Quote:
Originally posted by Lux
Centrifugal works totally different than a twin-screw. You get hardly zero boost below 4K rpms. Max boost occurs at redline. And if all you're getting at redline is a low 6psi or something, then that's actually less stress than a PD's constant boost. How fast they spin vs a PD is irrelevent.
So you're saying there are 996 motors running over 9psi of boost on bone-stock internals running high compression? I'm skeptical.
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I didn't say the 996 motors are running twice as much boost, I was saying that they are running centrifugal blowers which have the capabilities of spinning at a much higher RPM then PD blowers. How can you not say that a blower spinning at 60k RPMs could not present more of a problem then spinning at 40k RPMs. With centrifugal blowers you really have to make sure that the belt tensioner keeps the belt tight around the supercharger pulley to avoid slippage. Belt slippage has been known to cause major problems in a reliability stand point when it comes to supercharged vechiles. You are correct about maxium boost at redline making for a reason that a centrifugal blower to be more reliable. And, yes I am aware of all the differences between the 3 different blowers.
At one point of time a few months ago, I was looking into the option of supercharging, but not anymore. Just for a thirst of knowledge I wanted to know real life facts as to why owners experience problems with TPC's supercharger.
Thank you Ad Sach I didn't know they were any different. The only thing I fear with the 996 swap is the notorious 3 little letters problem. If you think about it, you would spend what 10-15k for the swap and then what 6 months to a couple of years having to replace the RMS, sometimes over and over again. I think it's less likely (I'm hoping) for me to not have the RMS replaced on my +72k mile engine then an owner with lets say 20k miles.