aftermarket gauge questions

[Jorgen Karlsson]

> 1) Is anyone aware of an aftermarket tachometer (with shift lite) that
> works with a 5cyl?  The VDO extreme tach will do this...but it's price is
> WAY up there! Anyother options? I'm 6'4" and with my small aftermarket
> steering wheel...I can't see the tach or speedometer in key areas!

VDO should have a simpler version with a shift light but I am not sure, you
could use a simpler VDO tacho and a MSD or autometer shift light. Just use a
suitable RPM pill, 3700rpm should be ok if you use a V8 model.

Or you can of course get an Autometer Gauge, they can calibrate it for five
cylinders at the factory. Maybe you can get one of these from Summit too,
this should be cheaper.


> 2) What PSI would be appropriate for a fuel gauge..they are availible in
> 0-15, 0-30, and 0-100 PSI. I assume the stock system on the 89 90q doesn't
> put out 100psi, but I really don't know...any help?

I don't see many reasons to see the fuel pressure when you run CIS, fuel
pressre gauges are almost only needed on a tuned turbo car where you arent
sure of the capacity of the fuel pump. Or when you do the initial tuning of
the car. But the 0-100psi range is what is needed on all injected cars
except TBI injection.

> 3) In mounting an airfuel mixture gauge, I understand they use a 5 wire O2
> sensor...will it be necessary to add a second O2 port to the exhaust
> manifold, or does it replace the stock unit...I assume if it replaces the
> stock unit then the stock system is able to read off of it?

Almost all meters will work fine with the stock sensor, I recommend
autometer here too.

> 4) Seeing as I've already got Coolant temp, Oil Temp, Oil Pressure and a
> Voltmeter...are there any other gauges that would be particularly helpful
> in seeing more of what's going on with my car?

If your oil pressure meter is electronic I would get a mechanical one
instead, the sensors are usually very unlinear on the electronic ones. I
trust Autometers electronic ones but if there is a choice I use a mechanical
unit instead.

A EGT meter is very cool, Autometer here too, many others aren't calibrated
for ambient temp. That includes VDO... Autometer also has a lot faster
response then VDO, even with the same probe!


Jorgen Karlsson
Gothenburg, Sweden