KA24E: Tuning Basics: KA24E

[stinky_180]

Tuning the stock KA24E ECU

Hello everybody! So it looks like neo finally added an ECU tuning section for us hackers to discuss. Well here I will give everybody as much information regarding the KA24E ecu and tuning. For starters, the KA24E ecu is an 8-bit ecu whereas the KA24DE ecu is 16-bit. No, its not like comparing regular Nintendo with Sega Genesis! Well, kinda, NES kicked ass compared to Sega... Because the ECU is 8-bit, all you need to do is add a socket to the ecu and thats that. For the KA24DE, you need to install a daughterboard which has two sockets and you will need to burn two chips (or run two emulators). With that said, it is cheaper and easier to tune the ka24e than the ka24de.

Why do you need to socket the ECU?
The ecu reads its 'tune' via a chip on the ecu board. This chip is called an EPROM. It stands for 'Erasable Programmable Read-Only Memory'. Since you can not change the maps/'tune' on the stock eprom, you will need to get an EPROM that you can read and erase electronically. The eprom chip goes into the socket for easy remove and replace. Soldering the EPROM chip directly on the board will become a pain in the ass when your testing out new tunes. Who wants to solder and desolder every 10 minutes for changing a single cell on the timing map?

What is needed in order to read and write an EPROM?
Well you will need two things; An EPROM burner and EPROM chips. The burner I personally use is a Willens Dual Powered EPROM burner, which I got on ebay for 35 bucks shipped. I got the EPROM chips on ebay for 25 dollars for 5. There are many chips out there but there is only one i HIGHLY recommend. That chip is the 'SST 27sf512'. This EPROM has twice the memory as the stock chip, so you will need to burn the tune on the last half of the chip, which is 008000.

So in a Nut-shell, all you need is
1)EPROM Burner
(MOST eprom burners require an LPT(printer) port and USB for power. You CAN NOT use conversion cables to run the burner via USB!)
2)EPROM Chips
http://stores.ebay.com/XENOCRON-Tuni...QQftidZ2QQtZkm
3)EPROM Socket
http://www.moates.net/product_info.p...products_id=46
4)Socket soldered into ECU

After all that, you just plug the ecu back into the harness and your ready to go! Unless of course you damaged the ecu while desoldering/soldering...

What else is needed after I get the above items?
You will need to get a program that can edit the tunes, a stock tune (can be read from stock eprom after desolder), and an address file. An address file is pretty much a file that tells the tune reader program where each table starts etc etc. You want the stock tune so that you have a base line tune to work off of. And in order to use both the address file and stock tune, you will need a reader. The program I use is RomEditor. It is free but you will need to enable japanese language in order to use.

How do you enable japanese language?
In windows xp start -> control panel -> regional and language options
Under the Languages tab checkmark 'install files for east asian languages'
Under Advanced tab, select japanese in the drop down box. Check mark Japanese in the 'Code page covnersion tables'.
You will be asked for a windows xp cd, insert cd. Windows will install all the needed files and you will be asked to reboot your PC, do so. If your computer is all in japanese, click the JP icon on the task bar and change it to English.

Afterwards you can start tuning! Hell you can even start tuning now using these files!
RomEditor - http://www.club-touge.com/tuning/romeditorE.rar
S13 KA24E Stock Tune - http://www.club-touge.com/tuning/89-240SX-MT.bin
S13 KA24E RomEditor Address file - http://www.club-touge.com/tuning/S13eADR.adr

I have the program, stock tune, and address file... what the hell do I do now?
If you enabled the japanese language correctly your rom editor window should look very simliar to this:

If it doesn't, make sure you enabled japanese language properly.
First you need to load up the address file. To do this:
Setup/Are crowded.. browse to the directory where the address file is located in
Now load up the Stock tune:
File/Load/Load bin.. browse to the directory where the .bin file is located in.

WALAHHH there you have it, you can now see nissan's stock timing map, fuel map, other shit as well! If you have a burner, chips, ecu socketed, change the Rev. Limit 1 value to 1500 (this is located under the global tab). save the file, load up your eprom burner software, load up your new 'tune', change offset to 8000, burn, plug in socket, plug ecu into eccs. start her up! if all is well, your car should now be idling and warming up. try revving your engine past 1500.... i dare you

THERE IS MORE TO COME!!!!!!!!!!
edit.discard the first stock tune i posted, it is for the u12, not s13

[stinky_180]

Space Holder Whats Crackin

SOLDERING and DESOLDERING

[stinky_180]

2nd ... beat you allllllllll

USING YOUR EPROM BURNER! (use for reference, most burners are different... i bought mine a year ago)

[stinky_180]

3rd times a charm.......

