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RPM input for DL1
Posted: Fri Apr 04, 2008 9:39 am
by Adrian Williams
I've been using a DL1 for a couple of seasons on a Caterham. The rpm input was taken from the tacho feed from MEMS ecu and has resulted in a constant reading of 500rpm with occasional spikes.
I've changed cars so I'm now fitting the DL1 to my new car which is also a Caterham and would like to get the correct rpm reading this time around. The car has a stack dash and aces shift lights already fitted, presumably if I use the same feed for both of these which runs of the MBE ecu I'll get the same problem as before?
Adrian Williams
Posted: Fri Apr 04, 2008 8:09 pm
by CharlesElliott
Adrian,
I run my DL1 and Aces shift lights from the Stack tacho feed (my car doesn't have a Stack and so its spare), and the standard taco feed remains untouched.
Unless there are impedence issues, it should work if you tap off the stack feed.
I assume you are connecting to rL on the DL1.
Charles
Posted: Sat Apr 05, 2008 1:51 pm
by Adrian Williams
Thanks Charles
I'm connecting it to the rpm (5v) input on the DL1. The feed to the aces is a white wire with a black trace, is that the same as yours?
Posted: Sat Apr 05, 2008 6:04 pm
by Support
I don't know if it helps any more, but I recently re-wrote most the help on the RPM input as it comes up lots in my support work!!
http://www.race-technology.com/wiki/ind ... RPMSensors
Kind regards,
Andy (RT support)
Posted: Sat Apr 05, 2008 6:20 pm
by CharlesElliott
Yes, black with white trace. I actually think that the Stack feed and std Caterham Tacho feed are just two wires from the same ECU pin.
A few people I race with had problems tapping the std tacho feed for the DL1, hence why I used the Stack pin.
I guess that impedance issues are quite marginal so I think you'll need to try it.
Posted: Sat Apr 05, 2008 7:56 pm
by Adrian Williams
Thanks again Charles and Andy
I'll give it a go on the white and black feed and see what results I get.
Posted: Tue Apr 08, 2008 9:09 pm
by Adrian Williams
It worked.
Thanks again guys.