We are pleased to announce the GTM Stage 2 Supercharger Kits line-up for the for the VQ platform. The Stage 2 uses the biggest supercharger unit in the Rotrex Line-up, the C38-91. This unit is capable of flowing 82lbs/min of compressed air and is able to spin to 90,000rpm (higher rpm than any other supercharger on the market). The Rotrex supercharger’s unique traction drive also has the highest drive efficiency of any other blower with 98.4% efficiency which means less parasitic losses than traditional gear driven blowers allowing for better fuel economy when your foot isn’t buried in the throttle.

In order to fit the granddaddy of Rotrex blowers and our massive intake in the tight confines of the 370Z Engine Bay, the Stage 2 Kit comes with GTM Polyurethane Engine Mounts. The advantage of the stiffer motor mounts in addition to the clearance it affords is the increased responsiveness of the car, making it easier to maintain traction with good pedal modulation. With all the torque made by this supercharger kit, you’ll be glad you have these mounts to keep the engine from rocking around your engine bay.

Once we found room between the blower, the newly designed engine mounts, the subframe, and the fender, there was only one component left to consider: the factory exhaust manifold. The beauty of the factory manifold is that it is actually very well insulated and has heat shields to keep the under-hood temperatures low. Not ones to cross our fingers and hope for the best, we added a plethora of sensors to monitor air temperature at various points in the system.

We placed one air temperature probe in the supercharger intake, one in between the supercharger outlet and intercooler inlet and finally using the factory AIT sensors in the MAF’s after the intercooler. We logged temperatures driving around town, flogging it on the dyno and sitting in traffic in the hot Southern California summer. The result was that the proximity of the supercharger air intake to the factory exhaust manifold had no effect on IAT’s. In fact, we found out just how effective our air-to-air intercooler really is. We logged 203 degrees Fahrenheit after the Supercharger and 95 degrees after the intercooler! That’s a 108 degree drop!

To keep the whole system operating well at high horsepower levels, we are including 3” MAF housing in the intercooler to throttle body pipes. This prevents the MAF sensors from getting maxed out by all the airflow the C38-91 Supercharger pushes through the system.

ROTREX SUPERCHARGES

The key to the Rotrex supercharger is unique compactness, efficiency, low noise and reliability and 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 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.

GTM Supercharger kit stages

The GTM Supercharger kit has two different Rotrex compressors to chose from: the C38-81 trim and the C38-91. Combined with our custom compressor housing we will offer three different stages .

Stage zero up to 450 HP (CARB approval in progress)
Stage one up to 500 HP
Stage two up to 600 HP

All of our Supercharger kits are available in two forms. The tuner kit form, so the professional and the end user have the flexibility of choosing what ever fuel and engine management they may desire and feel comfortable using. The second option being a complete kit including fuel and engine management solutions. With that being said, GTM will also offer an extensive range of fuel system and engine management modules to go with our Supercharger kits.

Below is a description of all the components of the GTM STG2 kit :

-Rotrex C38 supercharger
-GTM compressor housing
-GTM Supercharger Billet aluminum brackets
-GTM billet aluminum Sc pulley
-GTM supercharger cooler kit
-Rotrex Supercharger Traction fluid
-4-Ply High Resistance Nomex Silicon couplers
-Stainless Steel T-Bolt clamps
-2.5 x 10 x 24 Bar and Plate Core Intercooler Rated @ 700hp
-Polished aluminum IC Piping
-3” MAF housing
-GTM Oil Filter Relocation Kit
-4.5” diameter Air Intake System
-Turbosmart Bypass Valve
-Pre-made steel braided oil and P.S Supply & Return lines
-All Necessary Hardware and Installation Instructions
-GTM Custom mapped plug and play engine management for optimum engine tune and power .
-GTM Basic fuel system with Bosch EV-14 650CC Injectors and - Walbro 255 Fuel Pump .
-GTM Fuel Pump Voltage Stabilizer Kit
-GTM Custom Drive belt By Bando
-GTM Heavy duty Belt idlers


Some Key points about the GTM supercharger kit

After literally installing and tuning every supercharger kit available for the VQ platform and seeing their short comings, we got the inspiration to develop a kit superior to all others. Problems with the other kits that we wanted to address with our own include: not supplying a descent amount of power, belt breakage and slippage, obnoxious gear lash noises, limited power expansion and lack of the OEM look. Some of the key things we did to achieve our goal are:

SUPERCHARGER NOISE : We chose the Rotrex unit, a very QUIET supercharger compared to anything else on the market .

