170F at the airbox (IAT)? Something wrong there. Restricted?
10 psi is just slightly above stock factory warranted boost and although many of OUR Viper engines have too much compression (not the blower) for 10psi, you can (and usually do change the pistons to run higher boost. /the 98s run about 9.6 to 1 and the Gen 3s run 10.2 to 1 compression. THAT's the problem, not 10psi. My Ross pistons are 9 to 1 and that means that it can run 10psi without w/m and no damage. My stock 92 Turbo 3 engine runs 8.2 - 1 compression forged pistons stock with 9psi boost, also stock. A manual boost controller alone will allow a boost setting of 14.5 psi all stock with reliability and no detonation.
The mustangs used a Whipple and NOT an autorotor. At Saleen we were treated to the engine shop, the blower shop, etc. The blowers are encased in the intake manifold, not bolted on top like a Roe. The Saleen blowers are under the intake runners. I believ that the Ford GT uses a Whipple twinscrew blower. Same style of blower, but not the same case etc.
Whipple Industries
As stated previously, the Vec 2 and 3 allow indiviual fuel trim adjustments for EACH cylinder and rich cylinders would be the fault of the tuner (get a new tuner). The earliest Roe blowers (like mine) ran rich to 2 cylinders and Sean built a baffle that solved that problem so if he has an OLD RR blower, call Sean for the baffle to solve that problem.
One reason Sean chose the Autorotor (same as Kenny Bell) blower is because of it's fantastic reliablilty. These blowers have run more than a 100,000mi. Mine was installed within a couple thousand miles of new and now has 42,000mi. on it. I pulled the blower last summer to port my heads and everything looked brand new.
The twin screw is the most efficient type of blower made. Check out the Whipple site I linked above.
Ted