[home][rumors and news][model release matrix][tov motorsports][desktop calendar][exhaust notes][tov forums][links][search][sponsors][garage][login]

Tire Rack Upgrade Garage
 Search for a Dealer:
 Canadian Flag US Flag
 Honda Acura
There are currently no active Acura promotions
There are currently no active Honda promotions
Another lightly disguised TLX spotted on the streets of NYC
Spied on a California Freeway - 2025(?) Acura MDX Refresh
Integra Type S Pricing announced: $52k with pre-orders starting May 11
American Honda reports April sales results
FL5 Civic Type R (S Grade) sets new FWD lap record on the Nürburgring that's 1s slower than before.
Acura reveals more details on 2024 Integra Type S; goes on sale in June
Hondata officially releases FlashPro for 11th Generation FL5 Civic Type R
American Honda reports March and 1st quarter 2023 sales results
Today's Reading Links --> Re: A BEV tops global Q1 car sales for first time.
Join Discussion......
S2000 --> Re: Evasive Motorsports Honda S2000R First Drive: Type R-powered restomod
Join Discussion......
General Talk --> Re: Daniel ( the Nuclear Engineer)
Join Discussion......
General Talk --> Re: 2024 BMW 5 Series
Join Discussion......
Professional Motorsports --> Re: TOV-M - Palou Salvages First Half of May at Indy for Honda
Join Discussion......
Professional Motorsports --> Re: F1 - 2023 Monaco Grand Prix - Spoilers
Join Discussion......
Photoshops --> Re: Integra Type-S in a new hue
Join Discussion......
General Talk --> Re: What vehicle would you choose for this purpose?
Join Discussion......
Videos --> Re: Electric Cars Won't Change Anything, Here's Why
Join Discussion......
Today's Reading Links --> Re: Ford CEO says China main EV rival, not GM, Toyota
Join Discussion......
Today's Reading Links --> Re: Honda's FY 23 Update
Join Discussion......
Join Discussion......
Today's Reading Links --> Re: Tesla 3 and Y only depreciates 10% over 3 years. Thanks Elon
Join Discussion......
Today's Reading Links --> Re: Whistleblower Drops 100 Gigabytes Of Tesla Secrets To German News Site: Report
Join Discussion......
Today's Reading Links --> Re: Kia taking a more Honda like approach to its EVs
Join Discussion......
Jump to:
article details
Author Jeff Palmer
Categories NSX
Create Date March 17, 2016 16:23
Last Update October 30, 2017 23:01

New Sports eXperimental

As the first true Japanese supercar, the 1991 Acura NSX represented the pinnacle of Honda's road car technologies. Designed to suit the driver like no car before it, the NSX claimed a myriad of groundbreaking features. Based upon the principal of "Man maximum, machine minimum", the NSX wielded a formidable arsenal of technologies in order to achieve Honda's goals:

  • The NSX was the world's first all-aluminum mass-produced automobile. This minimized the body weight of the vehicle. Achieving a "supercar" power to weight ratio was critical to the project.
  • Along those lines, to balance the requirements of maximum power and minimum weight while simultaneously maintaining a linear response, a high revving, naturally-aspirated V6 was specified. This engine featured an all-aluminum construction with titanium connecting rods and a DOHC VTEC valvetrain. Maximum output was 270hp from only 3.0L of displacement, and it revved to over 8000rpm.
  • The NSX was mid-engined, in order to centralize the mass and minimize the yaw moment.
  • To provide a very low center of gravity, the V6 engine featured a 90-degree vee angle, which also kept the deck height as low as possible.
  • The NSX's cockpit was designed to serve the driver – modeled after a fighter jet cockpit, with very thin pillars and lots of glass to optimize visibility.
  • The NSX was designed to be docile enough to be suitable for everyday use, while maintaining the potency to challenge the world's greatest automobiles on a racetrack

