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Old 02-21-2009, 02:39 AM   #1
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Default Rotrex anyone?

Oscar Jackson, who started Jackson racing, then sold it to Moss Motors, is now selling the Rotrex SC. Has anyone put one of these SC's in their car ?
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Old 02-21-2009, 02:42 AM   #2
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I just dont see the point in putting any supercharger on our cars when turbo's are so cheap
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Old 02-22-2009, 07:35 PM   #3
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Default Miata Rotrex You Tube Dyno Video

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Old 02-22-2009, 08:00 PM   #4
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Quote:
Originally Posted by 18psi View Post
I just dont see the point in putting any supercharger on our cars when turbo's are so cheap

The point is to make less power for more money! Don't you get it?!?

183hp at 10psi? I made 241 on a Mustang dyno at 10.5 psi with my BEGI S4 system.
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Old 03-31-2009, 04:11 PM   #5
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I got a ride in the Rotrex car @ [email protected] and it pulls VERY nicely - WAY stronger than the JRSC and more than the FFSC. Of course it was intercooled, but it was still very impressive (and quiet if that matters to you). It would be my first choice for supercharging a 99-05 and I might end up going that route after I swap out my LE's 1.6 for the '99 I have sitting in my backyard
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Old 03-31-2009, 04:49 PM   #6
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Talk to Emilio.


here's my rotrex:

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ps. not really


But here's the reason that for most intents and purposes superchargers are FTL:

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Old 03-31-2009, 04:53 PM   #7
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Quote:
Originally Posted by minime View Post
I got a ride in the Rotrex car @ [email protected] and it pulls VERY nicely - WAY stronger than the JRSC and more than the FFSC. Of course it was intercooled, but it was still very impressive (and quiet if that matters to you). It would be my first choice for supercharging a 99-05 and I might end up going that route after I swap out my LE's 1.6 for the '99 I have sitting in my backyard

Impressive, yes, quiet, no. It was just about the only car breaking the LS sound rules. Very fast though, I rode with Savington for a few laps chasing that thing.
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Old 03-31-2009, 05:46 PM   #8
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I meant the blower sound and the reason his exhaust was so loud was just that - his exhaust.
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Old 03-31-2009, 06:01 PM   #9
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Ahh, gotcha.
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Old 04-12-2009, 03:51 PM   #10
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The graphs show the exact reason why I have been working with Oscar to change the way SC boost is managed. We have come up with a simple way to improve "spool up" dramatically while still limiting top end boost to a reasonable number. I will post some graphs soon.
I put 600 miles on the test car at California Speedway over three days, with the only problem occuring under high lateral G load all the fuel went to the right side of the stock tank (only 1/8th on the gauge when level), and we fueled starved under full boost!! Detonated the spark plug electrode and insulator into a bizzilion pieces.
Will drop a fresh crate motor in and be back at Buttonwillow for a three hour endurance race at the end of this month for further testing, but this time with a fuel pressure safety kill loop in the ECU.
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Old 05-26-2009, 11:46 PM   #11
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Default Rotrex

Yes, I have recently fitted A Rotrex 74,crank pulley 150mm SC pulley 95mm
intercooled,xede ecu.180rwhp
Cheers
OD
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Old 05-27-2009, 03:55 AM   #12
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need pics ^^
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Old 05-27-2009, 05:39 PM   #13
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Read the 949racing site: super reliable, upgrades for >200whp available, no overheating. If it is all true and I would start over it'd be a serious candidate.
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Old 05-27-2009, 05:57 PM   #14
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One of the local shops here in Huntsville does modified BRP MP62 kits on S2000s and Miatas, and they flat haul ***. In kill mode, the shop manager's Miata makes ~240 wheel and more torque, and it makes that torque from idle to redline. I've autocrossed it some, and the thing is simply disgusting. It'll blow 225/60-14 Hoosiers off at will at essentially any reasonable autocross speed.

That said, big power centrifugals are... a pain in the *** at best. My buddy's 97 Cobra makes 600+ through a C4 and a 9", and it was nigh un-drivable. It made so much power on the top end that you couldn't shift it fast enough with the 5 speed to stay out of the limiter, and every time you hit the limiter it would toss/ shred the belt (10 rib aftermarket setup, aftermarket tensioners, etc). For a medium power setup, I could see it being fun, but I can't ever see it being economical...
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Old 05-27-2009, 09:05 PM   #15
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Quote:
Originally Posted by vehicular View Post
One of the local shops here in Huntsville does modified BRP MP62 kits on S2000s and Miatas, and they flat haul ***. In kill mode, the shop manager's Miata makes ~240 wheel and more torque, and it makes that torque from idle to redline. I've autocrossed it some, and the thing is simply disgusting. It'll blow 225/60-14 Hoosiers off at will at essentially any reasonable autocross speed.

That said, big power centrifugals are... a pain in the *** at best. My buddy's 97 Cobra makes 600+ through a C4 and a 9", and it was nigh un-drivable. It made so much power on the top end that you couldn't shift it fast enough with the 5 speed to stay out of the limiter, and every time you hit the limiter it would toss/ shred the belt (10 rib aftermarket setup, aftermarket tensioners, etc). For a medium power setup, I could see it being fun, but I can't ever see it being economical...
Begin threadjack

You've got to give me a ride in your miata. Joined the army haven't seen mine in almost 7 months, and now I'm stationed at Redstone in Huntsville.

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Old 05-27-2009, 09:08 PM   #16
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Default did you get the photo

Rotrex[
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Old 05-27-2009, 09:20 PM   #17
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Sorry about the poor photo if you go to Bullet Cars: Supercharger Kits & Installation, Performance Parts, and manufacturers of the Bullet V8 Supercar, while it is not my car, mine has 3 more KW's and more torque,you will find a better photo and dyno sheet.
OD
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Old 05-28-2009, 04:20 PM   #18
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Quote:
Originally Posted by vehicular View Post
That said, big power centrifugals are... a pain in the *** at best. My buddy's 97 Cobra makes 600+ through a C4 and a 9", and it was nigh un-drivable. It made so much power on the top end that you couldn't shift it fast enough with the 5 speed to stay out of the limiter, and every time you hit the limiter it would toss/ shred the belt (10 rib aftermarket setup, aftermarket tensioners, etc). For a medium power setup, I could see it being fun, but I can't ever see it being economical...
Are you talking about 2 different transmission setups in your buddys Cobra? A C4 is a 3 speed automatic...
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Old 05-28-2009, 04:53 PM   #19
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Quote:
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Are you talking about 2 different transmission setups in your buddys Cobra? A C4 is a 3 speed automatic...

Sorry I was unclear. He had a TKO600RR and a Spec twin plate, but swapped to the C4 so that he could get the thing down the street. When I say it was undriveable, I mean you could barely get it to the store without tossing the belt unless you absolutely babied it... It was a blast if it didn't belong to you, though, lol.
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Old 05-28-2009, 04:56 PM   #20
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BTW, we used a Rotrex on an FSAE engine project in ~2005, and while the engine package sucked, the blower sounded siiiiiick.
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