Compression problems m137.960

[limpan200]

Hi, im helping my friend whit his track day car. Magnus Jinstrand's V12 Shelby Cobra Kit Car - Hot Rod Magazine

He's been having problems with the engine, it's a m137.960 from a cl600 -01 to -03.
The biggest problem is that there is a significant compression difference between left and right cylinder bank. The driverside bank has lower copression. The shutoff valve system and vanos is not conected to the EMS (vems standalone).

Is there anyone that has the same engine that has done or can do a compression test so we know if this is the way the engine is supposed to be.

Right now he has fitted tuning camshafts which was supposed to eliminate the problem but the result was just minor diffrence from the original.

If there is anyone that knows a lot about these engines we would very much whant to get in touch with you as information is hard to come by.

Best regards Linus