Tach for a magneto

Im in the process of restoring an original B Altered drag truck. I have all of the origional pieces except for the Tachometer. The truck runs a 401 Nailhead with a magneto.
The original builder said he used a Sun tach with the battery pack sender. I have'nt had much luck finding one of these.
Does anyone make a repop? My Mag does not have a port for a mechanical cable. Is there such a thing as running one off of the injection pump? Any Ideas or suggestions are greatly appreciated.

 

Hey this project sounds fantastic, how about some pictures of your truck? I also run a B/A Fiat and I am switching to a magneto. I am a little confused as to what to do about my tach. Hopefully someone has the answer.

 

I just went thru the same crap for my slingshot. I used a Mooneyes tach (cheapie) and the MSD magneto signal converter about $60. Works fine.

 

Does this work with the old Vertex mag? If so where do you wire it in?

 

i posted a similiar question. i had a vertex magneto for a small block chevy. it cost me 65 bucks to change the base over to a 354 chrysler hemi. while that was being done, it cost me an additional $125 to add a tach drive in the new base.
there are adapters to convert the signal, but you need to shield them or else you get erradic readings.
you can also drive a mechanical tach off the crank with this 2:1 reduction

http://www.pegasusautoracing.com/productdetails.asp?RecID=254

 

try that link again

http://www.pegasusautoracing.com/productdetails.asp?RecID=254

 

vertex used ta make a tach converter/signal box fer mags, as well as mallory n the above stated msd. You kin always try n contact Joe Hunt magnetos (www.huntmagnetos.com) to see if they kin hep ya or try vertex (www.taylorvertex.com) fer sum hep.

 

Thanks for all the help guys! Great info.

Chuch Key/ here is a pic. for ya.

 

would a tach for a diesel that runs off a signal off the fly wheel work

 

Keep checking ebay. You are looking for a Sun Model EB37A Tach Transmitter that works with 8 cyl engines using a Vertex mag. They do show up on ebay from time to time.

 

I dig that truck, good luck with your project. There were several trucks like that running at the New England strips.

 

I used to run an Autometer that hooked up to the mag without an adapter. This was in the early 80"s. I haven't checked to see if they're still available.

 

I'm running an AutoMeter memory tach with a Vertex mag.

I tried one of those signal converter boxes to run a standard ignition tach with a mag. Ya' have to run suppression wires, which I changed to, and I never got a good reading.

The Vertex mag folks tell ya' to run solid core wires, which I already had.

So, either "STEP-UP" for the correct electric mag tach or really "STEP-UP HIGHER" and run a mechanical tach.

 

Just happen to remember.

I have a Vertex Mag Auto Meter tach for sale.

BUT ............... it's for the Vertex Mag with the external coil.