Rotrex anyone?
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Joined: Oct 2007
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From: Rancho Santa Fe, CA
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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I got a ride in the Rotrex car @ Miatas@MRLS 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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I got a ride in the Rotrex car @ Miatas@MRLS 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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Joined: Oct 2007
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From: Rancho Santa Fe, CA
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.
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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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...
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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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...
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...
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.
/threadjack.
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Joined: May 2009
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From: Queensland Australia
Photo
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
OD
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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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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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