rev limiter and rea end gear

[drpoling]

does anyone know how to get away from that damn rev limiter and I was wandering about changing the rearend gear since its rearwheel drive and get a bit more horses outa the tranny. I'm new to nissans. I've done my share on Honda's, pontiac fieros ( 6cyl gt pkg ) and little work on jags so any help on finding these parts or anyother info about this car would be appreciated!

1990 240sx ( manual )

[psychedelicbeats]

i've heard how people splice a specific wire(the rev limiter) in the ecu and made a switch for turning on and off the rev limiter. i'm pretty sure you can look around further. goto www.240sx.org they got a lot of info i think that's where i found the info also

[ImPLiCiTS14]

what about the speed governor it kinda sucks hondas can go past 115

[canisay182]

heres the procedure from 240sx.org I actually just completed the task last week.It's not too difficult to do yourself as long as you have the ability toramp or lift the front of your car up enough to get to the transmission. Here's the procedure. First you must disconnect two sensors (presumably RPM limiters?) from the tranny. One is the fourth gear sensor, while the other is the fifth gear sensor. If you look at the transmission under the car there are supposedly four (4) sensors (I only saw three, but the fourth one is somewhere under there), the ones that need to be disconnected are the middle two (2). The electrical connections are simple snap lock configured so not cutting is required. Once the two connections are disconnected, I recommend you thoroughly tape over the ends of the connectors to prevent moisture from entering within.

By doing this step the ECU doesn't know your 4th or 5th gear RPMs, therefore it won't limit you. Note: If you have faith in placing your car on jack stands (some members have done this) you can test the limiter for each gear before and after each step. What you'll find is that the ECU limits the top end RPM for 4th and 5th gear before you disconnect anything. Afterwards, the skies the limit.

The last step is to disconnect a control wire that comes from the tranny area and passes by the passenger side of the starter in the engine compartment. You'll find another simple electrical connection (looks like a tube style fuse holder) with small gauge wire. Unhook this connection and then drive your car and you'll notice the speedometer doesn't work, nor do the number onyour odometer change. What you've disconnected is the sensor that transmits the speed to the ECU and the display. Now the computer tries to watch your speed to make sure you don't go past 115mph (S13 model, S14 may vary higher), but never cuts off your fuel since it doesn't have a clue how fast you're traveling.

Since most of us don't cruise over 115mph you may want to wire a switch into the speedo connection just mentioned. I used a simple red rocker switch and installed it into the blank Nissan console plate located to the right of my
rear window washer/wiper control buttons.
now you dont have to install a new switch i just wired it to the head light pop up switch cause i didnt ever use this button

[ImPLiCiTS14]

yuh but isnt there a way to do it and still get the speedo to work??

[cypres]

on my 91 there is a yellow wire with green stripe, 8th one over from right on harness. This is the vehicle speed sensor signal. Cut that wire. That is it. If you have a California car I think it will trigger a code, but for the rest of us, it is an easy trick. Your speedometer will still work because the signal comes from the tranny, goes to the gauges, THEN feeds the computer. works fine, you just have to guess how fast you are goin since the speed tops at 115

got my to about 122 mph, judging by the rpms i would say i could have gotten to 135 max