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Track prepped Rotrex Supercharged Miata

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Track prepped Rotrex Supercharged Miata

 
Old 09-20-2017, 04:12 PM
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Thanks Flyer.....I fixed both video links.
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Old 09-20-2017, 04:31 PM
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Car is faaaaast

How are the brakes?
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Old 09-20-2017, 04:55 PM
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Originally Posted by ThePass View Post
Car is faaaaast

How are the brakes?
Stoptech V8r brakes are great! Need to change rear compound to something with less bite. Got some XR4's on the way.

With the 1" master and sport booster they are still a bit touchy for good heel toe blipping. Ideally I would convert to dual manual masters but that's not in the cards right now. As silly as it sounds I am gonna try adding a couple of big springs to give more pedal pressure. Pretty primal but I bet it will help.

Last edited by k24madness; 09-22-2017 at 01:28 PM.
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Old 09-20-2017, 06:52 PM
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I have no issue with standard '89' 1600 master cylinder and the 11.75" fronts with Goodwin (old) v3 rear (same size as sport I believe)..Carbotech/G-lok pads.

In fact I am scared to make any changes because they are that perfect..... but then I like a 15 and 16 mm rear sway bar too....must just be me.
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Old 09-20-2017, 07:36 PM
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Both my front and rear calipers have larger piston volumes than what you're running. It's not a great comparison.

I am serious about rigging up some springs to add pedal pressure. Kinda getto but should help with the problem till I can give it more attention.

Moving onto important things....Working on gear ratios for the new sequential. Plan to pull the trigger this week.
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Old 09-20-2017, 07:44 PM
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Originally Posted by k24madness View Post
I don't have frame rails. It's not allowed in my class.
7.3.2.a.1, right? Greg confirmed? I have a set for Rover, pulled them for PTE years ago but was considering adding them back mostly for ballast.
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Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 09-20-2017, 08:39 PM
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Originally Posted by Savington View Post
7.3.2.a.1, right? Greg confirmed? I have a set for Rover, pulled them for PTE years ago but was considering adding them back mostly for ballast.
Yup that's the one. I even asked Greg for an exception so I can repair my caved in ones. I also explained they were nothing more than floor supports. He was not having any of it. Said they would assess points for the "mod" if I altered them from the originals.

I can forward you the email exchange if you like.

Last edited by k24madness; 09-21-2017 at 10:24 PM.
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Old 09-22-2017, 01:38 PM
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Originally Posted by flier129 View Post
Could this be a ST2 car or is there a component I'm missing that puts it into STU? If it can, I think it could be really competitive, at least in TT2.
Sorry late reply....somehow missed your post.

It's classed as SU just to make things easier as we shake out the car. I crunched the numbers and it will fit in ST2 pretty easy with some tweaks. That class is not that great in my region though. ST3-ST4 is where you want to be for good racing. ST3 looks very doable. ST4 will be tough with the non OEM roofline and pending sequential.

I need to optimize the saline interface over the next few events. That's really what's holding things back at the moment. The extra power and grip helps overcome some of that to make racing more exciting.
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Old 02-04-2019, 03:23 PM
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The time has come to part with my Miata. It's been a long fun road ending with much less usage than I expected. When I started building the ultimate track Miata I was driving 10+ times a year. Lately it's once or twice, I just don't see that changing in the future. The car is soooooo well sorted! It just needs to be driven more!
Most of the build history can be found here in this thread. $25k Tom 415-515-9018

Quick refresher:
TC Design Chrome Moly Cage,
Low hours Rebello Engine, Ported head, SUB, Custom Cams, Supertech Heavy Double Valve Springs,Supertech pistons with Forged rods, Boundry pump (full)Skunk 2 intake. Rotrex C30-74 Super Charger. True 300WHP (E85)
MS Labs MS3 BasicID1300 CC stainless injectors.
6 Speed Trans with TDR Shifter
AST Double Adjustable Shocks 1000/550 Springs,
Ron Davis Radiator with oil cooler.
Racing Beat 1.25" Hollow bar with custom supports
OS Gixen Diff 4:10 gears, Autokonextion Widebody Kit.
Autokonextion Carbon fiber fastback roof,
Aim Pista Dash
2 sets 15x10 wheels
Stoptech STR42 with 11.75" rotor front
Miata Sport Rear with 10.90" rotors
1" 929 Master cylinder, NB Front Subframe, (improved geometry)
Spherical control arm bushings on lower arms and rear upper knuckles,
Delrin control arm bushings on upper arms.
Fuel Cell etc

Tim doing a 1:41.5 at Sonoma (Lap 3)

Last edited by k24madness; 02-04-2019 at 03:49 PM.
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Old 02-06-2019, 01:51 PM
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Originally Posted by k24madness View Post
That is high on the list of changes desired. It's still running stock brakes so that needs to be addressed first.
Can you remember how well stock brakes work on that car? Im building my Rotrex right now and wondering whether it is worth to start with stock brakes w race pads.

Btw, what a shame that you sell it. Congrats to the new owner.
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Old 02-06-2019, 05:09 PM
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GLWS Tom. As near as I can tell, that car is one of the few very well sorted and really fast Rotrex BP powered track cars on the planet. New owner will love it.
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Old 02-07-2019, 03:19 AM
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Great seller selling a proper race car
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Old 02-12-2019, 08:03 PM
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Thanks Guys!
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Old 02-13-2019, 12:55 PM
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This is an a amazing race car! I had the fortune of seeing it in person a few times. No expense was spared.

Tom is a good honest person. Is this still available?
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Old 02-14-2019, 01:08 AM
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Thanks Carlos!

The car car is still for sale. I am working on a proper for sale ad once I get some updated pics.
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