I am looking to change my oil pressure gauge and volt gauge in my 87 . Do I have to
replace the oil sending unit with the new gauge sender?any particular brands
work?

if You're going to change Gauges, Why not use Mechanical ?

All I want is to change the gauges to a round design

Pretty sure if you use an aftermarket electric gauge, you can use existing wires. You prob have to use the sensor that comes with the gauge. Most are calibrated together. If you go to a mechanical gauge, which will look exactly the same, you dont need any wiring. You do have to change the engine sensor. Then you just run the 1/8" tubing (brass or plastic) between the two. Mechanical eliminates any kind of false readings and gives you instant real pressure reading without having to trust the electronics.

There are aftermarket gauges that can work with the stock oil pressure sender. The signal is 0-90 Ohms. (0 is zero, 90 Ohms is about 80 PSI)

I personally would not want a mechanical oil pressure gauge. But that's just me.

quote Originally posted by Blacktree: There are aftermarket gauges that can work with the stock oil pressure sender. The signal is 0-90 Ohms. (0 is zero, 90 Ohms is about 80 PSI) I personally would not want a mechanical oil pressure gauge. But that's just me.

Which one's?

------------------
Notchie to Fast Back Conversion

After Market Steering Wheel Conversion

quote Originally posted by Blacktree: There are aftermarket gauges that can work with the stock oil pressure sender. The signal is 0-90 Ohms. (0 is zero, 90 Ohms is about 80 PSI) I personally would not want a mechanical oil pressure gauge. But that's just me.

Yes, its just personal choice. I just think mechanical one is pretty much foolproof/ reliable. Electric oil gauge is just slightly better than an idiot lite.

[This message has been edited by rogergarrison (edited 11-21-2016).]

I am looking at the bosch electronic oil pressure gauge comes with its own sender hope it can fit
to the fiero oil sending unit connector . Also i am trying to make my own 2 gauge pod that
will be flush instead being above dash.

I have a Bosch electronic gauge with a 2 pin connector the fiero has a 3 pin connector for its sending unit.
has anyone installed one of these gauges? it comes with its own sending unit. I can retain
my warning light with a T-connector.

quote Originally posted by Atlanta1: I have a Bosch electronic gauge with a 2 pin connector the fiero has a 3 pin connector for its sending unit. has anyone installed one of these gauges? it comes with its own sending unit. I can retain my warning light with a T-connector.

------------------
My World of Wheels Winners (Click on links below)

3.4L Supercharged 87 GT and Super Duty 4 Indy #163

[This message has been edited by fierosound (edited 12-14-2016).]

Guys I just pulled my oil and volt gauge out and it is tied to one plug that fits for both
how can I separate into two new gauges like a new bosch and oil gauge?

Any electrical gurus out there know about the wiring for the fiero volt and oil pressure gauge on the dash?
there are five wires that are tied into a plug.