Was wondering if you could take a turbo, remove the exhaust half and mount a gear/pully on the spindle to make a centrifugal supercharger.... I personally dont think it could spin fast enough to put out boost but a couple friend think if the pully is small enough it will work. Any opinions??

 

yes, it would work but....... like you said getting the speed is the problem. the other big problem is getting your internal drive to keep from side loading the shaft. there are ways around this of course but, after all you are only making a centrifical supercharger. just alot harder way of making it is all

 

Bearings that are designed to handle that kind of loading cannot handle that kind of speed, and the semi and full floating bearings that are used in turbos do not handle side loads well at all.

The way around this that they did with the early centrifugal superchargers is they used a turbo compressor housing _MUCH_ bigger then what was appropritate, and then didn’t have to spin it as fast. It’s a very inefficient way of doing it but it does work. What modern manufacturers do is they actually use a different wheel and diffuser design which is optimized for slower speeds.

When it comes down to it, it's easier/cheaper to find a used head unit to rebuild then to assemble something like this. It will work better also

 

Why not just use the turbo?

 

Too small. Its a TEO4H from mitsubishi. Im trying to get another so I can do twins.

 

Could you just get another and use one turbo for each exhaust manifold?

 

If its too small when its exhaust driven wouldnt it still be too small if it was belt driven? Even more so i would think bc you wouldnt be able to turn it as fast(?)

Anyway twins sounds like a good idea. What engine/chassis is it from? Just curious.

 

Its actually from a Chysler LeBaron Turbo. 2.2 L4. But some DSM's had them on their 2.0.

 

Oh just like the Daytona (Dodge) Didnt they make like 220 ish horse with those things in like 91? Im still learning when it comes to turbos, but id think 2 of those would be too much for your stock 2.8, or are you building that sucker up?

 

Sure am. Making a custom intake, gonna get an aggressive cam, free flowing exhaust, 1.6 rockers, ASP underdrive crank pully. Got a CAI already and no cat. Sounds mean as hell.

 

are you gonna stroke that 2.8 to a 3.1? after all, no replacement for displacement

 

Quite possibly.

 

Back to the converting a turbo to a s/c issue, wouldn't side loading of the shaft be lessoned if a lower tension gilmer belt was used? I think I even saw an albrex supercharger that was driven my two chains.
I was seriously considering such a conversion til I realised how good an eaton supercharger would look atop my engine

 

Turbo's generally spin at 60k-100k rpms, so you'll need an internal gear drive in addition to the pulleys - just like a supercharger. There's a reason they aren't cheap. Assuming an 8" crank pulley, for a 15x step-up in rpm, you'll need a 1/2" blower pulley. It'd be a lot less work to just get a junkyard turbo or two that's big enough. In the meantime, build it with what you have, enjoy it, and upgrade once you find the larger turbo. 30 minute swap.

 

This site might help you..
www.turbomustangs.com