- 1 September 2015
- Stockholm, Sweden
Get your kit at:
To make it easier for everyone, all orders will be handled there from now on. This thread will be kept for continuous information updates and discussions concerning our S2000 cluster conversion kits.
It is with sincere joy I’m finally able to release a complete Plug & Play S2000 instrument cluster conversion kit for the NSX, the NSX2S2K Kit! The kit has been specifically developed for the NSX from the bottoms up with a purely bespoke design and selected components and is exclusively released on this excellent forum. No modifications or splicing of the NSX original wire harness required! No “pigtails” from the S2K donor car required! No “converters” required! Everything is included except for the S2K instrument cluster which must be sourced by the customer.
The kit is currently available for 91-94 year NSX models and is compatible with both 00-03 AP1 and 04-05 AP2 S2K clusters. The basic kit shown for the AP2 version:
The kit with an S2K cluster:
Each kit is hand built by myself, everything from soldering electronic components, programming of the controllers, 3D-printing of the encasings, splicing, crimping and assembly of the harness to quality control testing under a strict quality assurance protocol. Some key features:
- Automotive grade components in compliance with the strict AEC - Q101 or AEC - Q200 protocols to provide the top quality and endurance required by automotive applications
- Reverse-voltage protected by design to guard against load dump conditions and reversed battery polarity
- Made in USA - printed circuit boards (PCB’s) for reliability and consistency in quality
- OEM connectors from Japan for a 100 % compatibility with your car and a Plug & Play solution
- 3D-printed encasings specifically designed for the cluster housing environment in the NSX
- Custom made wire harness using OEM connectors and crimps, the latter crimped using very expensive OEM crimping equipment. Includes “breakouts” of wires for optional voltage and oil pressure meters, everything is labeled
- Simple speedometer calibration using supplied digital calibration device for precise speedometer readings. The calibration can be redone as many times as you wish. For instance you can find specific calibration factors for different set of wheels and gear ratios to keep your speedometer reading exact regardless of setup
- World’s first fuel meter auto calibration feature, AutoFuel*, which is specifically developed for the unique design of the NSX fuel tank for an exact reading. Only available as an option for the 04-05 AP2 version. Manual calibration feature available for all applications
- Optional trim plate** water jet cut for perfect fitting. Available in three different versions: 100 % prepreg 2x2 twill carbon fiber, powder coated matte black aluminium and unpainted aluminium. All with 3D-printed installation accessories for a perfect, seamless installation.
- Optional odometer reprogramming service*** to exactly match the mileage of your NSX
- Full functionality of all lights and meters (Rev. XP10/XP9 and onwards)
- Each kit is individually tested with your/our S2K instrument cluster to ensure 100 % functionality and quality upon dispatch, all results are documented
- Delivers in a professional, foam filled case to ensure a safe transportation to your destination
** Requires simple modification of the original gauge assembly surround and the S2K instrument cluster housing – available as a service but requires you to send your items to me
***Requires sending your S2K cluster to me for reprogramming
The prepreg carbon fiber trim plate:
The powder coated aluminium trim plate:
The unpainted aluminium trim plate:
Sjoeberg Design&Prototyping, it's owners and employees shall not be held liable for calibration errors or other misuse of this product that might result in damage to the user or others, i.e. unvoluntary speeding due to the aforementioned miscalibration. The user assumes all responsibility to ensure an adequate calibration and proper use of this product. The user assumes all responsibility regarding possible infringement of laws regulating odomoter alteration in his or her country and to supply Sjoeberg Design&Prototyping with valid documentation that supports the claimed original odometer reading.
The S2000 instrument cluster:
There are several editions available of the S2000 instrument cluster. My kit supports the following
- All USDM and JDM/EDM 2001-2003 AP1
- All USDM (8000 rpm redline) and JDM/EDM (9000 rpm redline) 2004-2005 AP2
And a USDM AP2:
Why swap to a S2000 instrument cluster in the NSX? The S2K cluster is a popular mod for a couple of reasons. Firstly, it's Honda OEM and therefore of high quality. It's all digital design represents an attractive retro-futuristic look and it sports a high density of instrumentation. The latter means that it is small in size, lightweight and consists of no moving parts that can break. A high density of instrumentation is especially advantageous for sport car applications, as the driver will find all information conveniently situated in a small area in the instrument panel, thereby can spend less time finding relevant information during spirited driving. Turns out the S2K cluster is a perfect design for NSX's with smaller diameter steering wheels, such as the popular 330 mm diameter ones. No instrumentation gets clouded by the steering wheel, forcing the driver to move his or her head to see the instrumentation at interest. I'ts also less than half the weight of the heavy original NSX gauge assembly.
