US Shift rpm source

[turbotim2]

I know this is going to be a stretch but...

I am running a Holley Sniper first gen, Hyperspark ignition, coil and distributor and installing a Quick 4 controller for the 4R70W. The Q4 is looking for a tach signal and there is a tachometer out lead from the Sniper ecu. Seems straight forward, right?
When I installed the Sniper originally, I used this lead to drive an aftermarket tachometer per the instructions. It didn't work so I reached out to Holley support and they said it's not a tachometer output lead despite the clear indication in the manual.
So... is anyone running this combo?

 

[Broncobowsher]

Do you have a working aftermarket tach now? You say you tried it, so it sounds like you have one. Did you ever find a signal for it?

I ran an older version of the controller, it never needed a tach signal. It just back calculated it off output shaft speed and gear ratio.

 

[turbotim2]

I tried it on my tach and it didn't work. That's why I had contacted support and they said that's not what that wire is for but wouldn't say what it was for, lol!

I have since removed the tach since the sniper display shows rpm.

I will double check and see if it's a required connection and if not, just leave it.

 

[SLOWnEASY]

I wonder if you can wire it old school and connect to the negative terminal on the ignition coil for your tach signal.

 

[Broncobowsher]

I wonder if you can wire it old school and connect to the negative terminal on the ignition coil for your tach signal.

I can't remember if the hyper spark is a regular ignition module or an CD style module.

 

[turbotim2]

Just heard back from Holley, they say that I can use that wire for tach signal.

 

[nvrstuk]

Just heard back from Holley, they say that I can use that wire for tach signal.

What is "that wire" that Holley said you could use?

 

[1973bronco1973]

Q4 can get tach signal off of coil- (might need resistor) if it is not triggered from an ignition box(msd 6a etc). Otherwise it says to use tach signal from the ignition box that you use.

 

[turbotim2]

What is "that wire" that Holley said you could use?

The wire mentioned in post 1 and 3.

 

[904Bronco]

The wire mentioned in post 1 and 3.

Maybe he is asking for a wire color...?

 

[turbotim2]

The dark brown one labeled "Tach output - used to drive an aftermarket tachometer" in the manual.