Competition Tachs & Gauges - KNS Autosport
Competition Tachs & Gauges - KNS Autosport
Competition Tachs & Gauges - KNS Autosport
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Tech Support:<br />
TECHNICAL INFO - Q&A<br />
VOLTMETER VS. AMMETER<br />
A voltmeter measures electrical potential (pressure) in units<br />
called volts that is necessary for current measured in amps (a<br />
quantity) to flow through your electrical system. If there is NO<br />
pressure (volts), there can be NO current flow (amps). This is<br />
analogous to having no oil pressure and, therefore, no oil flow.<br />
You must have one to get the other!<br />
Ammeters were popular when generators and alternators<br />
typically averaged 35-40 amps of output, and vehicle electrical<br />
systems were much less complex. Today, alternators commonly<br />
have output capacities of 100-110 amps with more complex<br />
wiring and higher accessory loads. This makes it more difficult<br />
to install an ammeter. Just as we measure oil pressure rather<br />
than oil flow, we prefer to measure volts rather than amps, so,<br />
the overwhelming choice for performance applications today is<br />
the voltmeter.<br />
Contact our tech support team if you have additional questions<br />
about ammeters or voltmeters.<br />
The bottom-line...an ammeter is NOT an effective solution for<br />
racing applications!<br />
Restorers often prefer to use ammeters if that was the type of<br />
gauge originally in the vehicle.<br />
CONTACT TECH SUPPORT<br />
If you have further questions on Stewart Warner instruments,<br />
please contact our tech support at the following:<br />
<strong>Competition</strong> <strong>Tachs</strong> & <strong>Gauges</strong> and Impact: 866-797-7223<br />
or e-mail techsupp@SW-Performance.com<br />
Other Street Performance Products: 800-676-1837<br />
or e-mail techsupport@StewartWarner.com<br />
www.StewartWarner.com 97
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