victor25

Thats a complicated question, with lots of variables. So lets just assume your talking about a stock s4 engine. I have not tested a 38-92 yet, With the 38-91 and the 70mm pulley the max boost will be about 8lbs. The torque and HP come on much sooner with this supercharger that a standard CS. Its kinda like how a mid size turbo spools up -v- a big turbo or a vortech. Because of this the torque & hp curves look much different than the other cs kits ,and the flappy dip is eliminated for a nice curve.
Here is the before and after runs from last Friday. This was a stock run, and a run with 6lbs of boost. The dotted lines are my anticipated numbers with larger inkectors, instead of those weak 19's. We are going Saturday, so I should have some good charts for you the first of next week. With the AF readings on there also. I will PM them to you if you would like. BTW .. I think his dyno numbers are a little off, I would take off about 10% personally.

Cosmo Kramer

^^^
Impressive torque numbers, very nice!

You can get it at UPI on hwy 24 between Cambridge and Guelph, unfortunately it is a few cents per litre more then regular gas.

BC

Hippy gas. Okay.

Less BTUs but more ability to run higher boost pressures, higher CRs, and more timing all at once, thereby creating additional efficiencies in the motor.

And its 105 octane.

90 S-4

wrong answer ...

victor25

I already know your running 24's... is that what you want to know? or you didnt like my answer?

BC

I think the units are suggested to run TWO on a larger motor like the 928.

Imo000

Can't you do all this with regular 105 race gas and get more HP than with E85?

I'm not a fan of wasting food to make fuel for cars.

namasgt

A friend of mine has a Rotrex kit on his 98 Mazda miata and very happy with the results, he did add an inter cooler after a few months.
Last month it dynoed at 220 rear wheel horse power, I think stock engine makes 120.

BC

There are plenty of threads in OT that you can peruse and post in if you would like to NOT let your human brain separate how great the fuel is and its origin. Please do so over there.

Here - its a great fuel, MUCH cheaper than race gas, and cools the engine even more than the octane would demonstrate.

Carl Fausett

Building on the strength of our Stage II kit for the 87-95 928 (504 CHP) here:
http://www.928motorsports.com/parts/32v_stage2.php

We are close to launching our Stage III supercharger kit which includes a complete Electromotive Engine Management System. Expected release in summer 2011.

Here are a few pics of the Stage III kit installed at this moment:

928mac

Hey Carl, do you sell those dist. hole covers?
I was thinking of using a black mesh screen? would this extra air be an issue.

Sorry I am following the SC topic with a fine tooth comb and enjoy all the info on your build Victor.

Carl Fausett

Yes, we do.

They are here: http://www.928motorsports.com/parts/...tor_covers.php

BC

928mac

If you know a cheeper way, don't be shy, speak up.

BC

Mac- i posted pictures of plates I designed almost exactly like this back in 2003 or so.

I just think it's funny. 120 for both but with no polishing like mine I guess is okay with his normal markup. I would be happy to try and fund the design and send it to anyone that wishes to have them made themselves. I used emachineshop.com