New Sports eXperience
More than 20 years following the original NSX's introduction, Acura revealed the concept for the next generation NSX at the 2012 North American International Auto Show. The concept that was shown was stunning, but the few technical details that were revealed made it sound like a much different car from the original NSX:

  • The new NSX would be AWD
  • It would feature a V6 gasoline engine, with direct injection
  • It would be a hybrid, with 3 electric motors

To put it bluntly, none of these things really sounded very intriguing, especially in the hyper-performance atmosphere of the modern supercar. Our primary concern was weight and the ultimate toll it would take on performance. Being AWD and a hybrid, how on earth could they possibly keep this car light in weight? It turns out that the new NSX is not exactly a flyweight, but the good news is that it drives like a much lighter car. The hybrid thing had us quite worried as well, and not just because of the additional weight. The problem was that even the "sportiest" hybrids we had tried to that point were largely duds to drive, with more compromises than advantages. We just couldn't imagine saddling a so-called "supercar" with e-motors and a battery that would be potent enough to contribute. It turns out that Acura's not the only one who figured it out. Porsche, Ferrari, and McLaren all seem to have worked things out quite nicely in that respect as well.

Concept evolution
As the R&D team was quietly laboring away on this new project, we began to catch whiff of some interesting rumors concerning the powertrain. Even though the original concept indicated a normally aspirated transverse V6 configuration, we quickly began hearing that the design team decided that turbochargers would be necessary. And in order to properly package the new turbocharged engine, the entire package would have to be rotated 90 degrees, into a north-south (longitudinal) orientation. Acura ultimately confirmed these rumors in late 2013. Acura also began talking more about the new NSX's "zero delay response" and how it "immediately responds to the will of the driver"

This powertrain design change meant that the body had to be redesigned from the original concept. The original concept's elegant air intake openings aft of the doors became considerably larger, in order to feed a pair of huge intercoolers. To fit the 9-speed dual-clutch transmission behind the engine, the car had to be lengthened (+3.1"), while slightly stretching the wheelbase (+0.8"). The width (+1.0") of the car also increased in the process. Fortunately, the design team (headed up by Michele Christensen) managed to keep the car's gorgeous styling and even enhance the aggressiveness a bit.

JNC1 - 75 Degrees
As with the original NSX, the engineering team was aiming to keep the new NSX's center of gravity as low as possible. And again, the powertrain configuration was a crucial component in achieving that goal. Acura already had the J-series V6, a family of 60-degree V6s they could have tapped, but a 60-degree V6 would have been too tall and the center of mass would have been too high to meet the goals of this project. A 90-degree V6 (as in the original design) would have indeed offered a very low center of mass, but then packaging the duo of turbochargers on the outside of a 90-degree V-6 was suboptimal, as it would have required the NSX to be even wider. It turns out that an unusual 75-degree bank angle provided the optimum configuration for the project, and the fitment of a dry sump lubrication system allowed them to mount the engine an additional 2.4" lower within the chassis – in fact, the crank centerline of the engine is located below the plane of the axles. This engine is designated as JNC1, and it is pretty much a street legal racing engine. The block and heads are manufactured by Cosworth. The JNC1 features dual overhead cams with VTC (Variable Timing Control) on both cams. Interestingly, there is no valve lift control (VTEC) on the JNC1. The JNC1 also features a forged steel crank, forged steel connecting rods (manufactured by Pankl, of Austria), forged steel intake valves, forged steel (and sodium-filled) exhaust valves, cast aluminum pistons, and plasma transferred wire arc thermal spray lining the aluminum cylinder walls (this process saves over 7lbs of weight vs cast iron cylinder liners). The engine features a combination of direct injection as well as port fuel injection, and as mentioned, there is a pair of single scroll turbochargers (peak boost: 1.05bar, 15.23psi) featuring Inconel turbines and electric wastegates. The intake charge is cooled by a pair of sizeable (each one has an area of over 880cm2) air-to-air intercoolers. The intake manifold uses a two-into-one design with twin throttle bodies. It's done this way in order to minimize torque deviation between the two cylinder banks. Sandwiched between the engine and 9-speed dual clutch transmission is a direct drive electric motor, capable of contributing up to 47hp and 109lb-ft of torque.

