A community of enthusiasts dedicated to Nissan's SR20DE/SR20VE/SR20DET engines.
Start here: forum search. Be sure to search on what you're looking for before posting a new thread.
You are currently browsing the forum as a guest. In order to access special features, the image gallery, and post you will need to be a registered member. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact the administrator.
I put the KA24DE and SR20DET files side by side, I then viewed the SR .adr file as a word pad doc. Then manually typed in the addresses in my hex editor, every thing matched.
Other than the multiple speed limits, and rev limits, I dont see any real variation in address location.
The first rev limiter adr worked (came up with 6875 rpm), and the first speed limiter adr worked (came up with 108.xx mph)....but, I dont really understand the others. Why are there more than one rev/speed limiters?
Yeah, I cant wait to start blowing up motors with my new found knowledge.
In addition to removing my EGR system. First thing Im going to do is see how well the KA24DE will respond to linear maps vs. the choppy oem maps. I read the OEM maps are all choppy for smog/pollution control reasons. Just wanna see what smoothing them out does.
So in the mean time I have 3 KA24DE ECU's ready for some punishment.
Do me a favor, pop the top on one of those KA24DE ecus and take a good high resolution photo and post it here. Thanks.
I don't know why multiple rev and speed limits are given, other than some versions of the rom actually have them in those places. I've never tried changing one of the other listed limits that doesn't seem to be a limit.
__________________
All posts by Calum in this thread are copyrighted by Calum, and cannot be edited, deleted, or copied without his express permission. calum@calumsult.com
I don't know why multiple rev and speed limits are given, other than some versions of the rom actually have them in those places. I've never tried changing one of the other listed limits that doesn't seem to be a limit.
Presumably they are there for extra-security reasons. Assuming of course that there is actually code in the ECU for that, there are at least 2 speed limiters and 2 rev limiters.
The First one, lets call it "Instant Limiter" cuts off as soon as the ECU sees the respective figure higher than what is in there.
The second one, lets call it "Extended-USe Limiter" cuts off when the ECU sees the respective figure higher than what is in there for a specific time period, something like 5 seconds.
THe Extende-Use one should of course by a bit lower than the Instant one.
Presumably they are there for extra-security reasons. Assuming of course that there is actually code in the ECU for that, there are at least 2 speed limiters and 2 rev limiters.
The First one, lets call it "Instant Limiter" cuts off as soon as the ECU sees the respective figure higher than what is in there.
The second one, lets call it "Extended-USe Limiter" cuts off when the ECU sees the respective figure higher than what is in there for a specific time period, something like 5 seconds.
THe Extende-Use one should of course by a bit lower than the Instant one.
Chris
Good info.
Ive asked that question in a couple other post...no one seemed to be able to answer.
I've never actually seen an SR20 ecu use both limiters though. Have you actually tested that? I'll try this weekend.
JayLew, what I was after was whether the board was the same. Awesome.
On the subject of daughterboards, mine are $100 installed, shipping inlcuded, or $100 shipped you do the install. I much prefer people let me do the install because most people overestimate their mad soldering skillz. Moving the CJ1 jumper to CJ2 is tricky if you've never done it before. Wait 'till the B14 boards come out, the jumper you have to move is one size smaller. Hopefully they'll be on the sr20forum storefront soonish. Right now (ver 0) they're dual 29c256 based, with ZIF sockets so changing the roms is easy, both roms burnt straight up no multiple images. I've got 4 ver 0 boards left, when those are gone ver 1 will move to a different rom (the 29c256 is out of production).
Also if your looking for consult stuff, I'm going to have boards and kits available soon (boards are ordered again). I won't sell them assembled, they take too long to build. Look for a HOW TO in about two weeks. I laid out these board expressly for the home kit builder, lots of room, everything is labeled, very straight forward. Also have a schmitt trigger buffer on the input so they should (cross your fingers) work with every nissan consult enabled ecu.
Right now (ver 0) they're dual 29c256 based, with ZIF sockets so changing the roms is easy, both roms burnt straight up no multiple images. I've got 4 ver 0 boards left, when those are gone ver 1 will move to a different rom (the 29c256 is out of production).
Also if your looking for consult stuff, I'm going to have boards and kits available soon (boards are ordered again). I won't sell them assembled, they take too long to build. Look for a HOW TO in about two weeks. I laid out these board expressly for the home kit builder, lots of room, everything is labeled, very straight forward. Also have a schmitt trigger buffer on the input so they should (cross your fingers) work with every nissan consult enabled ecu.
