing a timing belt change for example?

I personally measured mine on the pulley side last time i did a belt change. My #'s happened to fall right in the middle of the spec range, so I'm assuming that is a correct way of doing it.

 

[1fast97gsx]

ok cool ... thanks

 

[Megags]

Originally posted by tsunari
Provided the test was done properly, it could mean . . . .

+ Your head was milled at some point (this would up your compression)

Or maybe even . . .

+ You've got a build up of carbon in your cylinders

one thing to note though, the stock compression for an NT is higher than that of a turbo charged system.

I know it's higher, it typically runs around 215 psi per cylinder.

 

[CanadianTSi]

My 1997 Talon with 200,000 on it has 180 in all 4 cylinders