Wanted Nissan CA18det Cal file please

[Komdotkom]

Hi, I've finished wiring up my CA18det with an SM2, and was wondering if anyone could provide a basic map so that I can iron out any small issues before heading off to the dyno.
The engine is stock except for a gt2860 and some 850cc injectors, runs the Autronic trigger disc in the CAS.
Thanks in advance.

[Ian]

What is the firmware version in the SM2?

[Komdotkom]

Hi Ian, the SM2 is a V1.99 Autotune.

[GreenMeenie]

this is a longshot, but i Also need a cal file for my ca18det. but i have Autronic SMC ecu. could you guys help me?

Best regards Linus

[sarde]

I don't have a firmware on hand to send to you but in cases as such you normally need to provide some basic information concerning your setup. Please use the following questions as a guide

What chip version is your SMc using?

What CAS DISC are you using? Do you understand how the Autronic interprets cylinder pulse and cylinder reference signals? If not, do you have access to an oscilloscope?

Do you have a dwell board fitted to your SMC? If not, can you provide any details about your ignition solution?

What injectors are you using? Make, model and flow rating with base fuel pressure will help.

Are you using an OEM boost solenoid, or are you using an aftermarket solenoid valve?

What have you used the low side outputs of injector 5, 6, 7 & 8 to do within your wiring solution?

Do you have any specifics you will like the SMC to manage?

If you have any questions please feel free to make follow up posts and I will try to assist as best as I can.

Thanks for choosing the Autronic brand, cheers!

[GreenMeenie]

Hi, and thx for the info,

i dont know the chip, but its 1.99 software version

I'm using the orginal CAS on the ca18det

no dwell board, i'm using the orginal coils at the moment but also have VAG coils to test.

Im using 444cc GTR injectors, don't know very much about them though.

i have a aftermarket solenoid valve (Greddy proffec 2)

they are not used at all for the moment.

sorry for the multiple post, cheers!

//Linus

[sarde]

Linus,

Great to hear from you, and I hope that all is well. I'm really sorry I don't have a cal file for you to use directly, but instead I can give you as much assistance you need to understand how to use the Autronic ECU as well as complete a thorough installation.

With the Autronic ECUs the firmware is located on a removable chip, so in light of this, you can add functionality or revise the existing functionality to an ECU by upgrading the chip. So to say that you have a SMC v1.99 means that the ECU is a SMC and the chip version (firmware is 1.99). You are using a v1.99 SMC correct?

Assuming that the CA18DET Nissan engine uses the standard 360 optical CAS DISC common on most Nissan engines, the SMC won't be able to use the cylinder pulse nor the cylinder reference produced by the CAS DISC. This is the case for two reason, the cylinder pulse signals have too many events and the immediate cylinder pulse event which will follow the cylinder reference signal (positioned at TDC of No 1 cylinder)falls within a crank angle degree that is outside the allowable scope of the SMC v1.99 firmware. The second scenario describes the cylinder lead angle. In this case you can use an Autronic CAS DISC or you can also choose to either the SM3 or SM4 Autronic ECU.

With respect to your ignition solution, you have to remember that the Autronic SMC as well as the SM2 can only output an ignition pulse if a dwell board isn't fitted. This means that you won't be able to drive coils directly. Most SMC/SM2 installations use a CDI ignition solution where the ignition pulse is sent from the SMC/SM2, fed to a CDI box (MSD DIS-4/M&W Pro14/Autronic 500R) and the output channels of the CDI box will then send the spark energy from a collapsed capacitor to the coils. The other scenario for a SMC/SM2 ignition solution would be to fit a dwell board to the ECU so that the ignition pulse will now have dwell instructions which can now be sent to an ignitor and then on to the coils. When setting up your ignition solution you have to be aware of the spark energy needed, whether you intend to use an IDI or CDI strategy and the coils which will be needed based on both of the previous details. At times it may be easier to map things out on paper with accompanying diagrams to help.

The injectors you mentioned should be listed as JECS I believe, however, I believe some of the other senior members who are well versed with the Nissan platform can confirm this for you. A few details to note when it comes to injectors aside from the obvious differential pressure and injector flow ratings would be injector drivers fitted to the ECU and the type (saturated or peak and hold) of injectors being used. You can measure the resistance across the injector pins to determine the type of injector and the top cover case of the ECU should have a serial number printed on it which will verify the type of injector drivers fitted to the ECU.

I'm pretty sure that the boost solenoid valve you mentioned will be able to work. What you have to remember is that you will be using the single auxiliary output available on the SMC to operate the boost solenoid valve. This means that within Relay/Analog OP under M1, you will have to set options 6 which is boost to Aux output. The boost control features are located under M6.

