Cam timing in the 10V turbo motor

[Ameer Antar]

I was wondering if anyone ever had any experience with the cam timing on the 10V turbo motor. I think I may be off by a tooth or two. These are the symptoms I've noticed:
 
1. poor idle / cold driveability
2. loud exhaust
3. power mostly in higher RPM even with boost; slow pickup
4. poor gas mileage (18-19 avg.)
 
The engine is in excellent condition: rebuilt motor, rebuilt fuel components, replaced all vac. hoses, and tested all sensors and wiring. I'm going to take a look at the timing belt tomorrow and see if it's off (was going to swap in an MC cam anyway). Could cam timing be the cause of these symptoms? Is there any sense to try different timing positions while I'm in there? How about an adjustable cam gear? Any wisdom on this is much appreciated.
 
-Ameer