Not my intention to open a can of worms here. However, I stumbled on an old thread that discussed M7's development of an aftermarket blower... I believe a roots-type? that would more efficiently make more boost than the Eaton twin-screw (or do I have those backwards?). Anyway, the thread died about March 2004, when it appeared that M7 was getting close to something.

Does anyone have any news on the project? or has it been scrapped?

thanks!

 

Thank's for your inquiry regarding the Twin screw Autorotor project....

Randy Webb and I have teamed for this project.
The system is more then 50% on the way to be a viable product, and
hopefully it will be ready to ship in the first quarter 05.

Please feel free to contact either Randy or my self for more information.

peter
Team M7

562-712-3270

www.m7tuning.com

 

First, you do have them backwards. Twinscrew is efficient, roots is what we have. I haven't heard any info other than the M7 website which says they're working on a new reduction pulley that will reduce heat buildup. If they are working on a new SC, then it's still most likely under heavy wraps.

 

http://www.rms-tuning.com/mini_tuning.htm

They already have an Autorotor upgrade. Expensive though.

Alex

 

Thanks, Peter for the update!

And thank you Kapps for setting me straight.

That RMS system is pretty sexy... wish I could read German... looks like a very robust system.

 

If I'm not mistaken, RMS has done a fair amount in the BWM world. I believe their superchargers are of the centrifugal variety, but this one is a twinscrew. If so, like the Rotrex for the MINI, I'm sure they have some nice peak HP. But, the drawback is their lack of boost at lower RPMs. I think it was over on MINI2 where they posted a dyno chart of 265 or so hp, but 192 ft-lbs of torque...

Here's a cool link that briefly compares the 3 types:

http://en.wikipedia.org/wiki/Twin-sc...e_supercharger

I see why Peter wants to go the twinscrew route! And with Randy onboard...

 

yummy.

 

AND...

 

Rough translation German to English:


The firm RMS places you on this side Tuning variants for that
Minus Cooper S, Cooper, One and One D before.
Our Tuningangebot is rebuild can a module system with that you your minuses gradually.
The reconstruction can result exactly worked here however also in each specialty workshops of your confidence, there all parts for your vehicle and/or be enclosed all Mondays parts. gTuning computer:
You generate want your Tuningpaket how you!
Information on minuses S Cooper as a PDF MINUSES Cooper S 163PS / 210Nm -------------------------------------------------------------------------------- . Wasserladelufkühlerkit:
Water drawer air cool water pump tubes clamp water cooler
More achievement ca 25PS 25Nm more information than a PDF 1.380,- € with the brilliant solution of the water drawer air cooler system, it is arrive us to reach an unique achievement development.
Colder air has more oxygen and through it more achievement no thermal overload fuel savings in same achievement
request very good talk behavior through the short ways vis-à-vis other systems water drawer air systems diminish noise
Specialties more crooked
available with Kat (10PS/15Nm) and without Kat (10PS/15Nm) 726,- € 435,- € Auspuffanalge
3-teilige exhaust fume concern from 1.100 specialties more crooked (10PS 10Nm),- € Laderrad
Without software (10PS 10Nm) 345,- € software to Laderrad (15PS + 8Nm) to Laderrad + water drawer air cooler
(15PS 8Nm) to Laderr. + Wasserladel. + Fächerk. + Auspuffanl. (15PS + 15Nm) 550.- € 550.- € 600.- €
motoring compressor
with Anbaukit not without Euro water drawer air cooler TÜV 4 removal
30PS 20Nm more achievement 3.600,- € cylinder head
with revised a-/outlets, larger valves and motoring camshaft
20PS 20Nm more achievement 2.200,- € motoring camshaft
With longer entrance times and outlet times. Higher idling number of revolutions is not necessary. 395.- € MINUSES Cooper 115PS /149Nm
-------------------------------------------------------------------------------- . Cylinder head
with revised an outlet, larger valves and motoring camshaft
15PS 20Nm more achievement 2.200,- € specialties more crooked
available with Kat (6PS/10Nm) and without Kat (10PS/10Nm) 726,- € 435,- € exhaust concern
3-teilige exhaust fume concern from 1.100 specialties more crooked (6PS 8Nm),- € without image compressor
reconstruction sentence
Original Ansaugtrakt drawer air cooler original minuses compressor with Wasserp, original hold and tubes
Achievement 149PS 200Nm TÜV in preparation price a. A minuses One 90PS 140Nm -------------------------------------------------------------------------------- . Cylinder head
with revised an outlet, larger valves and motoring camshaft
15PS 20Nm more achievement 2.200,- € specialties more crooked
available with Kat (6PS/10Nm) and without Kat (10PS/10Nm) 726,- € 435,- € exhaust concern
3-teilige exhaust fume concern from 1.100 specialties more crooked (6PS 8Nm),- € MINUSES ONE D 75PS / 180Nm -------------------------------------------------------------------------------- . Without image
CHIP-Tuning-sport-version
Software optimization in the original tax device
Achievement: 99PS torque: 230Nm 675,- € brakes & load work for MINUSES Cooper S, Cooper, One
-------------------------------------------------------------------------------- .