I've responded to the noted listings you made in your post, however, I have done so with an assumption that you have a working knowledge of a stand alone ECU installation. If you need for me to elaborate please feel free to do so. If you need me to lend assistance in specific areas only, I can also do this as well. Once again, I'm sorry I don't have a working file to distribute but as I stated, I can assist you in a different manner and that's by understanding how to configure a cal file to enable a functional ECU installation.

Looking forward to your progress, cheers!

[GreenMeenie]

Hello Damien, thx for all the help. I am a beginner at this kind of stuff so my knowledge is pretty basic.

as for the CAS Issue, i get the injectors to "click" and get a 100mV signal from the ignition output. is it suppose to be such a low signal? and is that why i need the cdi box/msd?

The previous owner of the Ecu used a Nissan CAS same as mine and it worked, thats why im a bit confused, once again im sorry for all the stupid questions but i really want to learn this stuff

//Linus

[sleeper]

to get it to work, you need one of these.

http://www.mrm-racing.se/shop/index....uct&id_lang=5#

And you need either a smart ignition module (minimum 2 of them to run 4 coils in wasted spark, or 4 of them as single spark ( single spark is not a good option with ignition modules due to excessive dwell at low rpm ))
Or you will need a cdi box and run coils without any ignition module built in ( stock sr20 will work! AUDI will NOT work!)

Reason to this is that the smc can not control dwell time.

[sarde]

Linus,

Good day to you. I'm sorry but there's no such thing as a stupid question when your objective is to learn and advance your current level of understanding. I my opinion, the MRM-Racing forum is an excellent place to explore the mechanics of electronic engine management solutions, strategies and systems. Much of this is done using the Autronic brand, however, much of what is understood can be applied to any brand.

With respect to your response on the CAS disc, you have to remember that an incorrect CAS disc doesn't mean that the ECU will not respond. It just means that the ECU won't respond as you would have hoped. It's not outside of the ordinary to get a response such as injectors clicking and signals submitted from the ignition channels. if you were to proceed with the incorrect CAS disc you can expect to see inaccurate engine speed calculations, incorrect injector/ignition events relative to crank angle degrees of rotation and this will eventually lead to the engine being unable to increase in speed (so in effect rev freely).

Initially, reading the SMC manual was a huge help to me. The manual isn't super easy to read and it assumes that you have a working knowledge of engine operations, electronics and engine management. The great thing is that you have three portals for support to consult when things aren't clear. Your primary support should be your nearest dealer, if this isn't ideal then you should contact the main office in Australia. You may also feel free to post here on the forum where you should get a timely response. I hope this helps you move along in a progressive manner.

The ignition output signals coming from the SMC won't have anything near what would be needed for the ultimate spark energy needed by the engine for optimal operation. A SMC which doesn't have a dwell board fitted will only submit an ignition pulse, this entails the ignition event relative to crank angle degrees. This pulse can either be sent to a CDI box or it can be sent to an ignitor. When selecting an ignition solution you should take the time to understand the difference between an inductive discharge and a capacitive discharge system as this will enable the great success of consistent, trouble free engine operation.

I can't explain why the previous owner's setup worked as it did without a detailed break down of how his solution was executed, but the focus should be on how to get your setup fully operational. Having said this, I can take the time to offer you the support needed. Of course, I don't have all of the answers, but I will try my best to give productive responses and constructive instructions.

Sleeper has give you the link to see what the correct CAS disc looks like and where you can get it. You may also buy this from the Aubert Electronics office in Australia. Sleeper's details on the proposed ignition solution are also correct. If you need further assistance understanding ignition devices as well as the various stages of the ignition system so both primary and secondary.

Cheers Linus!

[GreenMeenie]

thank you both for the help, now I have an idea how to continue the installation!

I will post here again if there is some other questions, and thx again for the help guys!

//Linus

[sarde]

No worries Linus, you're more than welcome anytime.

Have a great weekend, cheers!

[GreenMeenie]

do you guys know what kind of air temp sensor i need?

would this work, or do i need a specific model?
http://www.ebay.com/itm/AEM-AIR-INLE...3D171475284177

[sarde]

I'm sorry Linus but the Autronic ECU need a very specific air temperature sensor, especially the SMC ECUs if using anything lower than the v1.99 or v2.00_b firmware. The SM4 and SM3 can use some (not sure which one in particular) NTC sensors but the SMC/SM2 are very specific concerning the AIT needed.

Here's a link for the exact sensor you would need

http://www.mrm-racing.se/shop/index....duct&id_lang=1#

Because the Autronic ECU utilizes a speed density fuel model, the item in question is very critical. So although you may get away with seemingly functional setups using other sensors, the fuel model won't do exactly what it should do and I can tell you that one of the very special things to note about the Autronic ECU is the fuel model.

Hope this helps you Linus, cheers!

[GreenMeenie]

thank you Damien! this would have taken so much more time without your help!

//Linus