NSX, 1991-05

High horsepower modifications to the NSX have become more common. Increased power increases engine fuel demands. With the introduction of high fow turbine fuel pumps such as the Aeromotive 340 LPH and Walbro 450 LPH fuel pump, customers have the ability to install a fuel pump capable of supplying high horsepower applications using the factory in-tank fuel carrier. Initial testing performed showed the Aeromotive 340 HP pump performing similarly to the lower capacity Walbro 255 HP pump with factory wiring. Upon investigation, it was clear that resistance from the factory fuel pump wiring was causing a voltage drop down to less than 11 V at the pump. The factory wiring consists of wiring between American 16 and 18 ga wiring. Resistance is further increased from the relatively long run of approximately 8 ft of wiring from the power source. Testing was performed using a twin turbocharged 1993 NSX with a maximum total gasoline fuel supply demand of 270 lph at 750 horsepower at the engine. Manifold

ScienceofSpeed has expanded our throttle body options available for 1995-2005 NSX race cars when used with the ScienceofSpeed AEM Infinity Engine Management System.

Three options are now available:

• 65mm: compatible with factory rubber coupler. Ideal for naturally aspirated or supercharged applications compatible with the factory coupler (this is the standard throttle body included in the ScienceofSpeed Stage 2 TVS Supercharger System.
• 70mm: not compatible with the factory rubber coupler. Designed for 3" couplers - popular with turbocharger systems.
• 75mm: designed exclusively for the ScienceofSpeed TVS Supercharger System. Not compatible with the factory intake manifold. Requires the ScienceofSpeed 75mm Throttle Body Kit for

With CT-Engineering's closing in 2018, ScienceofSpeed lost its supplier of components for the ScienceofSpeed Supercharger Kit. The loss of these positive displacement supercharger systems left a big gap in forced induction options for the NSX enthusiast.

Now in development, the following is a technical introduction to the ScienceofSpeed TVS Supercharger System.

BACKGROUND
Positive displacement superchargers for the NSX are unlike any other forced induction system (centrifugal supercharger or turbocharger) in the way they generate instant, low-end torque. Positive displacement superchargers give the impression of small block V8 performance without giving up the 8,000 rev limiter - keeping the characteristics we love about the NSX, but amplifying the engine performance.

The Comptech-based system had a number of advantages, including ease of

How does this system compare to the Comptech/CT-Engineering and CT-Engineering based ScienceofSpeed supercharger systems?
ScienceofSpeed partnered with CT-Engineering in 2007 to develop a high-output version of the CT-Engineering System. The CT-Engineering system produces around 80 WHP and the ScienceofSpeed system around 140 WHP using a larger 2.1L unit. CT-Engineering closing its doors in 2018 required ScienceofSpeed to develop the key components from scratch but have allowed improvements most notably in regards to the intake manifold (click here for more technical details). The improved design allows increased flow, reduced pressure fluctuation, and an optional integrated intercooler. Improvements to the belt drive tensioner system, the ability to increase throttle body size,

The Comptech (later renamed CT-Engineering) supercharger system for the NSX was a popular option for the NSX while the company was in business.

The kit has been in service since the mid-90s. The system produced about 80-90 horsepower and included a screw supercharger and a fuel system that consisted of a rising rate fuel pressure regulator, a voltage booster for the fuel pump, and in later kits, an electronic control module that would add additional injector time. The supplied fuel system pushes more voltage to the factory fuel pump to allow the fuel rail pressure to maintain 80-100 PSI. That's a lot of pressure for the factory fuel pump, and causes accelerated wear to the pump over time.

Because the kit was a bolt-on, few customers would have the car tested on a chassis dyno after installation. More importantly, many NSXes have had the kit installed for 10-20 years, and have never had the NSX tested to ensure the fuel pump is still functioning properly. When the fuel pump

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The following photos have been submitted by customers. Drop us a photo of your NSX with the ScienceofSpeed Forged 2002 Style Wheels to be featured here!

Click for larger image.

Imola Orange Pearl | 17/17 | Washi Grey (Texas)

Formula Red | 17/17 | Washi Grey (Fujioka, Japan)

Berlina Black | 17/18 | BMW Silver (Ontario, Canada)

Monaco Pearl | 17/18 | Washi Grey (Colorado)

The following photos have been submitted by customers. Drop us a photo of your NSX with the ScienceofSpeed Forged 2002 Style Wheels to be featured here!

Click for larger image!

Imola Orange Pearl | 17/17 | Washi Grey (Texas)

ScienceofSpeed is excited to announce that the 2002-style wheels have begun shipping this week. Our first batch of wheels was delivered today, and all customers who were in the first ten orders to commit have been contacted. We expect to begin shipping the remaining orders in about 3 weeks.

This project has been a long term work in progress at ScienceofSpeed. The ability to offer a high quality forged wheel inspired by the iconic 2002-style NSX wheel has only been possible with the support from the NSX community and our partner, Titan 7. Titan 7's overseas factory is an OEM supplier with 10 ton forging presses, CNC mills, and automated paint line.

State-of-the-art computer-aided design and finite element analysis was employed to not only produce an attractive wheel - but also minimize weight (17.4-19.9 lbs), increase rigidity, offer big brake clearance (Stoptech, & others), while ensuring required dynamic load ratings for the NSX. Standardized quality assurance tests

02 NSX style lightweight die-forged wheels, JWL tested, with modern flush fitment and high-performance features.

The factory wheel offered on 2002-05 NSX are believed to be by many owners the most striking and fitting wheel for the NSX. They are popular to install even on earlier NSXes.