I am considering setting up a triple gauge pod under the hood for tuning, and diagnostics. I want a vacuum gauge, tach, and oil pressure gauge in the pod. I am also considering a permanent fuel pressure gauge inline near the carb.

Will adding extra gauges to the same senders cause them to read incorrectly?
example, 2 oil pressure gauges on the same sender, or 2 tachs on the same feed.

 

Two electric temp gauges on the same sender, both reading at the same time, will make the gauges read wrong.

On the other hand, since you can't read both gauges at the same time, you could put the gauge under the hood on a switch that would disconnect the circuit to the gauge on the dash and complete the circuit path to the gauge under the hood.

That or, you would have to install a separate sender for both gauges for both to read at the same time.


As far as the tachs go, they aren't running off of a sender so both should work.

 

Thanks for the info. That is what I was thinking for the gauge on a sensor would happen.
I will just add a switch for that.

Thinking about something like these on the inner passenger fender. would be easy to add a switch into the base.

 

Just like the previous post said it will be complicated. One other thing the electrical signal from the senders will not match the gauges input requirement.
If you had the exact same gauges and wanted to use 1 sender then you could obtain marine senders that are used on boats with dual station controls.
The easiest way would be to use mechanical style gauges.

 

Why not use manual type oil forget the tach and just a vacuum ga.
I'm just using a mounted vacuum ga for carb tuning. An a in cab dash mount fuel psi electric gauge from an aircraft 0-15 psi
I do have a hand held tach/dwell meter I can use if needed.
Orich


And a fuel regular for adjusting psi monitor in cab 6 psi

 

Orich, what is the canister for- the one that is plumbed into the valve cover?

 

Aw that's what is called a catch can. It keeps harmful vapors from going back into your engine intake vacuum. Has a drain on the bottom. This keep the intake runners clean and not getting coated any nasty built up.

Even newer vehicles still have this problem with coating the runners.
Orich

 

I am not hard set on anything yet. I am even considering building a tune box that has the gauges in it that I can just plug into the senders and a vacuum port. I could even mount my dwell meter into it. This way I can just unplug it and put it away when not tuning.

 

I think being able to remove the under hood guage set is a good idea. Its a much tougher environment under hood as compared to in the cab. Use a 3 way switch fir electric sending units and the tach.

 

If you have the "round top" oil sender it may be compatible with the after market gauge, I am not sure about your temperature sender. You will have to experiment. As I posted before you will not be able to operate both sets of gauges with the senders at the same time.
If the senders are not compatible with the gauges there is usually another threaded hole in the manifold or the thermostat housing. As for the oil sender I have remote mounted the senders with a high pressure stainless flex hose from a Mercruiser hydraulic power trim on the fender well which will provide the ground.