Starting to track things that are not fixed on my Z32 TT, and I have a first question after my presentation in the newbies section:

 

The Emerald ECU has been mapped and gives 501 Bhp according to the test report: Fine.

The Racelogic traction control has been disconnected for this mapping, and I wonder if this was just for performance measurements without the interference of the racelogic, or if there is some non compatible reason for this disconnection?

I suppose that the racelogic system on a Z32 is connected on the ABS sensors to detect rotation speed differences from each wheel?

To have a power adjustment, the racelogic system is also connected to the injectors, so that it "cuts" the fuel delivery according to the detection.

Anyone knows if there is a difference between Emerald drive of injectors and other ECU drives?

I know that the emerald ECU is driving the injectors by actuating them with permanent live on them, and opening signals through a mass contact.

Emerald is also using independant wheel sensors for detection: Is this due to non compatibility with ABS sensors?

 

Thanks for information if anyone has experienced the same issue!

Racelogic traction control (RLTC) uses ABS sensors from all four wheels. The RLTC intercepts each injector signal and

controls them individually to achieve traction control. I can't comment on the Emerald ECU setup but the OEM ECU

controls the injectors with common permanent +12v to the injectors and switching to earth (0v) for each injector.

 

Here is the generic install guide from Racelogic themselves:

 

http://www.racelogic.co.uk/images/stories/other-prod/Traction%20Control%20Manual%20v3_2.pdf

 

and for the Z32:

 

http://www.twinturbo.net/nissan/300zx/tech/tc/tc.html

 

-Andrew

Hi Hubert, as far as im aware there is no issue with running the Racelogic with the Emerald. That was the plan we had. But during tuning, we had issues initially with the car missing at around 2000rpm. It was a long day and John decided to disconnect the Racelogic, just incase it was the traction control kicking in on the rollers. But later we found it was a CAS issue. Thats when John had the new CAS discs made up. Hopefully John might see the thread and shed a little light on this, as he knows the 300zx inside out when it comes to tuning and the Emerald system.

 

Barry

Andrew, thanks for the technical information! Emerald Ecu is working the same way as the OEM ECU, so the ABS sensors can be used by the Racelogic system with the "intercept" of the injectors signals.

I just wanted to insure that there was no incompatibility there. The existing wiring sould be OK!

Barry, thanks for the information too. The re-connection should then be quite easy, without any influence on the other parameters.

I will look at the wiring installed, and raise further questions if any.