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You really are new. :)
Search ECU. There is only one reputable manufacturer. There is no chip for a Nissan. There are daughterboards attached to your ECU.
www.jimwolftechnology.com
Anything for the Sentra SE-R will work on a NX2000.
 

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This from the SE-R.NET.
"ECU
For engine modifications, Nissans have a big advantage over many other sports compact cars. Since Nissan’s ECU fuel and spark tables are driven by the airflow meter output, the ECU can automatically compensate for changes in volumetric efficiency unlike the speed density systems on Hondas. In otherwords, mild camshafts, headers and head work can be used without automatically causing the engine to lean out. The greater the airflow the more fuel the computer will inject up to the limit of the airflow meter voltage curve or injector capacity. Even with this inherit advantage, there are still comprises in the stock ECU programming. The stock ECU is tuned to be able to run on bad gas, and to maintain drivability and clean emissions even with poor maintaince. Since this car is well cared for and feed a diet of high octane-fuel, there is room for improvement.


With a very careful selection of components, we were able to find an honest 29-hp gain without sacrificing horsepower anywhere, and without triggering any OBDII trouble codes!
For this improvement, we turned to Jim Wolf Technologies. The Wolf ECU works best with the timing set at the factory maximum of 17 degrees BTDC. Advancing the timing more than this will cause a loss of power, especially on the top end. The Wolf ECU modifies the fuel and spark maps for optimal performance while maintaining OBD-II compatibility. Wolf removes the top-speed-limit fuel cut function from the program. Wolf also raises the stock rev limit of 7000 rpm to 7700 rpm, which was a big help because we were continually bouncing off the factory rev limiter with the stock ECU.

The Wolf ECU also limits the amount of high temperature and or knock sensor response retard. This is an area where Wolf's years of experience in racing shows. Wolf discovered that the SR20DE's stock tuning is overly sensitive to knock. Normally, when the knock sensor recognizes the onset of detonation, the ECU will retard ignition timing to prevent further detonation. Unfortunately, retarted ignition timing also tends to increase coolant temperature, which, in turn, increases the tendency knock, which causes the ECU to further retard timing, etc. In the end, coolant temperature soars and power output suffers. Though the conditions needed to start this thermal overrun are rare for the average Joe, aggressive driving can bring coolant temperature into the range where this will happen frequently. The reduced ignition retard response of the Wolf ECU prevents this vicious cycle from starting in the first place.

These extensive program modifications are no small task considering that the vehicles engine control processor talks to the OBD-II monitoring processor. Any disagreement between the two results in error codes and headaches.

The Wolf ECU made a very noticeable difference with improved throttle response and greater top end power. Best of all no check engine lights appeared indicating zero error codes. Because of the advanced ignition timing and reduced knock sensor retard, the Wolf ECU requires the use of 92 octane gas, but if you want the most power out of the stock engine, 92 octane is a must anyway.
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That should help.
 

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Hey, wow that was helpful. Is there two different ECU's for the 94 and below sr20de's and the 95 up sr20de's? Because, I've read that the 200sx has a redline of 7000rpm and it says there that there is a rev-limiter there. On my car, however, I've pushed the engine almost to 8000 rpm's once and I haven't hit a rev-limiter. Also, are there two JWT ECU's or just one for the sr20de in general?
 

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drummer4lifex said:
On my car, however, I've pushed the engine almost to 8000 rpm's once and I haven't hit a rev-limiter.
WEll for one, Nissan Tachs aren't the most accurate ones in the world.
Also, it's not a good idea to make a habit of over revving the engine as this is a sure fire way to wind up with rocker arms and shims thrown all over your motor.

As for the different JWT ECU's there is a basic program for lightly modded cars.
Then there's the S3/4 cam program. A program for Nitrous. Various turbo programs etc., etc.
 

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Is there a usual area in which the tachometers are inaccurate? For instance, might they read 200rpm's higher than the engine is really running at?

Also, what did they use to get 29 extra hp?
 

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drummer4lifex said:
Is there a usual area in which the tachometers are inaccurate? For instance, might they read 200rpm's higher than the engine is really running at?
I have been told, by stealer mechnics that now their sh*t, that the OEM speedo and tachs can be off as much as +-10%.

Also, what did they use to get 29 extra hp?
That was with ALL the bolt-ons.
 
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