We have been busy preparing for the upcoming SEMA show in Las Vegas (November 2-5). Our Twincharger Kit has completed final testing and will be released as a production kit at the show. We have spent an enormous amount of time testing and fine tuning the turbo header and downpipe design and turbo combination. Our hard work has paid off as we have met all our targets of improving horsepower and torque while maintaining reliability and driveability. Boost levels have been maintained at 20PSI on our project MCS and other than larger injectors, the engine and drivetrain are still STOCK!
We plan to drive the SPI MCS over 2200 miles to the SEMA show. This will allow us to continue our pursuit of perfecting and developing products as well as showcase the amazing performance transformation the Twincharger Kit does to a stock MCS. Plus, this will give us another excuse to drive the MCS. This car is a blast to drive!

This dyno sheet shows the improvement between the latest CAD designed turbo manifold and downpipe combination with custom Garrett GT turbo and the original header, downpipe, and turbo combination. What is really exciting is not just the increase in peak hp and torque, but the dramatic increases across the entire powerband due to improvements in our designs.



This graph includes our base 2002 MCS dyno run.



Our first run of Twincharger Kits will be limited so please contact us if you are interested in pre-ordering.
We can be contacted by phone or email:

SPI Powerexcel
sales: 732-290-2213
email: info@spipowerexcel.com

 

Cost?
Availability (lead time)?
Is the Kit "all inclusive" for complete installation?

Thank you

 

Don't forget the dyno video!

Any word as to whether this can be used on a 2005 without problem? I'm not sure I want to consider that much hp, as wheel slip must be horrendous, but I'm curious nonetheless.

-mike

 

WOW!

How much for that kit?

 

Oooooooooooh!

Pardon me, I've got to go see just how many Harley parts I've got sitting around that I can sell........

 

I BELIEVE less than the JCW. My next MINI in less than 2 yrs will be a stripped down Cabrio (I think) with LSD and the Helix/SPI kit.

WOW! That's 300hp and 290 torque at the crank! Versus 200-210hp and 177 torque for JCW.

As for the wheel spin, they actually limit the boost a bit in 1st and 2nd gear so the power doesn't come on faster than it is able to be used. I think 3rd gear is the earliest gear that "allows" full boost.

 

Does Alta or Helix sell a stock size pulley so I can go back to stock? Just trying to prepare early....

 

Here is Dyno video. Please be patient while loading. May see blank screen for a while.


http://spipowerexcel.com/newimages/spi%20mcs%20dyno.mpg

Hold your ears

 

Helix does, yes.

 

I think the setup and numbers look great. But man, if you are even the slightest bit squemish about your warranty, this is not the setup for you. I think you would have a hard time arguing anything with the dealer on this one.

 

but this really does seem like a really sweet setup

 

I will be looking for the car at Sema!!!! I really want to get this kit. I'm already getting the stock size pulley. The video left me in shock, I mean the power to weight ratio on the car would be amazing. Bye Bye M3s . Can't wait for it, I'm already getting anxious.



Danny

 

The power to weight ratio will be a little better than an SRT-4. The SRT-4 puts about the same power to the wheel, maybe the SRT-4 has a little more torque. The weight of the SRT-4 is 2970lbs. I would guess that this kit would bring the MCS to about 2700lbs.

 

Is this thing producing 20psi total boost or 20psi from the Turbo and about 11 psi from the stock SC for about 30psi of boost? Just seems strange to me that 2psi more than a 19% pulley produces another 100hp....

 

thats a lot of psi's

 

20PSI total boost.


Why?!!!!! it is a Turbo and a Supercharger

 

cars.com only lists the srt-4 at 230hp?

http://research.cars.com/go/crp/summ...5&modelid=6948

 

Let's see. They come out with a 15% pulley and sell that to the consumer. Then they come out with a turbo kit which doesn't require the pulley, and they sell that. Then they redesign stock pulleys for all the people who just bought their 15% pulley, and sell that to the consumer. Then they create a stage two turbo kit, using 5% reduction pulleys and sell those to the consumer.

This is a great business.

I am saying this with tongue in cheek. But I wonder if the next step would be a lower % pulley, maybe a 5% or something. The numbers look great, but I am thinking that many people will be bored with this setup after a few months.

 

Nice area under the curve.


You guys haven't done ANY drivetrain mods? Not even upgraded the clutch?

 

why change the 15% pulley? no need to.... maybe if you have the 19% pulley but this sounds like a high quality kit and put together well

 

It's 20psi TOTAL. The stock pulley gives around 11 at redline and the rest comes from the turbo. As for the 2psi more...here's your answer. By having both supercharger AND turbocharger, you get the best of both worlds. First there's no turbo lag as the supercharger gives boost and power at lower RPMs. So you have the supercharger advantage down low. HOWEVER, a turbocharger is better at higher RPMs - the turbo gets its boost for "free" by using exhaust gases to turn the turbo. A supercharger at high RPMs is causing a lot of drag on the engine at high RPMs. Say for example, the 19% supercharger needs 50hp to create 16-17lbs of boost at redline. A turbo loses nothing! So by using the stock pulley versus a reduction pulley, there is a lot less HP lost at high RPMs and the extra boost is made up and then some with the turbo. That's how 20psi can give you both 300hp and 290lbs of torque at the crank!!!

I can't wait for my next MINI!

 

Of Course the pully will change! And this isn't a business scam. think of building a nice naturally asperated motor, and then getting a supercharger. If you keep the nice high compression ratio, and the advanced timing with the new blower, you get holes in your pistons!

Also, in business, it's common to start with a "base" level, and learn from it and come out with "enhanced". That's called continuous improvement. And we're all better for it.

 

B/c then you'd be running about 24lbs of boost. Probably considered too much for this engine. Plus you'd still be better off running a stock pulley and tuning more boost from the turbo I think. Less engine drag at high RPMs.

 

Turbo's don't get their boost for free. You exchange crank HP for exhaust backpressure when switching between SC and Turbo. Plus SC aren't always the best for down low torque because they build boost linearly to RPM's so at low RPM's you get low boost and high RPM's is the only place you get full boost. I'm not doubting the claims of the Twincharged system, just trying to understand. 20lbs of boost is 20lbs of boost no matter where it comes from and can only produce so much HP since that boost is determining the amount of air you have and thus the amount of fuel burned. So the only difference between a SC that puts out 20psi and a Twincharged that puts out 20psi is the cost it takes to get that boost and it suprises me that it would 75-100hp difference.

 

Hey Super_MINI I think you are a little confused on how boost works. First off, if you have 2 power adders, i.e. a turbo and a supercharger you can't just add the two pressures from both sources together to determine the final relationship. Second, if there really was 20psi just coming from the gt28r turbo, Hubie would have made a lot more than 265hp. Those can put out close to 300 on that boost level.

Air at the atmospheric gage pressure (0 psi) enters into the turbo and gets compressed and heated up. That hot compressed air gets heated up one more time and compressed one more time within the supercharged and passes through the IC where it's cooled down and experiences some pressure drop. It's harder to compress air from 11 psi to 20psi gage pressure then it its to compress it from 0 psi to 11psi. So if he makes close to 12psi at the turbo, and being heated and compressed 20psi coming out seems very reasonable, even though a stock one can create a high pressure change its dealing with a less dense, colder air.

Ok last thing, just because someone has say 25 psi, doesn't mean they hit a certain HP level. 25psi coming from a tiny gt15 turbo wouldn't be the "same" 25psi as comign from a giant t88. What you have to look at is the amount of air flowing into the head, the mass flow rate. Which isn't just a function of pressure, but velocity and crosssectional area.

Hopefully that clears it up some.