POLL: s13/s14 chassis w/ rb25det swap, does your speedo work?

[rb24t]

lsauto 180mph s13 w/rb25 speedo ftw

[93RB25sx]

I'm with ninety the speedo mod worked for me used the kmph and magnetic pick up that I tapped into my mod LSD cover I have a SII

[ANVIL]

mine read about half then i just bought the 180 ls auto one

[mentordrift]

lol looks like I'm the only lazy bastard who doesn't care about a speedo and uses his Tach. It's only good to 115 anyways.

Haha, that makes two of us who just use their tach.

I have thought about getting a TomTom V1 or just finally stopping the lazy streak and crawling under the car and splicing two wires...but hey, you do what you do, right?

[johnny butt]

pretty old thread.

I've got an RB25 S1 in my S13 and I am using a DOHC Cluster, my tach works fine after being recalibrated, but i'm not exactly sure what I should do to get my Speedometer to work right. Everything else on the gauge cluster works right (fuel, temp, tach, etc.)

Haven't exactly checked to see how far off my speedometer is but I know it's nowhere close.

Also, my boost controller is reading in KM/H, and it matches up on my speedometer, but it's not how fast I am actually going.

Any recommendations, or is there a simple fix to this? (Some say Z32 speed sensor but IDK...)

[DustinZ]

I have done one S1 rb5 in an s13 with custom mounted z32 tach and cluster with z32 speedo gear with rb25 gear on it if I remember. It read a little low because I have 3.90 in the back. The other s13 is a hud car and uses dakota digital ppm converter. The Z32 speedo car does not show speed sig on my consult though.

DustinZ

[Bluefire]

I have JDM S13 Speedos for sale. If your stock ka speedo is reading too slow, the JDM S13 speedo can be calibrated with the pot on the back. Plus your speedo will read up to 180... email me at [email protected]

-Bluefire

[rustbucket]

S13/RB25 - wired myself, wired in R33 GTS-T cluster, everything but the door ajar, boost and speedo work. I have used a friends car to pace my speed and wrote down engine rpm in 2nd, 3rd and 5th for 25, 35, 45 and 55 mph on an index card. Still havent hooked up reverse lts or speedo, i'm not gonna lie im pretty f'n lazy.

[ArmadaJspec]

RB27 T88/ Trust Dog Box transmission RWD 6 speed in a 240sx S14 .... need 95 240sx speed sensor.. anyone?

[Neejay]

I have JDM S13 Speedos for sale. If your stock ka speedo is reading too slow, the JDM S13 speedo can be calibrated with the pot on the back. Plus your speedo will read up to 180... email me at [email protected]

-Bluefire

both of my stock s14 speedo and my converted jdm speedo work perfectly when i run my stock tires (diameter) but when i run my 255-50-16 tires in the rear it reads about 7mph high. i did my own wiring and my reverse lights work and speedo.

i got the same thing. JDM 180km/hr speedo converted to MPH with the pot on the back

Did you all just adjust it all the way to the left?

[Thanielson]

my speedo works perfect ian who dd the install did the wireing. but my rpms are off.

[Neejay]

I just put a Z32 speed sensor in and used the red gear.

It seemed accurate.

Now i have an RB20 trans though with a KA24DE speed sensor so its almost perfect.

The red gear is the stock rb25 gear isn't it?

So you just used a usdm z32 vss and moved the gear to the it? S13 or S14?

[Tims_240]

i have a S14 wit a s13 blacktop Sr and nothin on my cluster works but the gas tack what should i do to fix this?

[CDub7]

I know this is an older thread but maybe someone could help me out i have an 89 240 with s2 rb25det i need the reverse lights to work for it to pass inspection any help would be appreciated but my speedo is about half and my rpms are also about half. .can i "calibrate" these myself?

[HxC_Nismo]

I know this is an older thread but maybe someone could help me out i have an 89 240 with s2 rb25det i need the reverse lights to work for it to pass inspection any help would be appreciated but my speedo is about half and my rpms are also about half. .can i "calibrate" these myself?

you have to wire up your reverse light switch up to your factory reverse light harnes, it doesnt matter wich reverse light switch wire goes cause its just an on off switch.

