8v92 Superchargers

What exactly is the application you want to build one for? Working truck, sled puller, or just a toy…?

 

When I look at a twin screw supercharger, it looks pretty much the same thing as an 871 blower. Not seeing an advantage here.

 

Look into boat engines. They tend to have more pony's and twin turbos in some applications.

 

They have the advantage of being able to use water-cooled intercoolers, too. The endless supply of cool water guarantees a cooler intake stream vs. an air-to-air setup.

 

I don't remember details (and too wiped to look right now) but I believe it's because the screws don't gulp their displacement all at once the way the straight lobes of a Roots-type do, it's a much more constant flow.

 

Twin Screw vs. Roots | Kenne Bell

tl;dr: The twin screw compresses the air internally between the rotors, the Roots just moves it around the outside of the rotors and "stacks" the air into the manifold to compress it.

 

Indeed. Even a little 736 cubic inch 92 can push 600 horses in a marine application….

 

When the Rpm’s drop doesn’t the turbo slow to the point it’s not doing anything? ie: turbo lag. Unless you have a small turbo wheel. And if that’s the case wouldn’t it be too restrictive at high RPM’s and push too much boost?