Stu,
CR is 8.7 engine is 2300cc.
Not exactly sure what you mean by turbine ratio. Can you explain?
It has a .63 exaust housing with a stock 4x4 turbine wheel if that helps?
Other things that you night want to know:
The engine has quite an oversquare bore/stroke ratio and runs a fairly large 93.5ish mm bore.
It once was NA of course so still has NA cams with loads of overlap. Chain driven cams so vernier wheels are expensive/rare/tricky for us to make.
I think the NA cams might contribute to a relativly low dynamic CR?
Cheers.
Engine has quite a high