I already have 2 AT29C256's. So all I need is your board with everything, except for the memory. I dont even own a soder gun, so I was going to have a local shop install it.
Im definetly looking forward to the consult how to.
As soon as my eBay ecu gets here, Ill test it, then we can set something up for the DB install.
Since the motherboard part numbers are identical (S13/B13), Nissan probably ordered several hundred thousand of these boards. Chances are that ALL of the traces are identical (ie...lead to the same place).
So in theory, to run an S13 engine using a B13 ECU would be a matter of changing the .bin file to the S13 .bin.
In my car, where everything is manual, no cruise control, no airbags, no power seat belts (I disabled them).....even if the SR20 Ecu has slightly different controls for misc. electrical stuff.....my car might still be able to run off of it (as long as its a KA bin).
This would help some people jump platforms, S13 to B13 or vis versa, and, take their DB'ed ecu with them. Seeing as how I have both a B13 ECU and and 3 S13 ECU's, Im going to try it.
JayLew, I can't seperate the 29C256s, sorry. I bought 50 to go with the 25 boards I had made for the ver 0 run. If I don't sell them with memory I eat the cost of the memory. Because I'm moving to a new design I can't just use the memory on a later boards (well, ok I could, but wheres the fun in that?). I know it sucks, but um, theres not much I can do about it.
paNX2K&SE-R, don't expect too many feature changes. Mostly physical changes, maybe some other stuff. I want to keep them compatible with romulators, so that limits me to 28 pin roms, that plus I don't want the cost to change pretty much limits me on features. There might be a couple of versions, its all about what I can squeeze onto the pcb.
What features do you want?
Since the motherboard part numbers are identical (S13/B13), Nissan probably ordered several hundred thousand of these boards. Chances are that ALL of the traces are identical (ie...lead to the same place).
I imagine its larger then that. I'm 99% sure altima ecus are the same too. This is worldwide. Thats a crap load of cars. It was large enough that JECS farmed out the job to other companies, I've got a european Bosch manufactured primera ecu with the same board.
Just one point, DET ecus and DE ecus are different. The hardware to run the coil packs is different.
If you do have 1 left I want it, but, I only have $65 in my Paypal account, so if you dont mind waiting the 3 to 4 days that it takes for money from my bank account to be moved to my paypal account then I would appreciate it.
Actually I can give you a down payment now ($65), and when the other $40 is makes it to my account then Ill send it to you.....that is if you still have one.
No, sorry, I've got 2 left. I had 4 this afternoon, 2 sold this evening.
I'll hold one, no worries. Just send me the full amount when you've got it. cjj6558@tntech.edu is my paypal account. I'll provide a shipping address for your ecu upon payment.
I imagine its larger then that. I'm 99% sure altima ecus are the same too. This is worldwide. Thats a crap load of cars. It was large enough that JECS farmed out the job to other companies, I've got a european Bosch manufactured primera ecu with the same board.
Just one point, DET ecus and DE ecus are different. The hardware to run the coil packs is different.
EDIT: Youll have your payment by early next week...only because Im not sure paypal works on the weekend???? Thanks.
Your right, I wasnt really thinking global.
And I remember you saying in another post that the DET and DE ecu's are non-interchangeable.....that is unless you convert your coilpacks over to a USDM distributor set up.
No, sorry, I've got 2 left. I had 4 this afternoon, 2 sold this evening.
I'll hold one, no worries. Just send me the full amount when you've got it. cjj6558@tntech.edu is my paypal account. I'll provide a shipping address for your ecu upon payment.
What are you selling? Are you tuning computers?
__________________
jason
with more se-r's, g20's, and 240's with custom motors than what's allowed to be posted here JGY.cc
I don't want to be in the business of tuning ecus. All a daughterboard does is let you change the rom on the ecu. Tuning the rom is up to you, and thats what I want to see this forum talking about. I'd really like to see a set of public well-documented roms developed for all the common configurations. Its got a long way to go.
Hopefully they'll be on the sr20forum storefront soonish. Right now (ver 0) they're dual 29c256 based, with ZIF sockets so changing the roms is easy, both roms burnt straight up no multiple images. I've got 4 ver 0 boards left, when those are gone ver 1 will move to a different rom (the 29c256 is out of production).