Hello! I just got informed on another car forum about JR's new website, now featuring their new Rotrex SC.

"The new Rotrex supercharger combines the throttle response of the Roots supercharger with the compressor efficiency of a turbo, but without the lag. And the Rotrex does this without noise, without oil lines connected to the engine, and without the heat common in turbo applications. With boost capabilities of over 20psi we can address any special needs you might have in a custom application."

Only downfall I see is it doesn't make noise....so I wouldn't buy it, but I thought it'd be interesting to you all. They have applications going from 50hp-680!

http://www.jacksonracing.com/home.htm

-Cody

 

Would it work? Could it work?

 

this has just blown up on all the s2k forums as well.... seems to be interesting... supposedly more info after they get back from SEMA

 

I doubt it would fit, just because how the MINI is set up...of course unless there is a way to mount it in the back....kind of in the same spot a turbo would go.

Anyway, the important thing is it makes a whole crap load of power, but even more importantly, IT DOESN'T MAKE NOISE! WTF!?

-Cody

 

If you can fit a full turbo or a twin charge there is no reason this can't be done.
Getting the M45 out of the way and rerouting the plumbing for the IC gives you quite a bit of room.

Makes a crapload of power yes but you still need to do something about the pistons, at a minimum, at 20psi.

Centrifugals are nice.

 

Looks like they might be initially focusing on the Honda Civic, S2k and the Lotus Elise (Toyota engine). If they can make this happen on an Elise, CARB-certified, all the more reason to finally get one!

 

Is this kinda like the Votec SC (without the shaft) that I've been wondering about?

 

Well, it looks like another centrifugal supercharger... if you want to go that way, why not just get a turbo? This has the parasitic HP that a turbo doesn't.

 

I agree.

I was intrigued with this, until I read that there's no noise. What's the point? The whine is absolutely the best part!

 

My idea of a gas-electric hybrid would be to power that with an electric motor rather than off the crank.

 

Efficiency of a turbo without the lag...

 

I have to agree about the "no noise" thing. The SC whine is very intoxicating.
As long as the Rotrex would physically fit in location vacated by the M45, it wouldn't be very difficult making it work. Just need an electric water pump. I would rather use a Vortech or a Paxton, to get some whine.

 

I think they are saying 20lbs peak. A stock Miata would not last long, long being key. Think about all that extra room for underhood temp control & the size of that FMIC that will use every sq." behind the bumper cover. If it's CARB, more frosting on the cake.

 

I think that may be a case of exaggeration/hype...kinda like Gatorback's "quiet" belt If there's a turbine in there, noise will come out...

 

simpler installation, doesn't require a turbo manifold, doesn't need an oil line. maybe those are important to some people

 

Let's hope it's not 20lbs at idle eh?
The only downside is that centrifugals peak later just like a turbo( generally speaking). The boost tradeoffs are just like a turbo as well since it is the same thing. Small turbo= boost early. Larger boost = later. The Rotrex isn't a dual stage unit and they sure aren't cheap.

I'd rather see a twin screw.

Definitely would be a cool option though.

 

Lower under hood temps. No run after shut down temp control needed.

 

it's a mechanical turbine that uses planetary gears to spin the turbine...
http://www.rotrex.com/

But there's nothing really surprising here. It looks to be just another mechanical turbine design. Nothing special..... The cooler underhood temps would be in comparison to a turbo, not a Roots. It won't have the lag of a turbo as it's mechanical, but it will be a unit that works well at higher RPM....

But I don't see anything special in the design. Maybe I missed something?

Matt

 

Nope, nothing special other than there isn't one for the MINI.

 

20 psi coming thru the intake manifold will make alot of noise.

 

No big deal...

Matt

 

hey guys i'm sorry to inform you but the rotrex has already don been tried about 1.5 years ago. with poor results on the small 1.6 liter mini motor. power came on way too high in the power bad nothing until 4500rpm'sthen bam!! way too peaky, using an electric water pump. just ask george from mini-madness and he will tell you why he junked the project.

 

as that's the drag with the centrifugal SC, comes on at higher RPMs. It's much better mated to a motor that has lots of low end and needs help up top (think V8 with a street cam!), just like th Vortex and Paxton (and Procharger and on and on....)

Matt

 

exactly. they are using this supercharger for the 350z with pretty good results. 3.5L V6!!