SUPERCHARGER BRACKETS : Our supercharger bracket is 3 dimensional made out of of thick billet aluminum to prevent any flexing, we also mounted the supercharger unit as close as possible to the engine to limit the amount of flex possible, as well as keep the belt length down between pulleys.

BELT AND TENSIONER DESIGN : We have over 80% belt wrap on our supercharger's pulley and with utilizing the factory automatic belt tensioner over or under tightening is simply not possible.

POWER EXPANSION : Changing the pulley on the super charger is less then a 20 minute job

AESTHETICS : The GTM Supercharger kit maintains the clean OEM look

ENGINE MANAGEMENT: With using the GTM flash we are to able to maintain the OEM drive ability so the car will run like stock, only with a lot more power.

POWER DELIVERY : The GTM supercharger is best bang for the buck
out of the box .

 

Here is the pics of the GTM SUPERCHARGER KIT and some of its major components

Pics of the GTM SUPERCHARGER Kit's components installed

Difference between the factory engine mount and the GTM mount

 

At GTM PERFORMANCE ENGINEERING, we believe in taking every step we can to ensure that our clients receive the most out of our forced induction systems. Offering a complete solution is paramount to maximizing the reliability and health of the forced induction systems that we offer. Not only do we offer the best systems on the market, but all supporting modifications necessary to protect our customers’ investment. below is a list of all the support mod that we offer

GTM OIL COOLERS SUPPLEMENT KITS

GTM Oil Cooler Supplement kits are offered in two different ways. One which includes a thermostat and one without. These kits are sold individually without an oil cooler. This allows you to utilize your previous investment of an existing after-market oil cooler.



GTM AUTOMATIC TRANSMISSION COOLER AND SUPPLEMENT KITS

The GTM Automatic Transmission Cooler and Supplement Kit will allow the car with the automatic transmission option to install and connect an oil cooler without any problem.


GTM COMPETITION RADIATOR WITH DUEL OIL COOLER OPTION .

It is common knowledge that the VQ37VHR has issues with oil temperatures. At GTM, we believe that this is due to the very limited cooling capacity of the coolant system. The VQ37VHR is a hot-running engine by design. Given the fact that the electronic fans do not engage until 100 degrees Celsius (212 degrees Fahrenheit), adding 100 WHP to the engine as well as an intercooler in front of the car and the results become very predictable – overwhelmed coolant system and uncontrollable oil temperatures.

Our approach to this problem is little different. Instead of solely utilizing oil coolers to help alleviate oil temperature issues, we recognized the additional need to increase the cooling system capacity and installed a massive radiator. The factory radiator, which is less than 22mm, is wholly insufficient. In this case, we opted for a 70mm radiator with a much better fan shroud. To take full advantage of the larger radiator, we inserted a heat-exchanger in the return (cold) side. This helps stabilize the oil temperatures by substantially lowering the coolant temperatures. When used in conjunction with the GTM air-to-air oil cooler, a much cooler running engine is noted.


Water/meth injection

This is a great recommendation sense Water/ Meth injection offers some great advantages in any force inductions system, from cooling the air charge to increasing the octane rating. So we are offering 2 different system to complement the stage 2 supercharger system, both system are a complete plug and play systems with two different operating capacities.

One system by Snow performance, very straight forward to install and works off a simple boost input to inject the right amount of mix into the system and another system that is a Little more sophisticated by aquamist that utilities not only boost reference but also IDC (injector duty cycle) input, This system is great for direct port system or injecting before and after the super charger head unit .

 

Forced Induction and Automatic Transmissions

One of the most common questions regarding aftermarket forced induction and an automatic transmission is: Can they work together? It is not a simple answer as the end user often doesn’t understand the intricacies of the automatic transmission and how the increased power from a forced induction system affects the internals of the transmission.
Lets first start with understanding how an automatic transmission works. The transmission uses a series of clutch packs to engage and disengage each gear. Unlike a manual, each gear has its own set of clutch packs. An automatic transmission uses fluid and solenoids inside the valve body to direct hydraulic pressure to the appropriate piston to engage a clutch pack to engage a gear. It is important to
note that automatic transmissions require special fluids with specific properties such as viscosity to move through the intricate components of the transmission. To learn more about how an automatic transmission works visit the following website for a play by play on how it works:

http://auto.howstuffworks.com/automa...ansmission.htm

When power is increased beyond the safety factor the OEM uses, the intricate components are affected in multiple ways. First, increased power results in additional friction and viscous shear thus increasing the temperature of the transmission fluid. When the fluid is heated beyond the optimal temperature, the viscosity (fluid’s resistance to flow) is reduced. This reduction in viscosity prevents the transmission
from operating correctly. In addition, the higher temperatures cause the fluid to degrade and break down into smaller molecules further reducing the viscosity. It is important to note that the fluid not only serves to operate the clutch packs, but lubricates the gears and other moving parts as well. Therefore, adding additional power requires a heavy duty transmission cooler to keep the fluid at its optimal operating temperature.

