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Rotrex Supercharger

Old 01-09-07, 10:53 PM
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Rotrex Supercharger

So as some of you might know I have been looking at purchasing a supercharger for my SP 12A. With only the Camdem as an available option, I thought i'd look at different models so that maybe I can fab up my own. This one looks very promising and would seem fairly easy to install (much like the installation of a turbocharger)

This is the HKS model of it for the 350z.





You should be able to futher see the resemblance of that to the turbocharger. So you could basically (i'm assuming here) use it as a blow thru type supercharger on a carb. From the rotrex website I see that they have basically 3 sizes.

1) C15
50-200Hp
201,500 rpm max impeller speed
1 : 12.57 gear ratio

2) C30 (The one that I might opt out for)
100-400hp
120,000 rpm max impeller speed
1 : 9.49 gear ratio

3) C38
300-630Hp
90,000rpm max impeller speed
1 : 7.5 gear ratio

Fabbing up a bracket to this would seem fairly easy to do, and could be mounted where the AC/PS units used to sit. This would eliminate one big problems that i've seen with the camdem which is hood clearance issues. (unless you go with side draft webers or so but that really isn't all that cheap especially custom making the piece to go from the weber to the supercharger. Let me know what you guys think about this idea. I'm pretty much a noob with boosting and stuff so let it out.
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Old 01-10-07, 12:44 PM
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If I may suggest, Oscar Jackson is now one of the main (if not the only) U.S. distributors of the Rotrex supercharger http://www.jacksonracing.com/home.htm

Upon my discussion with Oscar at PRI, we did discuss creating a supercharger around a rotary engine. He not only said he'd do so, he was pretty psyched about it. I think utilizing his skills would be your first step in adding a supercharger to that 12a.

~Mike
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Old 01-10-07, 03:30 PM
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well this compared to camden, this would be a much better setup i would think. Especially with the option to be able to intercool this and it would just seem alot easier to do I think. Thanks for that site I will try to get intouch with him, Anyone know maybe of a contact in canada? Thanks
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Old 01-11-07, 03:27 PM
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no one has tried this kind of supercharger on their cars before?
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Old 01-12-07, 11:03 PM
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How much does one of these cost? I would love to fab up my own setup, sounds fun.
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Old 01-13-07, 01:49 AM
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well looking at the prices from wheel to wheel website ... c38 model is 2295 which should be cable of 600HP with a single one, and that is only 100$ more than the C30 models, so I think that i might go for the biggest one. the c38 model are capable of producing from .50-.55kg/s of max air flow, as the c30 model only produces about .3 something which someone on in my first gen thread said might be insufficient for a SP 12a. All the rotrex super charger come with their own oiling system (lines, filter and holding canister, and its own "traction oil") oil coolers can be purchased seperately, and no external pump is required to move the oil. They mentioned that you must use their oil for these pump and can't use regular engine oil for it.
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Old 01-13-07, 03:37 PM
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I don't know...I think I'd still rather see a good, properly-sized positive displacement unit adapted to a rotary then use a centrifugal SC. With a centrifugal unit you get nearly the same lag problems as with a turbo and likely the same spikey torque curve. Something like a Magnuson MP90 or a Whipple W305AX seems like it would be about the right size and capable of appropriate flow (I haven't done the math though), and mounted on the cold side of the engine it would have the ability to be intercooled.

-chris
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Old 01-14-07, 02:11 AM
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May have found the best of both worlds ... this is the Antonov 2 speed version of the Rotrex supercharger ... this unit enables boost at low (about 1,500 rpm) and high, the kick switch between a high and a low is controlled via a solenoid, which can be adjusted for when to make it go high. this is graph from it.

http://www.antonov-transmission.com/graph.htm

Not sure yet on the cost of this unit though.
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Old 01-14-07, 09:07 AM
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Wheel 2 Wheel is another US distributor of the Rotrex superchargers:

http://www.w2wpowertrain.com/

Andrew
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Old 01-14-07, 01:57 PM
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Ya i knew that ... I'm actually trying to find one for Canada.
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Old 01-18-07, 12:10 AM
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Hopefully something comes of that idea for a rotary package. Would be nice.


BC
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