[CDub7]

alright. . . i dont wanna sound like an a** but i just got this car and working all the bugs out and learning an a** load bout the rbs. this is my first rwd turbo. .where is this harness near / at? sry man

[HxC_Nismo]

the reverse light harness plug is right by the fuse box on the passenger side (S14). you take the green and white wire and wire it up to the reverse light switch. now i dont know exactly where it is on a s13 but just look up the auto manual swap on a s13 and they usually cover the reverse lights for the ka harness.

[CDub7]

yeah all that is good i found the harness and the plug threw a wire across the switch reverse lights came on but i cant fiond the damn plug on the transmission for the reverse!!!! if worse came to worse ill just throw in a manual switch but if anyone can please help locating the reverse on the transmission let me know asap!!!

[HxC_Nismo]

theres 2 sensors that bolt in on the starter side of the rb25 trans, take an ohm meter and put it in reverse and check for continuity when the transmission is in reverse and the one that has continuity is the reverse switch but it should have no continuity when the trans is taken out of reverse.

[CDub7]

yeah i thought i was chasing my tail but for now i got it on a push button but i saw those 2 sockets today but they boith had plugs connected in to them mhmmmm. . . . ill check when im workin on it again thanks man

[SLAYTER]

Had my done by Gary at Syko. 89 S13 SOHC Cluster, didn't read at all, DOHC cluster swap not re-calibrated, read but was way off / below.

Plugged up the ConZult and ran Nissan Datascan on it, and it read fine from the ECU.

Going to get a DOHC re-calib to work both speedo and tach.

Thought id throw in

[SLAYTER]

I wanted to post a follow-up to this for documentation.

As far as my Speedo went what I did was...

Put in a Z32 Non-Turbo Speed-SensorTook a J30 Speedo, and it read dead on with my ConZult(the speedo required quite a bit of fabrication to fit correctly, but works just fine)

For the Tach I just used the J30 as well, it also reads dead on also utilized my ConZult to confirm.

Pictures... J30 Speedo and Tach installed in S13 SOHC Cluster Housing, S13 Stock gauges are below the housing for comparison

[EVILS14]

nothin works on mine but the gas and the temp gauge

[Fibre guy]

Hey Slayter, what is the mph to rpm equation on the back of your j30 speedo?The 240's and I30's is 60MPH=1024RPM.

[SLAYTER]

I'd have to take them back out to check, i'll make note to check when I pull them back out, may be a week or two, but i'll post here once i've done it.(I have to take them back out to change out bulbs)

[flatrate]

my speedo works and seems to be fairly accurate never checked it, but its close

i have a 98 S14 that was originally an Auto

Tachs very accurate as well i just adjust the potentiameter and compared it agaisnt another Tach i hooked up for referance

I did the swap and the wiring

[jrb92se]

my speedo reads 50% of my actual speed powerfc commander read the same in kph as speedo

they told me they couldnt get the dakota box to work properly

my tach doesnt work

fever racing hooked it up for "free" when they did my a/c

i checked out lsauto, but how do i go about ordering from them should i just email the them? there no shopping cart or order form link on their website

[DeformityX]

The red gear is the stock rb25 gear isn't it?

So you just used a usdm z32 vss and moved the gear to the it? S13 or S14?

Yes this works for the RB25 transmission. I did this and used a GPS to verify my speed, I also used two different cars to verify the GPS's accuracy and I'd say it was give or take 3mph at most... Anyway, Swap the gears(Using the RB25 VSS' gear on the usdm n/a 300zx VSS, simple, all you need is some snap ring pliers), and youll have to also swap the insert or collar inside the connectors, youll see what im talking about when you get the new connector next to your old one, but its easy and it works. Edit: Forgot to say, Yes this is for s13s, however i imagine as long as you still have an RB25 transmission, itll work for an s14 as well. Can anyone verify or test this on an s14??And i dont know if the year matters for this, but the VSS i used was for a 94 n/a 300zx if i remember correctly
Modified by DeformityX at 10:03 AM 12/7/2009