I know a twin charger Evo was built but I was wondering if anyone has attempted using a Centrifugal Supercharger to spool a large turbo? I figure the turbo manifold setup could be scraped and replaced with a header. I ask this question because my goal is to have a large turbo with quick spool. I have a spare evo 9 block and head that has been built sitting on an engine stand, and I look at it everynight wondering if I should do something different. I figure that my evo will end up not having an AC compressor or powersteering, that should leave me some room to customise a few things. If anyone has anyadvice on this let me know....
any ideas would help

 

It's been tried, and I don't think that it worked out all that great. You could just use a simple little shot of Nitrous to spool the turbo. It would be a lot easier...

 

no powersteering sux. . .wouldnt recommend it even for track driving

 

I dont mind, once the car is rolling its alot easier. combined with the close ratio steering its alot easier at higher speeds.

 

it's been done with subys I know that for a fact...not insane results

nitrous is more commonly used to spool turbos and definitely much less expensive

 

+100000!!All the Supra use nitrous to spool ther big turbo(GT47-88 or GT51-91)!!!

 

the guy who did it was in denver where a big turbo would hardly spool at all up there.

 

way to complicated.

Using nitrous works great to spool bigger turbos. MASSIVE tqe hits also.

 

I'm still pissed the car doesn't have cruise control. I'd kill someone if it didn't have power steering or A/C.

Getting rid of the power steering is might not be a good idea unless this will be a straight track ONLY car. The power steering gives you more leverage to maintain control of the car during quick or abrupt maneuvers. The quick ratio steering of these cars already transmits too much sterring feedback over road abnormalities. Without power steering, you will be fighting the wheel more, and it will be even harder to hold onto if you need to quickly regain control. I also know that most race cars don't have power steering and they work fine, but they were designed that way, the Evo wasn't. In my (nearly worthless) opinion, it's definately not worth the minimal horsepower gain and almost negligible weight reduction.

Speaking of no power steering, they have a turbo kit for the old supercharged MR2's from the 80's. The turbo feeds into the supercharger and then into the engine, but I don't know how it works. It's a cool idea.