KA OR SR??????speed sensor?????

[9240sx]

im putting the sr in my 92 240 and i want to keep the usdm gauges,in mph.so do i use the ka speed sensor or will the sr one read out in mph?or when i have my wiring harness job done will that fix my problem? one more thing, the s13 sr redlines at 7500 rpm right?so can i take my tach to 7500 rpm even though it redlines at 7000rpm?thanks for the help!

[f150intally]

The speed sensors are identical so use whichever one has the least miles on it.

Since you have a DOHC, your tach will work fine. just you can take a black sharpie and color over your current redline up to the new redline if you want to.

[SideWays Silvia]

u use the speed sensor from the KA to read out mph the sr will read km

[FTRS14.5]

Of course you can take it over the original 7k redline. That's just there for informative purposes. It's your ECU that will cut the revs when it gets too high. The wiring service will not fix the problem between MPH and KM. You'll need the KA speed sensor for that.

[f150intally]

u use the speed sensor from the KA to read out mph the sr will read km

This is a misconception. The speed sensors are the same. It is the cluster that reads km/h vs. miles per hour.

[FTRS14.5]

This is a misconception. The speed sensors are the same. It is the cluster that reads km/h vs. miles per hour.

So are you saying that there is no differences in the speed sensors and that the cluster is the one that determines which way to read the speed? I don't think that's true. So if I were to bring my cluster to US Cluster to Japan and install it, it would automatically read KMPH? Hmmmm......The cluster is only a so-called "informative device" on the car. It has no capabilites to determine which way to read a signal. It can only understand what the ECU and it's sensors tell it. That's what the "speed sensor" is for. The ECU gets the signal form the sensor and relays it to the cluster to show a read out. If you have a sensor built for KMPH, then your ECU will translate the code in KMPH and pass it onto your cluster in.......KMPH and Vice Versa. If all the sensors were the same, big name companies would not be telling you to swap your sensors, i.e Heavy Throttle, Phase2, Enjuku, etc......

[f150intally]

Dude, not to be a **** but you apparently have no idea how it works.

The speed sensors are the same. Do some more searching and you will find this out. Better yet, call Jeff at Heavy Throttle and he will tell you. The only difference there may be is the gear on the end of the speed sensor. Almost all KAs and SRs came with a red gear on the end. As long as they are both the same color (which 99% of the time they are) they will read the exact same. I have a KA and SR speed sensor and have personally verified it.

As a matter of fact, why would nissan make the speed sensor different? All it does is send a voltage to the speedo. It is up to the speedo to determine where to put the needle based on the voltage.

Straight from Jeff at Heavy Throttle

[FTRS14.5]

Hmmmm, alright, understandable. I was always told that they were different, but I guess that info was incorrect. Learn something new everyday. My apologies for the previous post So in order to compesate for the difference, you would have to recalibrate everything??

[f150intally]

No... you do not have to recalibrate anything. The instrument cluster is the part that is calibrated. When sent the signal, the JDM cluster will display the KM/H.

Have you ever noticed that the USDM cluster has MPH as the primary measure and KM/H as a secondary measure? How is it that they do that? Same concept.

Sorry if I came off wrong, just trying disseminate the spread of misinformation. There is a lot of that on these forums.

-Jay

[GTS4-R]

`JDM gauge = JDM sensor....EASY!

[SpeedRacer1]

USDM and JDM speed sensors may not look the same, but they will give the exact same reading. Like F150 said, its the gauge itself that does all the thinking. ECU doesnt change the signal, sensor just senses, not interprets. If you were to take a KMH gauge and put it in your car it will read your speed in KMH and be accurate.

Redlines are just paint on a gauge face. The ECU hits a certain voltage cuts fuel on its own. If your gauge came with a redline painted at 1500RPM's that doesnt mean the ECU will go "uh oh ive entered the gauges redline, time to settle down." A gauge it a gauge, it merely shows information, it does not control it.