Compression for 02 WRX?

[Mike G.]

Does anyone know the factory stock compression numbers on the 02 WRX?

Mike

 

[WRXtreme]

I believe it is 8.5

 

[Ned Pike]

Does anyone know the factory stock compression numbers on the 02 WRX?

Mike

The shop manual says 8.0:1.

 

[Spudster]

The shop manual says 8.0:1.

CR = 8.0 is correct... 8.5 is too high for a turbo motor that runs 14 pounds
boost.

Or, did you mean what is the normal PSI for a compression test? Common
question after someone cooks an engine by using a manual boost controller.

Spud.

 

[Mike G.]

Yes, that's what I was asking, normal PSI for a compression test.

Thanks,

Mike

 

[Verbs Under My Gel]

Does anyone know the factory stock compression numbers on the 02 WRX?

Mike

Are you looking for the compression _ratio_, or the actual pressure?

 

[Ned Pike]

Yes, that's what I was asking, normal PSI for a compression test.

Thanks,

Mike

Shop manual says 142 PSI to 171 PSI @ 200 to 300 RPM