GTM Performance Engineering:PROJECT: VQ42VHR S/C

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Direct Port Meth Injection HSF-4
Extracting maximum power from our Stage 2 Supercharger with 11:0 compression requires serious detonation resistance that 93 octane pump gas simply can’t provide on its own. As a result, we did a direct methanol injection system that has one nozzle on each intake runner on the lower intake manifold plus a seventh nozzle in the intercooler inlet. By injecting water/methanol directly at the ports, the intake ports and valves are kept cooler, thereby transferring less heat to the incoming air as it is ingested. Not only is the intake air charge as cool as possible, but the water/methanol injection’s octane boosting properties gives this setup the detonation resistance it needs to make monster torque and solid power reliably and consistently.

Pics of the install

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Exhaust System

Going for big power means seeking out and eliminating restrictions wherever possible. To this end, this monster exhales through a set of GTM test pipes and our GTM 2.5” cat-back exhaust. While one would expect a lot of drone with test pipes, our cat-back exhaust keeps the volume at a tolerable level while delivering a nice low rpm growl that transitions to a tight howl at high rpm with a signature VQ soundtrack. Constructed completely of stainless steel with an X-pipe that excels at scavenging the VQ’s exhaust gasses, this exhaust complements the supercharged VQ very well.

Pics of the system ...

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Competition Radiator

Battling the heat generated by the big displacement motor with a big supercharger strapped to it is our GTM 70mm Competition Radiator and fan shroud for the factory fans. With its extra capacity and massive cooling ability, this car has no problem keeping cool even on the hot and humid summer days of its Southeastern home. By setting the fans to come on at a lower temperature, we are able to prevent the system from trying to play catch up with high coolant temperatures when the car is pushed hard for long periods of time. Even with the big radiator, the threat of high oil temperature still looms when pushed to the limit. To make that worry disappear, we’ve added our GTM Oil Cooler and supplement kit with an inline thermostat to ensure quick oil warm up in cold weather

Pics of the system

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HKS CAMP2

While it’s all good and well to have the best setup in town, it is always a good idea to keep tabs on the health and performance of a high powered build. The HKS CAMP2 combined with the HKS Knock AMP’s air/fuel readings were installed to monitor engine vitals and display them on the factory navigation screen. Another nice feature of the Knock Amp is it’s knock warning system that alerts the driver to detonation.


Traction Control

With a mountain of torque at the driver’s disposal only a jab of the pedal away, something had to be done to prevent the car from violently shredding its tires. With our GTM Plug and Play Traction Control System in the mix, wheelspin is minimized while allowing for maximum acceleration without the bogging the factory VDC causes.


Clutch


Even though the factory clutch can hold a lot of power surprisingly well, the 4.2L engine in this car really needs extra clamping force to get that torque to the rear wheels. Making that connection is an OS Giken Twin Disk Clutch and Heavy Duty Concentric Slave Cylinder.

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Final finished product