R34 Gtt Series 1 V Series 2 Ecu

[Bugzs15]

I was wondering if anyone has used a stock Series 2 ecu in a series 1 R34GTT.

I have a series 1 R34GTT manual and want to install a series 2 ECU.

I know there was a torque increase in Series 2's and a few other changes, so I am wondering if the ECU was different as a result.

Thanks

[Shibbby]

I have a Nistuned GTT ecu that's already been tuned for Air filter/interfcooler/exhaust and 12psi for sale for $400

For example you're better off buying something like that and then getting your afr checked on a dyno or even a touch up tune.

I really can't see any benefit in trying to chase a particular series ecu for little to no gains when you can have the car setup perfectly for its current time real world condition.

[GTSBoy]

There's not enough difference (if any at all) between the ECUs to make changing worthwhile. I concur with the above advice.

[Bugzs15]

Reason i ask is because i currently have an impul ecu which is tuned for jap fuel i think. I bought a series 2 ecu to put in my car to avoid any issues driving using 98ron. I have however bought a series 2 ecu and wanted to check that it will work ok in a series 1 before i install it. Definitely didnt get it for the power increase in series 2. Just wanted to make sure it was compatible. Fron what i read the extra power in series 2 comes from revised cam shafts, and wanted to see if the ecu was revised to accomodate the cams. Cheers

[GTSBoy]

The maps in the ECU might be slightly different. You'd never notice.

[jhjones]

Just letting you know from what I've found the s2 manual models have a different exhaust cam, compressor wheel and compressor housing compered to the auto s2 and all s1 models.

[Bugzs15]

Just letting you know from what I've found the s2 manual models have a different exhaust cam, compressor wheel and compressor housing compered to the auto s2 and all s1 models.

Would the different exhaust cam mean a different map in the ECU? Would this ECU still be ok for a Series 1, or is the tune very different?

Edited May 23, 2014 by Bugzs15

[jhjones]

Most likely. Not sure if it will be ok for a series 1 and I don't know how different the tune is.

I recommend you get a tuneable ECU and tune it or pick the ECU that your engine came with from the factory if the car is stockish just for peace of mind.

ECU partnumbers:

http://webbersrbguide.com/index.php?option=com_content&view=article&id=58:rb-ecu-part-numbers&catid=45:wiring-electrical-a-ecu&Itemid=23

[Ben C34]

Stock ecu tunes are always very safe, so I seriously doubt the would be a problem.

Get a nistune board installed and get the car actually tuned.

[Ben C34]

ok, so i looked at My copy of nistune in relation to r34 ecu's as I was curious.

There are approx 6 different image files, and this is the biggst difference i could find quickly comparing them. Alot were identical.

The timing maps had a copule of spots with 1 or 2 degrees different, wouldnt matter at all.

this snip is comparing 2 fuel maps.

i would call them the same....

you can download nistune as a trial, load them up into the main and comp slot, then click the magnifying glass to compare.

[Bugzs15]

Thanks very much for confirming everyone, looks like it will be good to use.

Hope this post helps anyone else with similar question in the future as a lot of ecu questions relate to R33, but not many for R34.

[Ben C34]

No worries.

If your engine explodes be sure to let us know

[GTSBoy]

Not that I didn't already say pretty much exactly that before.....

[Ben C34]

[Ben C34]

Sometimes it takes someone else saying the same thing.....

[scotty nm35]

Sometimes it takes someone else saying the same thing.....

[wolverine]

Just letting you know from what I've found the s2 manual models have a different exhaust cam, compressor wheel and compressor housing compered to the auto s2 and all s1 models.

I'd love to see some hard evidence that manual and auto have different exhaust cams and different turbos.

Series 1 are obviously different from Series 2. (compressor wheel from memory)

Edited May 23, 2014 by wolverine

[jhjones]

This is what I have found.

Exhaust cam on Nissan fast

August 2000 or newer (Manual only)

13020-AB000-

All other RB25DET Neo

13020-AA020-

Turbos on Nissan fast

August 2000 or newer (Manual only)

14411-AB000-

May 1998 to July 2000

14411-AA100-

July 2000 to August 2000

14411-AA110-

August 2000 or newer (Auto only)

14411-AA110-

Alternate part number for 14411-AA100- is 14411-AA110-

Also found

http://2style.net/r34sedan/hikaku/hikaku02.htm

http://www.skylinesaustralia.com/forums/topic/69089-differences-between-r34-and-r33-turbo/#entry1527454

Edited May 24, 2014 by H4x