Nissan ECU Tuning

92GTA · Joined: 11 Oct 2007 Posts: 14 Location: Bakersfield, CA

I need to buy a second ECU so that I can send it off to be socketed so I can start tuning.

I have a U.S. spec N/A 1993 car but I wanted to buy the latest available to take into account any tiny ECU revisions that might have occurred such as resister/cap/PCB changes, etc. Little things that make a difference but never justified an update P/N from Nissan you know.

Because of this I wanted to buy a U.S. spec N/A 1995 ECU since that would be the very last of the OBDI ECU's.

My question: This will be a direct replacement right? As far as I know there were no harness/sensor/pin-out changes between '93 and '95 right?

My side question, lol: Is the only difference between a Turbo ECU and an N/A ECU the tune or are there other differences in regards to the ECU it's self?

Lastly, Does anyone know the P/N for the 1995 ECU so I can try and buy one from Courtesy Nissan or some other source? I'd hate to buy one used and get screwed by the seller and be sending off a bad ECU to be socketed. Plus since 1995, there may be other small updates to the ECU that would be included in a brand new unit straight from Nissan. Anyone know if there are revision or version #'s stamped into the ECU's PCB or on an outside label or something?

Thanks!!! Alex
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1993 300ZX (Built 12/92): 2+2, VG30DE, RS5R30A, 224K Chassis, 29K Engine. Glacier White Pearl (KH6) & Tan Leather (C). Keyless w/Alarm.

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

1995 NA ecu's are all 16 bit and are much harder and more expensive to modify.

stick with your 1993 ECU and use a later revision rom (if you can find one)
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DTA-motorsport

92GTA · Joined: 11 Oct 2007 Posts: 14 Location: Bakersfield, CA

Doesn't that just have to do with the size of the .bin file burned onto the chip and not any changes in the ECU it's self? I think the actual ECU's are the same right?

If they are different, can't I just burn my 8-bit .bin at the correct starting address of a 16-bit or simply convert my 8-bit .bin into a 16-bit .bin file?

Calum · Joined: 11 Feb 2004 Posts: 226

No, the hardware is totally different.

Btw, Nissan doesn't rev anything when you buy a 'new' ecu from the dealershipvs getting the same ecu for the same year car from a junkyard.

92GTA · Joined: 11 Oct 2007 Posts: 14 Location: Bakersfield, CA

K, thanks!