Canada CSX K20Z2 Automatic

[Rival12]

Hi there,

I know this is not available. However, The 2008 (FD2) R18 Civic uses the same Automatic Transmission, as the 2008 Acura CSX (FD2) K20Z2.

Transmission Code: SPCA

If the auto transmission code is supported under R18, and Engine is supported under K20. Is there a way to achieve a tuning solution? Albeit Boomslang with a 2nd ECU spliced in, or perhaps a possible direction to achieve A/F tuning.

It seems like all pieces exist here, would I need to use R18 ECU to achieve tuning? How about a K24 TSX ECU which also supports Automatic Transmission, along with tuning of the K20?

Is there a programming time associated with adding 37820-RRA-C12?

This ECU is available to other countries, and it seems like transmission and engine are supported in other platforms. If needed I could send spare CSX / RRA ECUs for testing purposes.

Could you please point me in the right direction even if you don't have a direct solution. Thank you.

[Spunkster]

I'm sorry, but there is no way to do this and there are no plans to support this.

[JustinH]

Hello

I would like to share my story and information in hopes that others can find it useful.

I have a 2008 Acura CSX with the k20z2 in it and 5 speed manual transmission.
I purchased an ecu from a z3 and had it programmed to my ignition/ key.
I was able to drive and operate the car normally while I saved up for Flashpro.

The flashpro works as it should and I started off using the completely stock tuned calibration, only adjusting the injector size and times to match my specs in the z2/a3 until I am able to get an rbc with injectors and the transmission gear ratio to match the 5 speed transmission. I also switched from MAF calibration to MAP, making sure to determine WOT, disable p0101 etc...

The goal one day is to have a z3, but for now I'm doing what I can with the z2.

I have cat delete, stock header and exhaust
Stock intake with throttle body spacer
Z3 throttle body
H22 egr block off plate (k20z2 has egr)
Throttle body coolant delete (my throttle plate has not frozen at intake temps of 25f in -25 weather here in Canada.)
8th gen si flywheel, competition clutch kit
Hybrid racing detent springs and selector springs
Acuity shift cable bushings
Acuity shift base bushings

Today I discovered the fd2 Asia Civic 155hp calibration, which is also a k20z2.

Now that it's out there, that this can in fact be done to a k20z2, although I was told it could not. The question I have is, should I use the stock tuned - base map for the z3 like I did in the beginning and continue to data log and road tune my fuel tables based off of that? Or should I import cam angles, ignition tables and fuel tables from the Asia Civic calibration?

To get in to a bit further detail, if the answer is yes, should I also bother importing the other parameters like coolant temp compensation, lambda values, cranking fuel etc or is it okay to just import the cam, ignition and fuel tables?

The reason I do not want to use the Civic Asia calibration is that there aren't as many options/ parameters as there are with the canada/ us civics like adjustable launch control and a few other things I've noticed.

Thank you in advance for your time and advice

[JustinH]

I'm sorry, but there is no way to do this and there are no plans to support this.

I apologize for "highjacking" the post, I could not figure out how to make my own. Any advice would be greatly appreciated. I understand my situation is not common. I'm only road tuning and not expecting significant changes, I would just like to continue to learn and build experience. I have only been focusing on fuel tables and I'm okay with that for now, I just want to know if I should continue what I was doing with the 8th gen si calibration, or if I should import values from the 155hp calibration and if so, do I need to import everything or can I just worry about Cam and Ignition tables?

[Spunkster]

Those calibration are no longer supported, and we do not recommend trying to use it with those vehicles.

[JustinH]

Okay thank you for your reply

Instead of using that 155hp one. Do you suggest I continue my project using the completely stock, tuned, maf calibration for the 8th gen si, converting it to map and just focus on fuel tables? I wasn't sure if importing ignition and cam angles would be beneficial to me since I only have a 30° vtc. I have never seen it go over 27° even though the command is 45°. Things have been running smooth and my trim% is +/- about 10% most times.

I am just learning and know I'm limited due to street tuning and having an engine that technically isn't supported. Any advice in a direction that could be educational and helpful to me would be really appreciated.

I'm open to trying things and reporting back, I'm not looking for perfection, just some helpful tips or tricks for someone new to tuning.

[soloth]

How about exploring an R18 ECU setup or using a Boomslang harness with a secondary ECU?
build now gg

[JustinH]

The calibrations for the r18 seem very different from the k20s.

Since my last post I have added a couple things to the build, like the 310cc injectors and RBC manifold as well as a j35 throttle body. I have discovered for my particular set up the best results so far are that I adjust all cam angles to compensate for my 25° vtc and have the vtc gear "spool" like the hondata help page suggests.

I know there are many differences between the z2 and z3 but I have been getting 0 knocks, cels or anything of the sort so far. I'm just gonna learn on this engine and save for a k20z3 or k24a2 ☺️

Thank you for your ideas though!

[KingLuffytaro2]

Anyone here has the c101 pinout diagram for the auto transmission csx?