Corvair twin Turbo

[pdq67]

Fuelie,

Thanks for not laughing at me!!

And PLEASE again..................

Can we remove the cast-iron cylinder barrel fins and can the suckers and then individually manifold water cool each cylinder can say bottom in and top out, one at a time to a small belt-driven w/p and rad.!!

That said, I flat DON'T know if this can be done or not??

But, heck, if a guy can pipe a multi-stage NOS system, then this should be a piece a cake, imho........

pdq67

[ScottS]

Hi Guys

Just wanted to chime in on the fan thing. I think I know why the belt gets thrown.

When the fan ( which is pretty heavy) gets spun up to high rpm, and when you let off the gas, The engine responds with some compression braking and the revs drop - but the fan wants to keep spinning- so the belt , which was under tension driving the fan by being PULLED around the pulleys, is suddenly being PUSHED around the pulleys by the momentum of the van.

I think the solution is a simple one way sprag clutch on the fan so when it wants to spin faster than the engine, it can.once it slows down to the engine rpm, or the engine speeds back up to the fan speed, then the engine can drive it again.

This should stop any thrown belts.

Motorcycles have one way clutches so that they don't lock up the back wheels when downshifting, a pretty simple clutch is just two disks, one rotating inside the other with rollers in between on ramps- turn it one way and the rollers jam , and you transfer drive from the inner hub to the outer- drive the outer hub faster than the inner and the rollers just roll. One of these days I am going to build one- it could be built right into the fan pulley.

[Corsa]

Has anyone thought about adapting a blower off of say a 3800 series 2, adapted to the stock tin, pull the throttle body off so it can really suck, fix up a different pulley on the front, and bingo a fan that won't slip belts. plus you could duct the intake for the blower to a scoop on the hood, or under the window to pull cool air in. This would get the psi needed to "push through" the cooling fins, would vary with engine speed, and flow the right cfm, especially with different pulleys and intake size options.

I know where one of these is, at a junk yard here close to the house. I'll buy it when I have money (not sure when that'll be, don't hold your breath) and see what I can come up with.

This same kind of system was used on the "cammer" engine in the astro1 concept motor.

[The Stickman]

Way back when in the mid 90's I ran track events with a Corvair club. I friend of mine thru those events had a convertible twin turbo car. He used Motorcyle turbos and a 390 cfm Holley 4barrle I gave him.