 

i noticed a couple of ineresting things:

it looks like they are using a custom water pump driven off it's own belt along with the alternator via a custom stepped crank pulley; the blower is on it's own belt.

why are there 4 hoses on the water jacket of the intercooler?

 

It tee (Y's) into two:
http://www.rms-tuning.com/pdf/LLK_komplettsatz.pdf

 

more stuff, & pics



http://www.rms-tuning.com/pdf/mini_pro.pdf

 

Note 5 lug wheels too.

 

This must be one proud German! ...his silly grin!

 

And now....


This will make you **** your pants!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



http://www.rms-tuning.com/foto/mini.avi

 

wrong fluid...

Sounds damn close to standing in the Pits at the Indy 500.

 

damn, i want my mini to shoot flames out the back

 

What! Flames out the front wasn't enough?

 

Hm. Impressive, but this setup doesn't look very "streetable." That water pump mounts right where the stock AC compressor should be. While AC is just extra weight and parasitic loss on the racetrack, for the highway there are certain creature comforts that are getting more important as I get older. Plus, the automatic climate control wasn't a cheap option, even if it was part of a package- I'd like to keep it intact and functional.

I hope M7 manages to come up with a solution that doesn't require sacrficing the AC to make room for other components.

BTW, will this mod affect the warranty?

 

Dang, that sounds wicked! Good job with those finds Bisch . One of the provided links had dyno plots, but what does that translate to in our units? I would venture to guess that the boost needed to achieve that power is markedly less than a turbo...

 

...translation by Babelfish?
"All your MINI are belong to us!" :smile:

 

So Bisch,

When are you getting one of these???

I'll come down and help you install it . --'cause i want the first ride afterward

 

Hi Guy's

Let me chime in regarding our setup versus theirs.....

No...the AC is not sacrificed, a seperate belt for the SC is not necessary
as our SC extension was custom machined to match the OE pulley location.

We will use an electric/computer controled water pump minimizing parasitic drag
on the engine.

Intake manifold custom made with velocity stack runners to tune the powerband.

Intercooler will be very innovative, you have to wait and see.... :smile: :smile:

Hope that answered some of the more burning questions for now..

peter
562-712-3270

 

Almost. Will the soon-to-be-released M7 CAI work with this supercharger upgrade?

Now comes the wait for the photos and the dyno charts!

Don't wanna wait, do wanna see!

 

Yo Peter, while not exactly burning questions, I do have a few more, if you don't mind:

1. Do you expect the twinscrew solution to produce power in the 275 hp range, a la the twincharged units?

2. As I believe that will be a yes, is it true that this SC can do so with less boost - ie, be less taxing on the engine?

3. What are your reasons for choosing a twinscrew, and in particular this one?

Thanks!!!