GT Motorsports: 370Z Supercharger system development
 

We are please to announce The GTM supercharger system Development for the 370Z . The GTM supercharged 370z project was under way back in the begging of the year .

Since we are completely done with our twin turbo system development that was released last month, We will be focusing on the the supercharged system. We are committed and planing on displaying both of our force induction system Solution for the 370Z @ sema 2009 .

Our GTM supercharger system will be utilizing the Rotrex C38 supercharger, The Key to the Rotrex supercharger's unique compactness, efficiency, low noise and reliability is its state of the art traction drive technology.

Great speeds and low noise are just some of the advantages of traction drives over traditional gear transmissions. Traction drives transmit power through friction forces between its rolling elements.

The Rotrex patented traction drive uses an elastic annulus with a small pre-span to secure contact between the roller planets and the sun shaft with a reasonable force. The patented "ramp effect" increases efficiency and reliability in the transmission by regulating the torque transfer capability on demand through self-adjusting planet geometry.

To enhance performance, the Rotrex traction drive uses a special traction fluid. These fluids are a new family of synthetic hydrocarbon oils and greases offering a series of unique performance advantages. Developed specially for its use in Rotrex superchargers, the SX100 momentarily increases viscosity under high surface pressure, enhancing the traction drive performance by securing the optimum friction between rolling elements while cooling and protecting the system.

This traction drive combined with the latest technology in centrifugal compression, characterized by high adiabatic efficiency and low noise, gives Rotrex superchargers an exceptional competitive edge over any other forced induction solution.

The GTM Supercharger Will Have three different stages to offer

Stage one will come with C38-61 Trim up to 550 HP
Stage two will come with C38-71 trim up to 590 HP
Sage three will come with C38-81 trim up to 630 HP

Here is some pics of the the Rotrex C38-61


And here is some pics of the progress of the car,Enjoy the pics and more updates of the progress to follow.

Sam
GT Motorsports

In for results

Very nice...looks like a turbocharger..lol. Whats the price range of this kit?

Cost has not been set yet since we are still in development, It will be competitive .

Sam

wow... nice kit........... can't wait to see prices and vids

Subscribing!!

Ohhh this is so going to be at the top of my to do list! :happydance:

subscribed! also, i think rotrex is OFF on their blower sizes / HP ratings. i had a c32 on my old tacoma, and had to significantly overspin it to get it even close to the rated HP. just based on that, i would opt for the largest one, to get the heat down.

i also had two freeze on me :icon14:

either way, i am very excited to hear the results!!!

Exciting news - in for results also

If this is the route i take with my 370z im defently doing this...with my meth kit this will be awesome!

I just am thinking that with a kit like this, if it really is capable of making 600+, then I might want to build the bottom end...

OMG!...this is exciting

Subscribeeddddddddddddd

WOW !!! What a wonderful surprise!
-Subscribing

I have 2 questions:
1) Isnt the cost of the Rotrex pump about twice the cost of a Vortech or Procharger?
2) Will the location of the pump reduce it's efficiency from the heat coming from the exhaust, or can that be completely negated with an intercooler?

Thanks,

Looks great!

When it comes To designing a supercharger system choosing the right size blower is really the key for an efficient system, Just the right size not too small where you have to overspin the blower and then you start having premature failures and you air charge temp goes sky high, Or too big and where you never reach the sweet spot of the blower .

Let me say this, Choosing the C38 blower made this system a lot harder to fit and to design as you see it is not a Small blower. If we could have chosen the C30 blower instead, we could have done with system by now .

The beauty about the C38 blower is that you can upgrade from stage 1 to stage 3 without having to change the outside physical dimension, it is all done internally .

Having tuned and build so many VQ37VHR engine i know making 400-430 WHP on our GTM SC STG 1 is very doable

Stay tuned

Sam

The Rotrex blower is more expensive but not twice as much, At the end of the day you get what you pay for .

Now for the blower location the factory manifolds are very well shielded so we are not really worry about that, only one way to know, A lot of testing and data logging .

Sam

What if we are upgrading those factory manifolds...:confused:

The blower is not really that close to exhaust manifold, I will have to take some better pics of that area and in the event you do have after market headers, I would recommend the Thermo-Tec Exhaust Insulating warp, it works very well

Sam

Ahhhhh.. Sh#T.. .WTF 500+WHP with a supercharger.. I had planned to go TT since start... now I'm lost... what am I to do? Guess If i got supercharger I could start buying all the boltones that I have been holding off on

Thanks for the response Sam. I was thinking of wrapping the headers anyways but good to know that there should be sufficient space. :D

I'm loving this kit, I really can't wait to see this thing get set up and see some vids.

