[preston]

I read this thread as well I think you guys are over complicating it. This isn't 1985 people are putting turbos on everything imaginable. I guess your main obstacle is probably budget. I would look seriously at running a rear mount turbo. There is room to run a 2" charge tube back up alongside the exhaust and into the TB. On my 92 there is plenty of room for an underhood turbo where the airbox is, but bringing in the exhaust from both banks and then having room to run the turbo exhaust back out would be very problematic. I just don't see a lot of other paths to get a 2.5" pipe out of there. Even if you built your own manifolds which would be overkill for this application that wouldn't help. The rear mount turbo solves a lot of packaging and heat problems and since hte point (at least for me) would be to maintain the cadillac off idle torque and use the turbo to beef up the midrange and top end any increased lag is not an issue. Rear mounts are being used in all sorts of applications and while lag is slightly larger than a front mount its not a huge issue. Lag has never been a big issue on V8 turbo apps anyway.

With the CAd ecu tied into so many functions and it works so well with all its diagnostics, my plan would be to use a Megasquirt to run 2 extra injectors in the inlet tube before the throttle body. They also sell other standalone injector drivers, but you will need to interrupt and change the timing as well and the MS can do that as well, and give you some datalogging. Connect a wide band to it and you should be able to put a good tune on it.

Anyway, just rambling, I"m not gonna turbo my CAdillac because the whole point of it is to be a no hassle daily driver. I keep telling myself, hot rod your hot rod, and leave the Cadillac alone !