Nissan ECU Tuning

Jollwah · Joined: 22 Nov 2007 Posts: 21

Looking into emulation options for a R33 ecu.

Is this viable.

using a 16 bit emulator using a emulator adapter to a 84 pin PLCC socket.

link for emulator adapter.
http://emulator-adapter.com/parts/S01-84LC-SD.shtml#

link for emulator
http://microcontrollershop.com/product_info.php cPath=180&products_id=841

Then wrtie chip using Moates APU1 with an adapter.

I am not from a computer related background so I might be missing something here...

darkhalf · Posted: Thu Dec 27, 2007 1:14 pm Post subject:

Yeah you are... The processor is 8 bit for starters. Most emulators emulate the ROM only.

If you remove the processor, then there will be nothing running Confused

The daughterboards for R33 utilise the existing CPU and multiplex port lines and external ROM by using programmable logic chips

You put an 8 bit moates/romuulator emulator where the external ROM is ... and then you have R33 with emulation

The daugtherboard is the expensive part

Jollwah · Joined: 22 Nov 2007 Posts: 21

Ok, that makes sense Embarassed

I guess my options are the daughter board as discussed above, or using a z32 ecu.

Which is the best option, I was thinking of using the z32 ecu but I am not convinced Confused

darkhalf · Posted: Sun Dec 30, 2007 11:54 am Post subject:

Z32 has VVT capabilities, requires a small amount of rewiring. R32 is straight plug in but no VVT support

One of the workshops we support has his R33 running using Z32 ECU and I did the initial base ROM for him to get started. Says it runs well now after some tuning. Still to grab the exact wiring modifications required from him

Jollwah · Joined: 22 Nov 2007 Posts: 21

I think that I have the wiring changes down in relation to fuel and ign firing order.

I'd probably use a Z32 AFM.

have heard a that the pwr steering switch polarity needs to be inverted.

Just unsure about knock sensor wiring as the Z32 has 1 and the R33 has 3.

Eric · Joined: 17 Nov 2003 Posts: 254 Location: Holland

>> One of the workshops we support has his R33 running using Z32 ECU

I'm using Z32 ECU's for R33's for some time now and I can highly recommend it.

Got fed up trying to get 33's running properly using HNR32/HCR32 ECU's.
Even after modifying parts of the code to software simulate the throttle switch and a few other things, I still wasn't satisfied ....these things are just too limited. (imo)

advantage of the Z32 ECU is it will retain VTC on the R33 and the Z32 ECU has in/outputs left when used on the R33, which can be used for other purposes (only possible after extensive code modification though)
For one customer I reprogrammed a "Z32 ECU converted R33" to have the ECU switch water injection, have a map sensor instead of a MAF sensor and have the "check engine" light come on when detonation was detected.

When using a Z32 ECU you can basically use a stock Z32 binary and copy over the most important constants, maps and tables from the R33.
To get it perfect some parts of the code need to be modified, but with stock code it will already run 10 times better then when using a R32 ECU

>> Still to grab the exact wiring modifications required from him

for the RB25DE(T) based R33's these are the wiring modifications:

R33 pin 19 to Z32 pin 34
R33 pin 105 to Z32 pin 110
R33 pin 110 to Z32 pin 105
R33 pin 112 to Z32 pin 114
R33 pin 114 to Z32 pin 112

R33 pin 57: cut
Z32 pins 29+52 : join

Best is to use a FIELD harness extender, so you don't have to chop up the original wiring harness.

Because an unmodified Z32 ECU only has 1 detonation sensor input, you will have to choose which sensor you want to use.
if you leave pin 23 (r33) connected to pin 23 (Z32), it will monitor the sensor for cyl. 1-3
if you rather have it monitor the rear cylinders 4-6, you will have to cut pin 23 (r33) and connect pin 24 (R33) to pin 23 (Z32)

Only thing I haven't been able to figure out, is how the auxilary fan on the R33 is switched....can't find it on any of the wiring schematics I have.

-Eric
_________________

DTA-motorsport

cb_drift · Joined: 04 May 2004 Posts: 468 Location: New Zealand

is the z32 ecu able to handle the tps signals and switches better than the r32 ecu doesn't?

its a pain in the neck making the r32 one run right and sometimes they just had hissy fits and randomly change the afr by huge ammounts....

is the tps setup the same on the z32/r33 and different on the r32?

just trying to understand things a bit better Smile

Jollwah · Joined: 22 Nov 2007 Posts: 21

I thought the aux fan was simply controlled from the thermo switch that is located in the radiator..

I'll check and post back...[/quote]

Jollwah · Joined: 22 Nov 2007 Posts: 21

The overtemp fan is definately controlled by a thermo switch located in the radiator.

Does the Z32 ECU fire the injectors in batch fire. If so is it actually necessary to change the injector wires.

For those that are interested.

Checked the ecu pinout in my r33 engine manual and the ignition pins are the same for s2 r33/s1 r33/z32.

Jollwah · Joined: 22 Nov 2007 Posts: 21

Batch fire I dont know what i was thinking...

Anyway am thinking of using a 16" thermofan in place of the viscous fan in my r33.

I've been thinking that I could control this using the z32 ecu.

Now I've been looking at a z32 wiring diagram and the rad fan sig seems to come from pin 19 and 6.

So the plan to try is,

use sig from pin 19 to fan relay to switch fan on.

and I'll use a z32 coolant temp sensor in place of the r33 item.

Not 100 % sure that this will work as I don't quite understand how the variable speed bit works etc.

Any feedback would be appreciated.

Cheers

Jollwah · Joined: 22 Nov 2007 Posts: 21

davesteedy · Joined: 27 Apr 2008 Posts: 5

Hmm, ok, so just to summarise:

R33 Series 1 (& 2?) can be successfully run in the following ways:

1: R33 ecu with chip socket and once only write chip
2: R32 ecu (do you need to swap injector 4 & 6 wires?) but no VCT control, a TPS problem (can anyone clarify this?) any other issues?
3: Z32 ecu - requires some repinnig, (perhaps a powers steering issue?), otherwise great with vct, electric fans, and other possible outlets.

Anything incorrect here? or anything else to add?

darkhalf · Posted: Mon Apr 28, 2008 2:03 am Post subject:

R33 ECU with daughterboard (cost about $600-$1000AUD)

I am investigating making a realtime board for these ECUs

cb_drift · Joined: 04 May 2004 Posts: 468 Location: New Zealand

best1tuning makes and distributes rb25det daughterboards that take an eprom.....

pretty expensive tho... would be good for a workshop to own one and then use it to tune customer cars and burn one time chips for them Smile

$800us for a chipped ecu....
where you supply shipping and an ecu and get back a chipped ecu Smile

darkhalf · Posted: Tue Apr 29, 2008 6:16 am Post subject:

I dont think they make the boards themselves (prob just distribute and install and keep their supplier secret)

I saw those boards originally for sale from a place called Kami Station in Japan many years ago (now out of business) but you had to be a distributor to order from them

Still got a printout of the instructions from that site lying around