[V8Vairs] Corsa Tach in a V-8

[RHargr8188 at aol.com]

This has been discussed before, but I agree with Craig, I've calibrated my  
tack on the bench using a frequency counter and generator and it tracks the 
RPM  as you would expect. This has been confirmed by others who have 
calibrated  their Corsa tack.  If you are using a HEI system which could have  
(mine does) a high voltage tack signal you should place a 1.2K 1/2 watt  
resistor in series with the tack signal. This higher signal may be the  reason 
some have had problems using a stock tack with the HEI  systems.
 
Doug Hargrove 
 
===================================
Yes, all you have to do is to adjust the potentiometer. I have a  tach
calibration set-up and verified that it is just as accurate when  calibrated
for a V8 as it is when it is calibrated for a 6. The original  design specs
called for a different capacitor on a V8 tach board but in  practice it
doesn't seem to matter. The only catch is you need to start with  a good
tach. I have a recalibrated Corsa tach on my V8 and it's spot  on.
Craig Nicol
66 with 4.2L Olds V8

-----Original  Message-----
From: _v8vairs-bounces at corvair.org_ (mailto:v8vairs-bounces at corvair.org)  
[_mailto:v8vairs-bounces at corvair.org_ (mailto:v8vairs-bounces at corvair.org?) ] 
 On
Behalf Of _paulsiano at aol.com_ (mailto:paulsiano at aol.com) 
Sent: Saturday,  September 18, 2010 5:50 AM
To: V-8 Vairs
Subject: [V8Vairs] Corsa Tach in  a V-8

Can a Corsa tach be calibrated to accurately work with a V-8?   Can it be
done by simply adjusting the potentiometer?   I dimly  recall the addition 
of
a resistor to do the job.

As always,  thanks in advamce.

Paul