Anyone on here ever convert thier transmission to have an electronic output? I am considering doing this to a TII transmission. Any ideas? The more oem like the better.

 

Yup, I've done it and it's OEM as ****.

The VSS from a FD is a direct bolt in after you swap the FC driven gear onto it.
It's been driving the speedo in my Miata cluster and it's dead on the money, accuracy-wise.

The unit on the left is the FD part, you can see the size difference of the gears pretty well:


Although the mounting flanges look different, the one required mounting hole is identical and no mods are necessary to fit the FD piece.

 

what?! clokker you holding back son!
this will be great for my rx8 6 speed vert.

but what for the gauge side? just a stock miata?

i've been told/researched that an rx7 abs hub will pulse 4 times a rev, and you can get a honda tach of a certain year that fits the FC layout and 4 pulse per rev as well.

what are you running? a miata cluster in an fc?

 

I have a Miata (NB) gauge cluster with the electronic speedo.
Connected to the FD VSS with the FC gear swapped on, it is dead accurate.

I have done it but credit for the initial idea goes to Ben (Rotary Evolution), who not only spotted the similarities between the parts but sent me a FD VSS to experiment upon.

 

does it look like the speedo would come out of the cluster, or is the hole cluster worth swapping for the trouble? got a pic?

 

The fuel/speedo/tach are stock Miata, oil pressure and water temp are VDO with Miata dials and needles.
Everything is functional.

 

clokker- just curious why the swap? just to have something different?

 

I thought the layout of the stock cluster was awful, this one appeals to my sensibilities more.

 

it can't be plug and play.. care to share for me to copy, this is great, including that rx8 wheel

 

So did the epoxy hold up well? How many pulse per mile or drive shaft rev is it?

 

No, it's not p-n-p. The electrical part is very straightforward, not difficult at all, melding the two clusters together is the tricky bit.
I detailed my efforts here.

If you refer to the epoxy holding the gear on the VSS, yeah, nearly fours years on and it's fine.
If I ever knew the tech specs, I've forgotten them now but I do have a suspicion that Mazda used a similar (if not identical) VSS on lots of models, which means lots of tachs probably work with it.

When I began the swap I assumed some sort of correction might be necessary- typically, putting resistors in the circuit or using a Dakota Digital box- but this combo proved dead accurate as is.
Bear in mind that other factors are in play also.
Specifically, your diff ratio and wheel size, either/both of which can throw the speed readings off.

 

i just looked and the Rx7 goes to the electric VSS in 1993. the miata uses a cable until 99, and then switches to a VSS like the FD. the Rx8 and 06 miata use the ABS wheel speed sensors, so have nothing in the transmission.

the protege has a VSS like the FD/NB but i doubt it would fit.

 

duh, the rx8 trans will have no mount for this VSS, well i feel like my parachute just failed to open. fug.

i actually heard that i can swap the 6 speed miata trans tail housings onto the rx8 and it will add provisions for a speedo gear. car is down so might as well go crazy with fixings

 

Worse comes worse,you can just plug up the Trans cable/sensor hole and run a GPS Speedo.
I got one that is about match box size..works good too!

 

there is a box that the hod rod guys use that can drive a cable speedo from a wheel sensor input

 

thats the dakota box, i hear it has a delay


oddly enough my old cable driven speedo is within a MPH or 2 of GPS speed which is amazing considering the rear end, transmission, and tires have all been changed from original sizes

 

No and no, actually.
The Digital Dakota (or is it the other way round?) is digital in and digital out, it won't drive a cable. It's meant to adapt different trannies to your stock- already electronic- speedo.
We had one in the swapped FD and I can't say I noticed any lag.

I have seen the kind of converters you speak of Rob, but don't know any brand names.

 

dakota digital is a brand, one of the products they sell is a digital to cable converter
ECD-100

 

Well thanks, color me corrected.

 

they also sell one to go the other way, and to correct signals etc

 

If someone with a 3d printer made gears for this, that would be GREAT!

 

From what I remember the write up for the 2nd gen Acura integra speedo is on no rotors . Com . The v8 guys do the swap to get signal for the gm transmissions

 

Yeah, that's what I did for my LS swap. Brightness could be dialed in, but looks super stock.

 

Just throwing another option out there which may help people. Since FCs had an ABS option, installing one ABS hub (with the tone ring) and ABS VR sensor onto one spindle provides a very handy speed pulse signal for things like ECU logging.

 

You are the man Aaron for that idea . Now could said hub assembly give signal to say a haltech e6k and run that Acura speedo above . . My speedo is off by like 20mph with my t2 drivetrain and running 205/50/15's on 15x8's