The NSX features a lightweight dual path stainless steel exhaust system. The path of the exhaust is determined by mode of IDS (Integrated Dynamic System) that the driver has selected. In "Quiet" and during easy driving in "Sport" mode, diverter valves in the exhaust system route the exhaust gases through a pair of silencers on either side of the rear of the engine. These silencers are attached to the outer two pipes on the NSX's 4-pipe exhaust. If the driver has selected Sport+ or Track modes, the silencers are bypassed and the exhaust takes the shortest path, straight to the center two exhaust pipes at the rear of the NSX. Also, during high performance driving conditions in "Sport" mode, the system will selectively bypass the silencers. Similarly, there is a sound pipe attached to the intake manifold which permits the driver to hear the true intake sounds. This too is actuated by a valve in the intake system, and the various modes and volumes are controlled by the vehicle's IDS system. The difference in maximum SPL (sound pressure level) in the cabin when switching from "Quiet" mode to "Track" mode can be as high as 25dB.

Acura refers to the NSX's body as a "Multi Material Body/Frame". It is basically a spaceframe composed of ablation-cast aluminum nodes, with mostly aluminum frame members, and a smattering of ultra high strength steel pieces along the roof pillars. Body panels are a mixture of aluminum and SMC (sheet molding compound). The floor panel features a carbon fiber core. The resulting structure is extremely rigid - in fact it is two to three times more rigid in static and dynamic measures than its closest benchmark. This level of rigidity is considered crucial in the pursuit of delivering the NSX's "zero delay" responses.

Twin Motor Unit
In order to provide the NSX with its torque vectoring AWD capabilities, a TMU (Twin Motor Unit) drives the front axle. First seen on the rear axle of the RLX Sport Hybrid, this device is what gives the NSX its incredible yaw control abilities. As the name implies, it uses two motors mounted in a single housing with a planetary mechanism that allows the motors to decouple when necessary (at very high speeds) but they can also provide on-demand torque vectoring at any speed. The motors are rated at 36hp and 54lb-ft each, which sounds very similar to the motors in the RLX's TMU. The motors in the NSX have a higher maximum operating rpm (15000rpm) and the gear reduction ratio of 8.5:1 in the NSX's TMU is different from the RLX's TMU reduction ratio.

Continue to the next page to read our first street and track impressions

[Next Page]

reader's comments
Click Here to Submit Your Comments

Viewing Threshold (What is this?)

[fancy] [flat] [simple]
Subject Thread Originator Replies Last Post
  It's funny
shingles 15
  Turbo Sadness
garoto 6
99SI 0
  Fun to Drive?
Hondarulez 4
  Excellent review
Dren 9
  Cupholders made me LOL
FiSH-Chan 3
Potenza 2
  $100,000 non-hybrid NSX?
Fitdad 1
  The only review that matters
PoweredbyHondaX 0
Jump to:
First Drive: 2023 Acura Integra - Rebirth of an Icon?
Read Article....................
2023 Acura Integra PR Photo Gallery
Read Article....................
2022 Acura MDX Specs and Features
Read Article....................
2022 Honda Civic Design Story, a video by Honda
Read Article....................
Photo Gallery: 2021 Acura TLX Advance
Read Article....................
Photo Gallery: 2021 Acura TLX A-Spec
Read Article....................
Contact TOV | Submit Your Article | Submit Your Link | Advertise | TOV Shop | Events | Our Sponsors | TOV Archives
Copyright © 2023 Velocitech Inc. All information contained herein remains the property of Velocitech Inc.
The Temple of VTEC is not affiliated with American Honda Motor Co., Inc. TOV Policies and Guidelines - Credits - Privacy Policy