I need to have a working speedometer in my car (rules don't say it has to be accurate).

Does the speedometer work off of Hertz? I know it goes through the PCM, but I don't have one of those anymore, so that's not an option. My transmission doesn't have any provisions for a speedo either, so I was planning on using one of the old ABS sensors in the front hubs for a Hertz signal..

He who helps most gets a free T-Shirt

 

I'd say the easiest way to get a close speedo signal would be to use a DRAC out of an older S series truck. It is a small box that converts the signal from a toothed wheel (your ABS sensor) to a signal that the speedo can use. There are formulas on the internet on how to calculate corrections. It took me about 3 tries to get the speedo within 1 mph.

1. Get a DRAC (I have one if you need it) and install a set of DIP switches where the jumpers go. This will make it fast and easy to calibrate the speedo.

2. Run a set of wires (twist them together, about 1 twist per inch, for outside noise rejection) to the front of the car. They need to be inside where the DRAC will mount (passenger kick is a good place so you can catch the speedo wire to the speedo from the PCM)

3. Hook up your ground and switched ignition and the 2 signal wires from the ABS sensor. Hook up the speedo wire and go out and calibrate.

Cheap and easy.

Ryan

 

Now we're getting somewhere

Yes, I want that DRAC box that you have. I don't care about accuracy at all, it just needs to work. does the DRAC box have pin jumpers, or is it a solder type deal?

 

They solder in. That is why you go to Radio Shack and buy a set of DIP switches and solder them in. That way you can just flip the switch on or off to speed the calibration.

Ryan

 

This is a cool way of getting it done.
http://www.nordskogperformance.net/p.../gps/index.htm

 

Here is the calculator. Simply put in the number of teeth your reluctor ring has and put the gear ratio as 1:1 since you are not going through the gears and that should get the jumper settings pretty close.

http://www.philter.com:81/cgi-bin/drac.pl

Ryan

 

Jeff, thanks but too pricey.

Ryan, how much for your DRAC, and would you solder the dip switches in?

I need it asap
thanks!
...Brady

 

I can solder the DIP switches in. Let me go out in the garage and find a DRAC and I'll let you know when I can have it on the way. How does $20 shipped for the DRAC with the switches in it sound?

Ryan

 

sounds great, $20 and a t-shirt. PM me your address and shirt size. You want paypal or??? I just have to have it by like march 7th.

thanks a TON
...Brady