When it comes to choosing between a super charger or a twin turbo, It really comes down to personal preference. For me a twin turbo is what i would choose :D

I'm glad that we can offer both options

Sam

Turbos would be a blast i'm sure, I just feel like a Super would be a wiser choice for a car that will be daily driven 10k+ a year...

either way it is great that you guys offering both

what would be the advantage of going turbo vs supercharged in your opinion sam?

Turbo will have potential for way more power, most likely

We start installing twin turbo system on 350z back in 2003, To this day we have customer that are still running with the same system, same install and over 70 k of boosted millage.

So again It really comes down to personal preference :D

Sam

Well in that case.. it might be a consideration still :happydance:

+1

Our turbo system have 6 different stages with nine different turbo options ,so you can start with 500WHP Stage 1 kit and go all the way to 1100 WHP + stage 6 (duel GT35R'S) with the same kit just different turbos, you could not do that with a supercharger

Sam

for me the big winner is price. generally you cannot get a working turbo under 10k before you start with the supporting mods. with a s/c, you can start off mild, and slowly up the boost and parts like clutch ect.

i would hope the kit is in the 5-6k range, just as my complete rotrex blower for my tacoma was.

Sam do you recommend sticking to 2.5" exhaust piping or upgrading to 3"?

I don't even want to imagine the loudness of that thing!!

subscribed...keepin my options open

Sam
Thanks for clear updates. I appreciate the HP range you are shooting for and pics of development. I have been trying to get this from Stillen. Do you have a time frame questimate? Will your supercharger system have problems with the 7sp AT? Will any mods need to be done to the 7AT? Is an oil cooler included? I am not familiar with the blower you are using. I have used vortec and with this motor I am concerned that the boost is not very "streetable" little low rpm torque gains. Will your blower be similar? or more like a roots style? Thanks again for the information. IT looks like you are going to take my business from Stillen...
John

The HP numbers that GTM is shooting for...Is that to the ground or at the flywheel?

The 2.5 " will be good, In a SC system a little back press is needed.

So i would not upgrade to 3" exhaust if you are considering the SC System

Sam

reading the OP, got a little confused about the noise part. Does this mean this supercharger does not make a whine? lol. Also how much psi of boost does this make on stage 1. I know ill probably have to wait until further tests

If we're seeing around 500whp then I'm guessing somewhere in the 10psi range? And yeah Rotrex wouldn't whine like this comptech setup there



You exhaust note would get much louder though!!

^ I can't say i'll miss that whine, actually it was something I didn't want to hear. Maybe I'm weird but I don't want to hear the whine really. I love the sound of spooled turbos though, that just gives me a flat out erection! I'll have to say that the rotrex until being quiet is a HUGE plus for me. :D

Thank you John

As for time frame We are committed and planing on displaying both of our force induction system Solution for the 370Z @ sema 2009. (Sema 2009 is in nov) .

Now for the 7AT, It is always recommended when installing any force induction system to install a valve body upgrade and a transmission cooler .

The new 7AT from Nissan is a new animal and we do have in our facility right now a vehicle with the 7At that we are doing our research and development so offer our typical transmission upgraded, here is a link to what we offerd for the (RE5 five speed unit )

GTM Motorsports*::*Search results

We have installed and tuned every SC system you can think of ... vorteck, stillen ,hks ,procharger, We chose the Rotrex system because even it is centrifugal blower it uses a traction drive system which makes the blower very responsive and offer a good low end torque so we are getting the best of both worlds, Below is a dyno graph for a GTM HKS stg 5 supercharger system, the HKS unit also utilizes a traction drive system as you can see this car retained it is low end torque even with the centrifugal style blower, this car felt like a v8 it was a lot of fun .

This car is 2005 350z vq35de Automatic (stock engine GTM stg 2 transmission)

Sam

that whine is so sexy though...i never had a turbo set up so i cant say anything about the BOV or spooling, even though it is nice. However that seems to be all you hear on cars these days. Very often do u hear a high pitched whine..lol

I'm guessing this isn't something that can be installed in my own garage. Looks like it could be a great alternative for those of us interested in Stillen's Supercharger kit.