"Not All Boost is Created Equal"
 

Yes, it seems that way....


http://www.kraftwerksusa.com/product...tabasedyno.jpg

So just how much does 157.7 WHP cost these days?

Price: $3,695.00

Kraftwerks USA Products

http://y8spec.com/dyno/miatadyno20050326.gif

4 psi on an 01. yesssssssss.

granted the rotrex dyno is a 5psi peak.

And has zero lag.
And will have a CARB E.O.
And takes about 3hrs to install with lifting the car or tapping into the engines oil supply.
And that same blower will flow enough for 300whp with simple upgrades

You just have to drive one on the track to appreciate how smooth, responsive, linear, easy to drive and just plain fun the power is. Its feels like simply having more displacement, no indication its being forced fed.

For some Miata owners there is more to forced induction than just a dyno figure/dollar ratio.

More specifically, that slogan refers to the exceptional thermal efficiency of the Rotrex. CFM for CFM, more efficient than even a turbo and just plain destroys any PD blower out there. That means leaner mixtures, smaller intercoolers, more timing, less heat soak of intake pipes, less stuff melted under the hood. Fried drive belts are just not an issue either.

Yeah, the Rotrex unit itself is expensive, but its also part of a very high quality kit that will last the life of the car. It's also rugged enough for sustained track use right out of the box. That last bit, you can't say for any other forced induction kit available for the 94-05 Miata. https://www.miataturbo.net/forum/t35874/

The Rotrex systems aren't for everyone, but for some they are the ideal solution.

:drama:

I can't haz big intercoolerz? How will ppl know I have moar powa!

I like it and it may be a good option if I had to do it all over again. But currently no Rotex for 9495. Plans on that? I still think an NA is best base for a track car, no?

I wonder if turbos would have the same stud problems at 6-8 psi.

I can understand the zero lag part of it, but that's pushing it, the rest is a convenience factor. I have a turbo setup that can make 300rwhp, but I'm only running either 190rwhp or 230rwhp depending what position a certain toggle switch is.

You gotta fly me out! I would be very curious to drive one. I can make my own setup have a pretty linear power deliver too, However I much prefer it in torque mode: http://i46.photobucket.com/albums/f1...g?t=1248962485

I'm not even looking at it from that prospective. I thought the whole Rotrex buzz was the instant torque from the crazy planetary drive system. Ever dyno I've seen is fairly disappointing in that aspect as well as the hp per psi aspect. But like you said, you're the one out there with them on the track so you have a better prospective.

Would the same car with a 160rwhp turbo setup vs the above Rotrex setup really be a worse track car? Assume you don't have loose stud syndrome, couldn't you only benefit from the low/mid-range torque?

To be honest Emilio I didn't even know you were associated/reselling these kits. That says a lot that you like them, I'm just not sold yet. I'm not trying to start a debate or dog your product, but I just don't see the appeal really.

I love how it's always "but there's no turbo lag". A friend of mine has a supercharged 99 miata, and I absolutely hate the powerband. Sure, it's this crazy linear power band, but guess what, it's going from low power to high power, over a long period of time. I get full 200 torque at just over 3000 rpm, and full horsepower shortly after. If anything, the super linear power band of a supercharger gives way more lag, because it takes ages to finally get into high power, and once your there, you're out of rpm.

And I think either can be just as predictable, you just need to learn what the car does. If you know you have crazy power at 4000rpm or wherever it is, you'll know that and drive accordingly. Anyways, people like both setups, but I'll take a turbo over supercharger any day.

I like all of Emilio's products I have purchased. They are well tested, I have 3 sets of his wheels.

I have the old MP62 from BRP from around '02. Fun, but makes alot of heat when used on track probably leading to my 2 rebuilds so far.

Rotrex looks like a better design. Either going to try one of those or possibly a big turbo to get some top end when my setup has issues again.

No need to worry Emilio, with electric vehicles entering the scene superchargers will take over the world!!! MUAHHAHAHAHAHA!

I want to see dyno charts with a Rotrex, proper ECU, big injectors and IC pushing 10-12 psi. 5psi on a stock car isn't information anyone here cares about. Let's see what it's like putting some real pressure to the motor. If it's capable of 300hp lets see one at 250 to compare with all the turbo's around here putting out that level.

I know the rotrex is quality. All the FI BMW's and S2000's seem to be running them. We just need to see what they do on our cars at levels this forum would care about.

emilio do you have a dyno chart of your cars setup?

I think that could provide interesting results

Not installed yet.

My particular set up on the OGK won't tell you anything about the production kits though since it's all one-off, custom header, intake manifold, big compression and what not. It'll make around 220whp on the stock motor, then about 270whp once the fully built motor is done. Nothing remarkable for a C30-74. Rotrex's have been put on all sorts of cars with well known power gains. Its only new to Miata owners.

What kind of simple upgrades are needed to stop the torque from peaking at 5400 rpms?

more boost, sooner...

Amen. I've driven 12psi s/c and turbo cars back to back on the autox course. Turbo car made more power, but the s/c car was definately faster. But on a road course, I could see it would be the opposite.