Mapping of the S2K ECT and fuel readings to the NSX below:
Want to customize the look of your S2000 instrument cluster? Check out http://www.qube-engineering.com/ for some cool LED conversions.
Note: Images are reproduced from Qube Engineering.
Got a scratchy cluster face plate on your used S2K cluster? No worries! Shiny new ones are available directly from Honda for about $50! Make your cluster look like completely new.
AP1 Discontinued! (Part number: 78170-S2A-E02):
AP2 (Part number: 78170-S2A-A01):
Removal of the original gauge assembly:
<iframe width="640" height="360" src="https://www.youtube.com/embed/3EFyjhdy73Q" frameborder="0" allowfullscreen=""></iframe>
NSX2S2K Installation Part 1 - electronics, calibration and testing:
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NSX2S2K Installation Part 2 - Modification of NSX gauge assembly visor + Trim plate
<iframe width="640" height="360" src="https://www.youtube.com/embed/Q52diZ0VNKU" frameborder="0" allowfullscreen=""></iframe>
NSX2S2K Installation Part 3 - Modification of S2K cluster housing
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Detailed calibration procedures
You will need a reference speedometer, like a smartphone with a GPS. Remember that the calibration will only be as accurate as your reference meter so the ideal case would be a calibrated rolling road device or similar, however I consider that to be overkill for this purpose. If you are doing the speedo calibration using a cell phone or any other GPS unit, have a friend in the car that can help you out with taking notes. That way you can focus on your driving and keeping the car at a constant speed. Try to take the readings at "higher" speeds, it will be more accurate. Small errors may not be detected when going "slow".
The factory setting (3900) should give an accuracy within about 20%. To calculate a new setting based on your readings, use this formula:
Example: say you have a "true" speed as indicated by your GPS unit of 50 mph, but your speedometer is saying 55 mph and your current calibration factor is 3900. Divide 50 by 55 and multiply the result with 3900. The new calibration factor would then be 3545. Go out for a test run to confirm, redo if not within acceptable accuracy. The allowed range of settings is 3000-9999.
Manual fuel calibration (Model 14a only)
For the manual fuel calibration, compare your reading in the S2K instrument cluster with the one in your original one. Procedure: Turn ignition on and note the fuel reading. Turn ignition off and turn the calibration knob clockwise if you need to increase your reading, and counter-clockwise to reduce your reading. (Important to turn the ignition off, the result of your adjustment won't be immediately shown if the instrument cluster is powered, the fuel meter is purposefully very slow as you don't want it to bounce around when your fuel is splashing around in your fuel tank). Turn the ignition on again. The fuel meter adjusts it's reading immediately. Repeat until you have a satisfactory result. Note: Make only small adjustments first so not to overshoot the target, it can be very sensitive. And also don't do the calibration with a completely empty or completely full tank. You might risk under- and overshooting the target without knowing it. I would say somewhere between 1/4 and 3/4 of a tank would be optimal.
The extra breakout wires
"Permanent +12V", red
This wire is an optional power supply wire for the S2000 instrument cluster. It should be connected to a 12 volt source, but it must be a fused one. This is to feed the instrument cluster with power when your car is turned off, so to keep the clock working together with the KMH/MPH setting, and the dimming setting. Note that this is not required for the cluster to work. If this wire is not connected, the clock will reset itself between each power cycle and default it's KMH/MPH setting and it's dimming setting.
One simple alternative is to make a T-connection to the white/yellow (WHT/YEL) wire that goes to the NSX clock in your dashboard. From page 23-224 in the 1991 NSX Service Manual:
Note that the color coding for your vehicle year might be different. Simple to measure though, should be 12 volt when the car is turned off with key out. NEVER EVER connect any wires directly to the battery without a fuse. Cars have burned down for less. Safety is important.
This wire can be connected to an external tachometer or shift indicator. It carries the RPM signal of the engine.
"Oil pressure", green
The oil pressure signal wire can be connected to an oil pressure meter to provide the signal from the oil pressure sensor in the NSX.
"+12V", red and "Ground", black
The ground and 12 volt wires as meant to power an external meters, such as voltage meters, oil pressure meters and tachometers. Meant only for low-current applications, not like audio head units or similar which are high-current applications.
How to tell the difference between a 2006+ AP2 unit and a 2004-2005 AP2 unit
The 2006+ AP2 units are not (yet) supported by this kit, but it can be difficult to tell these unit apart from the 2004-2005 units which are supported. Always confirm with the seller of your instrument cluster that it is from a car in that exact range, but also check the lower left panel containing some lights. It should look like this:
2004-2005 AP2:And not like this:
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