Generally, when an OEM designs a transmission, they have a specific torque capacity in mind and use this capacity to specify the number of clutch disks used in each clutch pack. The valve body is also programmed to operate these clutch packs in a specified manner. For example, when cruising in 5th gear on a 5 speed automatic, the transmission will only downshift to 4th gear when a certain amount of
pedal pressure is applied for a certain amount of time. Because 5th gear is used mainly for cruising, there are less clutches in the clutch pack and therefore, the ultimate holding capacity is less than that of the lower gears that are used more for accelerating. In the case of a 7 speed automatic, both 6th and 7th use fewer clutch packs with 5th being a transition gear still using fewer clutches than 1st – 4th. When
more power is added, more load is placed on these clutch packs. One way to prevent premature wear of the clutch packs is to modify the valve body to increase hydraulic pressure so that the transmission will downshift more readily. A modified valve body also shifts faster and slips the clutches less to achieve a firmer feeling when the transmission shifts. This keeps the transmission in lower gears when
you are trying to accelerate the car with more torque. On the new 7 speed automatic, line pressure can be increased by reflashing the ECU. When going for serious power, however, increased line pressure simply isn’t enough.

Even with a heavy duty transmission fluid cooler and valve body upgrade, more than doubling the factory rated horsepower requires more extensive work to keep the transmission working well. In this case, it is necessary to overhaul the transmission and replace the clutch packs, pistons that actuate the clutches and drums that hold the clutches with high performance versions. The drums must be enlarged to accommodate additional clutches and a more aggressive friction material must be selected for the clutches themselves. In addition, the piston diameters are increased to apply additional force to the clutch packs. While these modifications increase the holding capacity of the transmission, it is not indestructible as there is only so much room for additional clutch packs, larger drums and pistons.

Ultimately, care must be used when driving a vehicle equipped with an automatic transmission and aftermarket forced induction. When accelerating in a high gear, damage can result with the additional torque. Therefore, it is vital that the driver is aware of the limitations of the transmission and downshift when they want to accelerate. High speed runs at full boost in high gears is inadvisable with an automatic transmission, modified or otherwise. Remember that the transmission was not designed for those operating parameters.

This doesn’t mean that forced induction cannot be added to an automatic transmission equipped car,just that care and caution must be exercised in addition to supporting modifications appropriate to the power level achieved.

Having said that,From the beginning of the year we have been working very hard on completing our 7-AT trans upgrade solution. And we are very proud to announce that it is done, In summary we were able to offer different levels of improvement on the 7-AT trans in every gear, from 20 % torque capacity increase and all the way to 50%. stay tuned for a complete press release .

Here are the pics of all the new improved parts .

 

In any new product, there is always some challenges to over come and some kinks to work out, So the next step was to perform as many installs as possible in our facility to ensure repeatability and consistency in our product and the results were amazing every single time, Bottom line what you see is what you get .

Here is a list of all the stage 2 kit inhouse installs with results that we have done in the last 60 days.


This Vehicle was one of early adopter of our supercharger system, The stage one kit was tested and fitted on this car and completed then customer opted for the stage 2 system witch allows us to have a great comparisons between the stage 1 and the stage 2 system on the same car same dyno. Also we do number of videos of the car in action witch we will sharing shortly .


2008 INFINITI G37 COUPE 6 SPEED MT

-GTM STAGE 2 SC TURN KEY KIT
-SNOW PERFORMANCE METH KIT
-OS GIKEN TWIN PLATE CLUTCH
-GTM 19 ROW OIL COOLER (thermostatically controlled)
-FUJUSTUBO REAR MUFFLER
-GTM Y PIPE
-F/I HIGH FLOW CATS

 

This customer drove all the way from CANADA for the install. Customer was on vacation with his family while we were installing the SC system with some other goodies . install was completed successfully with great results.


