[Diy_efi] Gauge/Sensor accuracy?

[EFI Dude]

I guess the partial answer is that since my gauges can
be had for a relatively low price, then it is not too
accurate.  I'm honestly not surprised.

Good point about repeatability, but how do the VDO's
(cockpit series to be specific) and their matching
sensors fare for repeatability?

Most of my gauges are electrical (water temp, oil
pressure, volts, fuel pressure).  Vacuum/boost is
mechanical, though I have a high accuracy boost
gauge that I will hook up for the tests.

BTW, street car, but trying to make 500hp on a S/C'ed
5.0.

Thanks.




-----Original Message-----
From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On
Behalf Of Bruce
Sent: Thursday, June 29, 1995 7:02 PM
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] Gauge/Sensor accuracy?





Good quality guages are $$.
As long as they are repeatable, is what realy matters.
I generally run some reasonably priced guages in the car, and then have a
diagnostic set.   From time to time (each spring), I'll plug things in and
compare notes, or IF I suspect a problem, then again verify them.
   IMO, if you're doing a full out race car, then mechanicals, if for the
street electrical.   The mechanicals when they do fail can be a huge arsed
problem.   So I'd rather not risk em.   They are also expensive to plumb, ie
AN only.
Bruce

----- Original Message -----
From: "EFI Dude" efidude at avn-tech.com
Subject: [Diy_efi] Gauge/Sensor accuracy?
> Have a stumbling problem on my 5.0 EFI, and before I start
> testing and gathering data, I want to make sure my measurement
> tools (VDO aftermarket cockpit-series gauges) are accurate.
> The question is, how accurate are these?  Especially the
> temp and fuel-pressure gauges?  I had seen the sender
> output chart (V-out vs. pressure) for a SW pressure sender
> some time ago (can't find it now), and it was really
> non-linear, and all over the place.  My guess is that the
> gauge is not compensated for this, hence my concern.
> Anyone have any thoughts on this?


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