Never take things for granted

Today a new customer showed up with an Evo 9 GSR. Apparently his turbo blew on the way up to Sepang and he wanted to get it replaced; as he had some plans for more power the engine is being torn down and fitted with upgraded parts as well.

We were a little surprised that the static compression was measured to be about 9:1 instead of the widely acknowledged 8.8:1...

Bore	85mm
Stroke	88mm
Piston dish volume	128cc
Cylinder head volume	440cc
Head gasket thickness	0.95mm
Head gasket bore	85.5mm
Compression ratio	9.021:1