NHRA Trans Am

could you take the hot side off of a decent sized tubo like a T70 and put a pully on it, to turn it into a centrifical supercharger? You would need a pretty big pully on the engine and a pretty small one on the turbo to spin it up fast enough to build boost?

Speed

iTrader: (33)

In theory, yes. You won't get the reduction you will need with pulleys alone in any practicality. You will need a gear set or multiple pulley configurations.

So to answer your question, yes it's absolutely possible if you can work out the drive system, the lubrication system, the mounting, belt routing, etc ,etc. Then a lot of people will just ask.. Why? lol

HUNTER02SS

iTrader: (24)

Like he said and again Why go thru the trouble, other than being different.

frcefed98

iTrader: (16)

Rotex superchargers.

NHRA Trans Am

I want to do it as a do it myself project, i love to build things and i thought this might be a good opertunity to make something on my own.

HUNTER02SS

iTrader: (24)

It would definatly be different, but the rpm's you would have to get it turn to make it efficent would be way higher than any centrifgal supercharger.Don't turbo's go 110,000rpm or somewhere in that neighborhood.Cetri's go to 65,000 or so?
It would be way up on the cool factor if it will work.

NHRA Trans Am

if you do some quick math if the pully on the engine is 10 inch pully on the engine and a 1 inch pully on the tubo at 5000 rpm the tubo will spin at 50,000 rpm, now thats not 100,000 but it has to do something.

HUNTER02SS

iTrader: (24)

It might do something just not sure how much?

NHRA Trans Am

If i read the T70 tubo chart right at 50000 rpm it would be performing at about 74% effencity and if i am interpreting it right then it is possable to produce 5-6 psi which is plenty for me

BIG BAD BLACKSS

iTrader: (4)

You would never stop belt slip with a 1" pulley. Youll need osme kinda gearing or multiple belts. Not sure if you setup multiple belts/pullies youd be able to keep the belts stable at the kinda RPM youd have them turning.

NHRA Trans Am

thats true, too bad gears are expencive and need a case so they can stay oiled, i'll have to do some experiments with belts.

BAKED

iTrader: (14)

Be really different and make it a chain drive instead of belt driven. LOL

ss53mech

Possible maybe, but you would probably have to devolop and machine and entire new housing as the turbo bearing are not intended for any kind of radial load on the bearings. they have thrust bearing and the like but to drive one via belt at that speed would surely ruin the bearings they ride on. You would need to put entirely different bearings with wider/harder journals on them and machine a shaft to match with a housing that could support it and then once it was all together have it balanced. If you really like to build stuff and engineer your own toys then go for it. But in my eyes, you are going to spend more money for less power, and reliability, and more headaches. Just my .02.

NHRA Trans Am

well thanks for your input, your the only way i would have had my questions answered. Now that i am enlightened about turbos, i think i may just use my money to build a cutom rear mount turbo kit that sounds more feasible. I'll have to start planning.

stevieturbo

Iif you can develop bearings that will handle 110,000rpm from a mechanical drive, then you are doing better than all of the current centrifugal supercharger manufacturers.

And not all turbos spin that fast...the bigger they get, the slower they can spin.

Very very simple reasons for that. Its so tip veloicties remain within sensible limits, so the wheels dont explode.

smokinHawk

iTrader: (48)

dumbest question evAR!