[SVTcobra306]

Hypsi said it. Not ALL turbos have lag. Look at my '89 Daytona. It has a 2.5 liter 4 cylinder. Zero lag with the stock tiny mitsu turbo. I mean zero. It will build 12 psi with the tranny in neutral and the wastegate unplugged!

a Garrett T-03 (same as a T-3 but built for a chrysler) with a .48 exhaust housing has very very little lag on the same motor. Most of the "fast" turbododges I know of run a 2.5 with a hybrid and .63 housings.

Single turbos driven by 8 cylinders have proven the most efficient moslty because you can spool a massive turbo with 8 cylinders and flow a lot of CFM.

Centrifugal superchargers have been used widely on 'stangs because it isn't far from a bolt-on affair. Some of them are bolt-on, the ones that don't require oil line plumbing.

The problem with running a turbo is the fact that Ford EEC electronics have no provision in them whatsoever for timing retard and fuel enrichment under boost. Yes, the pressure regulator will up the PSI, to a point, but you still need some kind of FMU and boost retard...