Great car and engine, but if the engine was a turbo it would make more peak power. The Kompressor makes the car much easier to drive, without the turbo lag.

 

I've driven an '94 Miata (1.8L transplant) with a kenne bell supercharger @ 12 psi and it pulls like no other. Not as much top end power as a turbocharger and you can't crank up the boost as high, but I'll be damned if that thing doesn't have some serious torque.


Sure, the s/c robs a little bit of torque to run, though it's not like it doesn't supply well more than what it takes..

 

I have been thinking lately of riging up a T-bird (Eaton M90), supercharger with some custom brackets/pulleys to blow through the stock intake.... (I hate carbs). Any opinions on that? The blower is commonly used on V8's and large V6 motors, so it must blow enough air for a rotary.......right? Has anyone tried this?

John

 

atkins/camden is almost done with the stock EFI supercharger kit.
dan

 

Yeah, but it will cost more than my whole car did. (<$4000 so far)

 

M90 isn't the best choice...

Track down a whipple or other brand SCREW charger. I run a GTP as my faster car, which has the M90. Good S/C but once you start blowing 12-14 lbs of boost, it's a hairdryer, and just heats the air up WAY too much. A good whipple will cost more, but be a LOT more efficient. no point in going through the trouble and not doing it right.

 

This is true, but consider the applications......I am also familiar with the M90--I have a T-Bird SC which uses the same sc. (btw--the Mercedes Kompressor is also a version of the M90 with a shorter snout) In the T-Bird, I don't run 12-14 lbs boost. It is set for lower boost from the factory--8-10. Compared to the same engine without the SC, this thing really flies!! I am also looking into putting an M90 into my GXL. If you keep the boost between 8-10 lbs you will have no problem with the "hair dryer" heat. I agree with you about the GTP, but let's get real here--the average 7 owner on here who is looking at turbo vs. SC is NOT looking for the all out top speed, but instead wants a DRIVEABLE car. How many of you run out to your 7 each day and drive to work at top speed? Sure, the turbo has more potential there, but let's be practical.....the average of us wants to be able to leave someone at a stop light, or be able to pull away from them on the highway, NOT max out at top speed. This is why I am looking at the M90--it can safely spool to over 13K rpms(important for not overspeeding the charger), I already have the complete unit including piping and IC, and once I remove the power steering pump I will have enough room to mount it. The problems now are the custom fab work for the brackets and how to route it into the intake system. I think it would be cheaper and workable to custom route it into the intake instead of having a new custom IM made. Then I will also need to have a 6 rib pulley done, and lots of testing. As soon as I get the time I will start on this and will post all the info here.

I like the Whipple, but the idea here is to make a more cost effective setup, and the extra cost of the whipple kills that. I got this M90 for $125, and it came out of a wrecked car that only had 29K original miles on it. So as long as you can do some of the fab work yourself, you can eventually end up with a workable sc setup without having to spend the $4K-$6K that some setups cost.

 

just to throw in an intersting idea.....

since the Rotary Design was originaly a Supercharger for planes.....

Why non Make a Rotary style supercharger for a rotary engine


I bet that'd turn some heads.....

 

You can get a kit to SC a classic mini - 1 litre with forced induction!!!

 

not quite the same but i had a VW corrado G60. running 16psi rs outlet kit . it gave 235bhp. i sold the charger and replaced it with a turbo conversion. gave slightly more boost . but in a straight line the the turbo made it the quicker car.but on the street the charger kicked. it was boosting from 1500 rpm.

would there be a way of having a charger upto the 4500 rpm then swap over to the turbo for higher rpm. that would be sweet. that lovely charger noise when cruising and the whistle from the turbo when burning!!!

 

Yes, it's call a twin charge system. (or something along those lines)

People use them when they make major HP, and the are useing a massive turbo for all their power. But they don't like haveing such an extreme dyno quen, so they put the supercharger on to give the power down low until the turbo spools.

I'm not sure exactly how it works but I know it is done.