SR20DET CAS connection, other questions

[jano86]

I am installing the EMU in my SR20DET powered drift car. I have a few questions:

1. CAS connection
I found some settings for the Nissan CAS but I would like to confirm if I the connection I figured out is correct?



The connector itself:







The settings from Jadzwin:




2. EGT connection
My EGT probes do no have any labels. Only blue and white wire and hence I have no idea which one is NiCr and NiAl. Is there any way to check it or doesn't it matter at all?

3. Idle air control
In SR20DET there are two stepper motors for the idle control. Do I have to use both or one will be enough? Can You have a look and give me a hint how to wire them to EMU?

[Karel]

From me:

why you dont use normal 1342 oder and you set offset 2134 ? never mind iftimeng set correctly.... just question

And i used only one Idle air controler on my SR20DET, but in most cases i dont use idle air valve at all, or dont use it for idle control.
Why ? And how i control idle ?

I open the throttle little bit more, so the engine runs cca 2000-2500RPM at normal ignition angle, and retard it to 0-5° . This will keep your engine run at cca 1000RPM (what is good for race car).
No i set idle control by IGN timimng so i am able to control idle between 1000-2500RPM just using ignition timing.

I also set the idle cotrol so, that there is no way that the engine can run less than 1000RPM so for example if the engine runs 1000RPM at 5° , i set the idle cotrol to 0-15 added to base map. EMU can rise idle, but the engine will always be at minimum 1000RPM for sure.

If you use idel valve, and need for example 50% duty to make it run at 900RPM, the engine will die at 20% DUTy ..... and if somehow the emu reaction will be little longer, the engine will stall. And if you valve is broken, engine will not start or run without touching pedal. ........



so just ideas from me

PS: for sure it has some drawback, like fuel economy, or engine running hot on idle.....

[jano86]

Thank for the input Karel. I'm not going to be tuning the EMU by myself so just want to make sure once it gets to my tuner it is connected correctly. I'm thinking about connecting one stepper motor and leave the decision upon the guy mapping it how he will control idle. I assume it can be switched off even when connected.

Concerning the firing order it's a screenshot from Jadzwin I found somewhere on this forum, just a repost, so maybe he will tell us more about it.

[clem]

Hi, welcome to the forum. Firstly, there are no stepper motors on the SR

here is my wiring configuration, its in german, but I´m sure you will get it...

Trigger Settings in emu like in your first post.

May someone is helped by my configuration.
S14 SR20DET, NVCS not activated yet. Fuel mapping is almost finished until 0,4 bar of boost.
Main modifications: GTX2863R, custom exhaust manifold, 3" turboback with oem CAT, tomei 260° Procam Intake, 60mm Throttle body, Fmic, 740cc Nismo Injectors.
Attention! I run a Bosch double fire coil in wasted spark configuration.

[Karel]

I looked one more time in the service manual and the

IACV-AAC valve ist used for idle control by factory

and

IACV-FICD is used to compensate more torque demand when the climatic compressor is activated.

So basicly, the IACV-AAC looks to be one that need to be pulsed with some DUTY (like 10-90%) and the IACV-FICD can be switched for long time (so basicly 100%) but you can expect lazy movement of this valve.