CONSULT... whaatttt consult on the ka24e... no way...

YES WAY!

[BigLou240sx]

Good luck buddy! A lot of info out there to get into one place! I've got the burning/erasing down at this point...now I need to work on the actual tuning. First up...adjusting the stock tune for RX-7 high impedance 550's. I may be asking you some really basic questions soon...lol

[bakgwailo]

change K

K = old K * (old ign size/new injector size)

Then, scale all the other scales by the changed K ratio.

then tune K (IE set all closed loop cells to 1, turn off o2 input, then slowly increase/decrease K until you get 14.7 on the AFR between 2-3k). Now restore closed loop/o2 input, and again scale the rest of the scales by the ratio of how much you just changed K.

hope that makes sense... its f'n hot

[stinky_180]

gabe has a spreadsheet for all of this. i'll post up when im done working.

mind you, this post is only an introduction to modifying the ecu for tuning and consult on the ka24e. the actual discussion regarding mapping and all that other stuff will be in another post.

[BigLou240sx]

Originally Posted by bakgwailo

change K

K = old K * (old ign size/new injector size)

Then, scale all the other scales by the changed K ratio.

then tune K (IE set all closed loop cells to 1, turn off o2 input, then slowly increase/decrease K until you get 14.7 on the AFR between 2-3k). Now restore closed loop/o2 input, and again scale the rest of the scales by the ratio of how much you just changed K.

hope that makes sense... its f'n hot

I know about the k value...but scaling all of the other scales is what was throwing me off. I'll have to look more into it, and examine gabe's spreadsheet that I have. Thanks!

Originally Posted by stinky_180

gabe has a spreadsheet for all of this. i'll post up when im done working.

mind you, this post is only an introduction to modifying the ecu for tuning and consult on the ka24e. the actual discussion regarding mapping and all that other stuff will be in another post.

Gotcha I'll keep this as uncluttered as possible. Again, good luck!

[stinky_180]

hey no worries. ask as much as you want! but this post will be mainly for the ka24e and getting started. did you find gabe's spreadsheet helpful?

[bakgwailo]

opps, sorry about that and hijacking!

[PhR0Z3N_PhL4M3]

Are there Emulators for the KA24E (would love to do live tuning, or does it have something to do with the E not having Consult (i could be wayy off, info on tuning is spread out) I'd love to be able to tune on the fly!

[bakgwailo]

any 8bit emulator should work (ie moates, pocketEmu(sp? ionno something like this), etc).

would recommend ditching the 240sx ka24e ecu for a u12 though anyways... consult saves pistons and rods! lol!

[PhR0Z3N_PhL4M3]

Thus this shows my noobness in Rom tuning, I actually don't know what Consult does, and I am guessing the U12 is the stanza? which year? And if you run an emulator do you need a consult cable (or will the emulator pick it up?)?

Basically I have a small idea as to what I need, ECU, socket it, get a burner/emulator (or both!), the software and start tuning (what about consult?) info is kinda hard to find about this stuff (i've searched eccs.hybridka.com, info is just spread out and hard to find)

Thanks

[BigLou240sx]

1990-1992 Stanza ECU. You should still need a consult cable/adapter while using the emulator.

Hybridka is a pretty intimidating site for people fresh into tuning, but just keep reading over there. The information may be hard to find...I would suggest taking notes, because you're right, the information is not in one place and very spread out. You may read something handy and forget where it is..lol

[PhR0Z3N_PhL4M3]

Awesome, I just got back from the junkyard, pulled a 91 stanza ECU (manual) ordered my consult cable from EBay (>.<) and my zif socket and Willem burner and some chips to g along with it so I'm pretty close to being able to mess around with this stuff, I plan on using it mostly when I got KAE-T but I'm sure I can fiddle with some NA tuning, and at least I can get some good data logging in.

[nelson8708]

Could some one help me out and do a write up on what pins need to be wired up for consult to work with the u12 ecu? My buddy has the consult cable and we both have tuned u12 ecu's but i cant seem to find any info on what wiring needs to be done in order to use the consult.

[BigLou240sx]

You need to put 3 spare ecu wires into pins 7, 14, and 15. They are the pins closest to the center bolt of the blue harness-ecu connector. If you look on hybrid ka, you'll see what pins go to tx, rx, and clx (or something like that) and match that up to your consult connector. Then you neeed to pick up the +12v and ground.

[nelson8708]

i have searched hybrid but, it is such a commonly used word on there every thread pops up...i have searched through probably 20 thread and still havent found the info i need. If / once i figure it out and wire it up i will post a How-to thread on it.

EDIT:

Was bored tonight so i searched for a little bit and found enough info for me to go ahead and wire it up.