Tic Toc Tach Accuracy
- Thread starter dfrazz
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The original Tic-Toc-Tach had resistors and capacitors which had +/- 20% tolerance and old style germanium junction transistors and volt meter (calibrated to read RPM) of the moving coil design and a +/- 10% accuracy......which accounts for the marginal overall accuracy. The new upgrades that use IC chips are much better but subject to the same meter design......JMO......
BOB RENTON
Keep in mind...
The OE tic/toc tach is not compatible with any type of electronic ignition system, only works correct with the analog OE ignition system.
The tach may register RPMs but it will not be accurate.
Just my $0.02...
The OE tic/toc tach is not compatible with any type of electronic ignition system, only works correct with the analog OE ignition system.
The tach may register RPMs but it will not be accurate.
Just my $0.02...
In my experience the Tic Toc Tac in my '70 GTX was actually very close to being correct until hitting the 5,000 RPM mark....then it went on it's own journey. 
Yes....seat of the pants experience side-by-side with another known tachometer.
Yes....seat of the pants experience side-by-side with another known tachometer.
Contact rt-eng.com and see if their tach conversion module will work. it has a built-in calibration at 1,000 and 4,000 RPM.
Mine doesn’t like my DC ignition and sweeps high under load. I know I need to upgrade the tach board but forgot who does them? Maybe RTS or @SkatpakKeep in mind...
The OE tic/toc tach is not compatible with any type of electronic ignition system, only works correct with the analog OE ignition system.
The tach may register RPMs but it will not be accurate.
Just my $0.02...
Good question..
In my 70RR with electronic ignition I installed a tach from Red Line Guages, basically a VDO inside but with a rescreened front to match the other Mopar guages. The VDO works fine with MSD and Mopar ignitions. Note that Red Line is local to me in SoCal and they do the custom guage works for many of the high end builders like Pure Vision, Julias Restorations. IMHO.. The best guys for guages, if U contact them talk to Shannon. Here is a link to their site.
Redline Gauge Works
Redline Gauge Works is a full service automotive instrument restoration shop for classics, hotrod, street rod and muscle car instrument panels. Servicing vehicles from the mid 20's to mid 80's!
www.redlinegaugeworks.com
Just my $0.02...
Thanks brotherGood question..
In my 70RR with electronic ignition I installed a tach from Red Line Guages, basically a VDO inside but with a rescreened front to match the other Mopar guages. The VDO works fine with MSD and Mopar ignitions. Note that Red Line is local to me in SoCal and they do the custom guage works for many of the high end builders like Pure Vision, Julias Restorations. IMHO.. The best guys for guages, if U contact them talk to Shannon. Here is a link to their site.
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Just my $0.02...
Thanks Bill
