use of a relay places less electrical load (amps) on the original cars ignition circuit, its also common to wire in an oil pressure safety switch that cuts off engine fuel supply if the oil pressure is not above 4-5 psi
- grumpyvette Said:
would not adding a relay and the more complex wiring to feed the device and relay far out cost the simple use of a marginally heavier gauge wire that would eliminate the need for the relays use?
[quote="george88gta"]Absolutely. For a hot rodder, just going with a larger wire certainly would be less expensive and simpler. It's probably only $.03 -.05 per foot increase.
Just find a switched source at the main fuse block ( making sure that the switched source can handle the amps) and you are good to go. Down side is that as long as the ignition is in the run position, the pump will run.
If you add in the "rollover" or "kill"switch that mfgs are required to use, then the relay is the way to go. They can tie in a few different ways to de-energize the relay in case of an accident, etc.[/quote]
https://www.amazon.com/EtoparsTM-Ve...lay+with+plug+and+wires&qid=1577740516&sr=8-6
several options
https://documents.holley.com/199r9680-1rev.pdf
https://www.jegs.com/i/Holley/510/12-810/10002/-1
http://garage.grumpysperformance.co...urrent-flow-grounds-and-more.3504/#post-33363
http://garage.grumpysperformance.com/index.php?threads/how-big-a-fuel-pump-do-you-need.1939/
http://garage.grumpysperformance.com/index.php?threads/setting-up-your-fuel-system.211/
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