I was wondering what you guys thought would be better/faster for an RX7. Also just curious, is it possible to SC something that is turbo??
-Frost

 

yes you can supercharge a turbocharged engine, and its not really better
If you want big power go turbo

Superchargers:
Pros:
instant boost
Cons:
parasitic as they steal power by being belt driven
bothersome pulleys
you can overspin them if you have wrong size pulley
you can make big boost but you get it late on

Turbos:
Pros:
exhaust fed
can make big boost
can make a little and be almost instantaneous
Cons:
can have lag, used to be a big problem in early stages (well 80s) and with big turbos


there are lots of other reasons.
I'd stick w/ turbo myself

 

Depends on the supercharger. You can make ridiculous power with some of those superchargers. Ask me for brands and such, but there are a couple that make 30 psi easily, and some up to 45 psi. There are a couple street driven blowers that can be pullied up to 36 psi and have all the boost characteristics down low. Or bolt on a race blower and pulley it for the street (non cogged).
I'll stick turbo on a tII, but for N/A, I would build an engine with TII rotors, street ported and use a big *** supercharger. I'm considering the latter for a daily driver.
Want more info on super charging? Just ask.
A couple pros and cons of SC that were missed:
Oh, and boost does not necessarily come on late with big boost. More often it comes on sooner.
Pros:
- BIG BOOST options. Usually much bigger than turbo for street cars.
- No need to change exhaust to install, or to change blowers.
- no need for intercooler (but good idea on big boost engines)
- some blowers require no need for engine oiling.
- more options for placement in engine bay.
Cons:
- will make boost even at part throttle. (could be a plus)
- cogged arrangements apply huge stresses to supercharger on decel
- no one does this to rotaries, really. Everything would be custom with little tech support.

But I'm into seeing some new stuff, like a NOVI 3000 on a rotary. That would be sweet.

 

Ok the reason I'm asking is because I going to buy a conv. and either redo the engine w/SC or swap it w/TII.My intitial plan was to do a TII swap then I was reading up on the camden SC and I'm debating on the better choice.
-Cyress

 

For a convertable conversion I would definitely get a wrecked TII and use the stronger, lower geared, LSD rear end, axles, driveshaft, stronger, closer ratio 5 speed, and TII engine. If you decide you don't like the turbo, then put the S/C on it instead. You will need the low compression rotors and strengthened internals for S/Cing anyway. With the extra weight of the conv. you really need the stronger drivetrain as well, they have reliability issues w/ stock motors!