2007 INFINITI G35 SEDAN VQ35HR 5 SPEED A/T

-GTM STAGE 2 SC KIT TURN KEY
-GTM 19 ROW OIL COOLER (thermostatically controlled)
-GTM 19 ROW TRANS COOLER
-GTM VALVE BODY UPGRADE
-STILLEN CAT BACK
-STILLEN HIGH FLOW CATS
-DEFI BOOST GAGE
-BLITZ DS R-VIT

 

2009 370Z CONVERTIBLE 6 SPEED M/T

-GTM STAGE 2 SC KIT TURN KEY
-SNOW PERFORMANCE METH KIT
-OS GIKEN TWIN PLATE CLUTCH
-GTM 25 ROW OIL COOLER (thermostatically controlled)
-FACTORY CATS
-INVIDIA CAT BACK
-KW VARIANT 3 COIL OVER

Customer flew in and drove the car back to ST.Louis Missouri,without a single issue, here is the link to his trip back home

PICS OF THE CAR

 

2009 NISSAN 370Z 6 SPEED M/T

-GTM STAGE 2 SC TURN KEY KIT
-GTM IC TEMP GAUGE
-STOCK CLUTCH
-GTM 25 ROW OIL COOLER (thermostatically controlled)
-GTM RESONATED TEST PIPES
-INVIDIA CAT BACK
-PLX DEVICE GAUGES (afr and boost)

This car currently is in Hawaii Here is a link to customer latest updates on the car


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PICS OF THE INSTALL

 

2009 NISSAN 370Z 7 SPEED AT

-GTM STAGE 2 SC KIT TURN KEY
-GREDDY TIC CAT BACK AND TEST PIPES
-Due to time restraint no oil cooler were installed

UNDERDRIVE PULLEY is a bad idea all the way around for few reasons :

- Despite what anyone says about this engine being internally balance and removing the harmonic balancer does not have any effect on this engine is totally false. So by removing the harmonic balancer (witch is made from two part metal and rubber in the middle bonding them together for the sole purpose of absorbing engine harmonics and vibrations ) you are destroying your engine .

- Further more by installing the lighter aluminum pulley, keep in mind that aluminum is softer then harden steel (crankshaft) you are also taking a chance of either killing your crankshaft or being unable to ever remove the underdrive pulley sense with time it will weld it self to the crank. and here is exactly what happened in this case, So we had to remove the whole front end, radiator support, a/c condenser so we can put a big enough air gun to brake loos the bolt and still had hell of time to do so .

Also I'm quoting the same info from the web

 

And for the final in house install, It went to a 2007 350ZHR Here is the list of mods.

2007 NISSAN 350Z VQ35HR 6 SPEED MT

-GTM STAGE 2 SC KIT TURN KEY
-FACTORY CATS
-BORAL CAT BACK EXHAUST

PICS OF THE INSTALL

 

As we have shown with all the in house installs taht the stage 2 system delivers the power very consistently on the stock engine every time and without a glitch, So the next logical thing to do is to test it on a built engine with a larger displacement and more boost .

So allow me to introduce our next G42 project car with the fallowing mods and stay tuned :

2009 INFINITI G37 SEDAN 6 SPEED MT

-GTM 4.2L STROKEER SHORT BLOCK (11.0: 1 COMPRESSION )
-GTM STAGE 1 CYLNDER HEADS
-GTM STAGE 2 SC KIT TUNER KIT
-GTM COMPETITION RADIATOR WITH DUEL OIL COOLER
-GTM RETURN FUEL SYSTEM
-OS GIKEN TWIN PLATE CLUTCH
-AQUAMIST DIRECT PORT INJECTION
-GTM FLASH


Shipping

Shipping the stage 2 kit have started last week, We are shipping kits on first come first serve bases.

Install instruction link

http://www.gtmotorsports.com/Manuals...structions.pdf

Install time Required

20 Hours (A Grade tech level)

PRICING

-GTM 370Z 600HP STG2 SUPERCHARGER (TURN KEY) KIT introductory Price of $ 7718.00, Here is the link to our website

GTM Motorsports**FORCED INDUCTION**Supercharger Kits**GTM 370Z 600HP STG2 SUPERCHARGER (TURN KEY) KIT


-GTM 370Z 600HP STG2 SUPERCHARGER (TUNER) KIT introductory Price of $ 6660, Here is the link to our website

GTM Motorsports**FORCED INDUCTION**GTM 370Z 600HP STG2 SUPERCHARGER (TUNER) KIT

 

Bout time you posted here.

 

Those are some nice numbers there!

 

yeeeeuuhh!!! i've been VERY excited for this press release. i'm a-savin'! lol nice work sam!!!

 

I am so happy this kit turned out the way it did and is ready to turn our cars into what they should be! Thank you GTM, I cannot wait to place my order!