LOL at irresponsible.
2200lb inertia drum runs with me closely watching things while running quality fuel is not irresponsible.
It is true changing pulies changes the efficiency of the blower. By how much depends on the change and you can read the compressor map to get an idea of this change. You could actually increase the efficiency and make more power per lb/boost in the right circumstance, but you can easily go the opposite way as well. Having the wastegate post intercooler does not help with effiency of the intercooler either.
I think this is a fine setup for those that want more TQ and LOWER peak RPM, but take an A6 that's shifted at 7600 (because it makes peak power at 7400+) and you will greatly effect ET/MPH by going with a wastegated setup as Peak RPM will be significantly reduced, which means gear and shift point changes, not simply a bolt on and go run faster. Sure, power will be increased up to that point, but why limit RPM? And if you want more TQ why not go with a possitive displacement blower or Turbo?
Centrifical blowers are the only supercharges that gain boost with RPM and IMO that's their only benfit over a TVS or Whipple, so why take that away from them?
to say that 783 rwhp on a stock engine is perfectly safe is absolutely ridiculous.
I still don't understand how you cannot grasp the concept here. It's not a bolt on and go. You need a retune
1) Because the load on the low end torque will be too much with the same timing
2) The car is going to need more fuel.
As far as limiting RPM you are not limiting RPM. As far as how it will perform, It's going to perform better.
We tested the setup and picked up OVER 5 MPH and .37 in the quarter with .1 less peak boost. dtony with a less efficient head unit, ran over a tenth better in the 1/8 mile.
The other guys that haven't hit the track or dyno, but tuned on the street have told me the cars are ridiculously quicker than they were before.
If you think it's safe to run 12 or 13 psi of boost, then your customer do not need this setup. They can simply pulley down to a 3.33 and go get after it for the week or 2 that their engines stay together.
This setup is not for those people. For crying out loud, the car you just tuned was making 550 rwhp and now it's making nearly 700 with equal boost, and your saying the car won't pick up in the 1/4......... LOL. That car made peak power at 7500, now it makes peak power at 6500, but I can guarantee you the car runs a hell of a lot quicker than it did before....