No idea where to post this and get good visibility…

I’m pretty much a noob when it comes to electrical connections. Maybe someone can help me.

I have a data logger that I use on the race track (Race Tech DL1). I want to hook it up to the ECU signals for engine RPM, Gas pedal position and such. I’d eventually like to expend the connections to make use of the other nice sensors we have (steering angle, wheel speeds, brake pressure to name a few).

My question is, is there a clean way to do this? Other than soldering a parallel wire to the harness? Quick connects are a big no-no but maybe something else exist that I don’t know about?

Any advice would help.

 

Does it have a OBD connector?


http://www.obdii.com/links.html

 

I can be connected to the OBD2 jack, but it has no software to make any sense of it yet.

I thought OBD sampling rate was to slow for good data logging?

 

good luck getting RPM.... unless your data logger can convert CAN signals.. your best bet is to attach it to ignition coil #1, and have your data logger multiple the signal to get the overall engine RPM... gas pedal position, do you mean throttle body position?

i think it's best if u get the field service manual and look up the wiring diagram. it will tell u which ecu wire to tap into.. just.. becareful and not cut the wrong wire...

 

I was thinking of grabing the signal from terminal 62 from the ECU for engine RPM. That's for a 2004 Z. I left my 2005 manual at home, I'll use that one to be certain it's the same terminal.

As for the throttle, I'm still debating if I should use the signal from the pedal or one of the 2 sensors on the throttle body. The ideal would be to get both pedal and throttle. It would be interresting to see the interraction of the ECU in the throttle control.

For the connections, I think I'll make an intermediate harness to place between the car's harness and the ECU. It will be cleaner and I'll be able to take everything off when I sell the car.

 

Well it's been almost 2 years now and it's time to get more data!

I know where to get the signal for throttle position, brake switch and I'll get the #1 cylinder ignition signal for RPM. Still looking for a cheap steering angle sensor.

I know others are logging these data and that some other are planning to. So let's share our findings!

 

Take a look at these.

http://www.uprev.com/products/cipher_NI.html

http://obddiagnostics.com/

There is a lot of free software out there. Just search

Cm

 

That would be an other option that would require more post processing of the data before it can be merged in my analysis software. Something I'm trying to avoid. It's hard enough to sync with video as it is!

Thanks.

 

You must be big into the SCCA or Autocross? I am sure there are tools. I just a matter of digging around from them.

Cm

 

Nah, I only do DE.

here's the datalogger I use:

DL1 from Race Technoligies.


http://www.race-technology.com/dl1_2_27.html

It has plenty of inputs for many sensors.

 

You can always get the autosport harness to avoid splicing the factory wires.

It's expensive though...

And I agree with cheston, for RPM you should be looking at crank angle sensor or ignition


Or screw it, just get Cipher... it really has great datalogging capabilities IMO. Definitely not too slow...