Hi All

Tried a search no luck.

I'd like to install a sequential shift light in a 987.2 Cayman R but not sure how to tap into the RPM signal. Any thoughts?

Thanks

Brian

 

Should be one in the OBD connector.

 

Here is the OBD wiring for a Boxster

 

Hi,

I have the same question. Trying to find out where the correct wire is to tap at the ECU to get the RPM signal for a shift light in a 987.2.

Did you ever find out?

OBD is not possible on the 987.2

 

I searched a ton of threads but could not find anything for the .2 cars. Peter Krause was nice enough to give me a detailed response in a facebook group, so I thought I'd add it to Rennlist for the next person who comes searching for the same answers:

 

Update: I installed my Cartek Club shift lights. Here is the wiring diagram for the DME:



The trick here is that the colors for pins 78-80 are used by TWO different wires in the B slot of the DME (the top slot). I attached the shift light to a white/red wire in the bundle going into the DME and nothing happened. Took a while to figure out that there was a second White/Red wire on the other side of the wire bundle.

Also, any of the ignition cylinder wires will work, including the ones going into pins 54-56.

 

Just if anyone start googling like me and finds no info on an rpm signal on a 981 Cayman:

I just fitted a shift light to my Cayman GT4 Clubsport (981), Ecliptech Shift P2.

You can use the same cable as mentioned above for RPM, 78, 79 of 80 on the big DME connector in the trunk. Colors are different on a GT4 CS: 78 GRN/BLK 79 GRN/WHT 80 GRN/GRY

 

Is RPM not accessible via the OBD on a Cayman 987.2?

 

No

 

You really don’t want to use the OBD2 for a critical signal like RPM as the update rate is so sllow.

 

Thanks for input

 

I used Cartech OBD version on my 987.2 and it works great

 

So when does the shift light come on? 7K rpm??? I'd like a light to alert me when I am at say 6.5K rpm Wondering if there is something that can attached to a plug wire that'd function as an rpm reader and then could have a light somewhere that'd come on to tell you to shift.

 

The Cartech unit is programmable - it has 3 colors green, blue and red I recall. I programmed mine to start at 4k - green , 5K- blue , 7K - red. On the track I try to always have the lights on (never drop below 4k) and shift at 7K.

 

Would recommend 4500 Green, 6500 blue, 7000 red.

Most folks try to game the lights. Just shift when the light comes on.