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I have 3 tachs in 3 cars, and two of the cars I can check the calibration of
the tachs with the Haltech EFI in them, it has a tach display amongst many
parameters displayed on the fuel mapping pages. I have found that the VDO is
more accurate than my Autometer Monster tach. I have not noticed a
temperature variable but I haven't really looked for one either. The VDO has
always read within a needle's width of the rpm that is displayed on my
laptop where the Autometer is off like 150 rpm at 1,000 but reduces the
inaccuracy to a needle's width at 2,000.
I "think" I still have the receipt from buying my VDO like 22 years ago. Its
been in two cars now. Plus I am going to go to a hobby shop and find some
aerosol spray paint to fix the lighting differences between the VDO and
stock instruments in my notch. I believe the bulbs don't get hot enough to
discolour the translucent green paint that will be sprayed on them. At least
its an idea that I think has merit.
Tom
'64 Notch, 2.5L T4, EFI
(soon to be featured in VW Trends)
'69 Bug 2.1L Berg 5, EFI
(soon to have a '51 body)
'68 Ghia, 12.28 @ 106
(with a 1776)
'78 'Cabriolet, custody while sis is gone
'85 MR2, appliance grade
'98 Dakota
3 tree squirrels
Carport just about enclosed
> I need observations from the people who have the better aftermarket Tach's
> in thier cars.
>
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