I know for the 99-04 GT evryone said it was a big no no to have underdrive pullies and a belt driven superhcarger. So what about these new GT same deal or what?
If the necessary belt size does not change i dont see a problem. But, if you got the udp for power isnt a supercharger enough power? I have also heard not to, but i can't say from personal experience.
Well my point of view is, build the car up n/a then supercharge it. So if u were staying n/a for a few years and get all the bolt-ons including udp, so you wouldn't have to take them off later when u wanted to go with a supercharger.
Underdrive pullies have a smaller crank pulley this will in turn spin your supercharger slower. Therefore your boost will be down, to compensate you can get a smaller blower pulley, but you can only go so small and decreasing it's size leads to belt slippage. If your ultimate goal is boost, then at least keep stock pullies to put back on. Better yet concentrate on mods that help your engine breathe better I.E. long tubes, CMCV delete, heads & cams and when you do slap on the huffer you'll get that much more for it.
Slightly off topic. Does anyone know where to get replacement billet pulleys? I mean if you want to dress up your supercharged engine and can't use UDP's then we should be able to find them somewhere... I would hope.