Nissan Skyline Crank Angle Sensors : CAS

There are three different CAS, two are functionally identical but look different. The early cars R32 89-93 ish got Mitsubishi sensors. Then for some wild amount of time in there, they got Hitachi sensors for the 93/94 and early 1995 cars. Then it was back to Mitsubishi. I don’t really care enough to be exact, as the function seems to be the same.  The R34 CAS has a plastic cover and is both driven, and signals come out on different pins. 

CAS gasket – IMPORTANT to space the CAS correctly. 13525-58S00

R32/R33

23731-02U11

 – Mitsubishi

23731-08U00 – Hitachi 

R32 GT-R with timing anti tamper tape applied

R34 cam angle sensor

23731-5L300

Notice the drive on the R34 CAS on the left, and the R32/R33 on the left

R34 GT-R ECU pinout or wiring diagram for computer

Other options:

Other options involve not getting the crank position from the cam gear.  The problem with getting the reading at the cam is that the belt stretches and flexes a little bit.  Add in the wheel inside the CAS fluttering a little, and having 360 little, teeny, tiny slots, you can get some crank/ignition timing errors.  If you have a stock car, at stock power, the OEM CAS works fine. If you are making 1000 hp, turning 10,000 rpm, then you need to go to a crank pickup.

With a crank pickup, you also need what is called a 1 signal. Since the crankshaft spins around 720 degrees, or two turns in every complete combustion cycle, the ECU needs to know when it is at top dead center (TDC) on #1 cylinder during the compression stroke, to fire the spark plug.

In recent years, lots of companies have come up with kits to read the crank position.  Here are a few.

Nissan RB (Twin Cam) Crank/ Cam Trigger Kit from Ross Performance

• Nissan RB Harmonic Damper with 12 or 36-2 Tooth Integrated Trigger Disc
• Nissan RB Crank Angle Sensor Mount (306000-75) OR Nissan RB Crank Angle Sensor Mount to Suit Girdle (306000-75-SP1) SP1 mounting spigots are 10mm shorter than standard.
• Nissan RB Cam Angle Sensor Mount (306000-74)
• Nissan RB Twin Cam Trigger (306000-73)
• Honeywell GT101 Hall Effect Sensors (992GT101) OR Cherry Hall Effect Sensors (992CHERRY)

Platnium Racing Products Trigger kit

Platinum Racing Products have a number of RB trigger kits available.  Here is one option, pictured above.

• Engineered timing gear with incorporated trigger disc.
• Gear works with any known balancer.
• Custom colours available upon request.
• Bolt kit included.
• Lifetime warranty on all Platinum Racing Products hardware.

For the full list of options, check out the PRP site.   

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