Electric fuel pump wiring

pishta said

Fuse each circuit. Also there may be a time where you want fuel pressure without ignition like priming a carb, setting fuel height or to kill fuel pump with ignition on to drain the carb prior to storage or transport. plus it gives the driver 2 more aircraft switches to throw prior to starting...fuel, ignition, start! (could also pump, start, THEN ignition to prime oil pressure prior to starting).

Click to expand...

Starter motor still turns the motor over. Ignition nor fuel pump needs to be on if all you want to do in spin the engine over. I can spin the engine over till I burn the starter up or battery dies. My car has a lot of compression. I would spin the engine over then flip the ignition and fuel on and she fires right up. You can spin the engine over to get oil pressure. Getting oil pressure doesn't require ignition or fuel. So we are still without any reason to have a seperate fuel pump switch. Please understand im all about safety here. So im wanting real life facts why anyone would wire their fuel pump separate from the ignition. And most evryone does. I'm not sure what NHRA/ IHRA says about it. I think its worth a phone call tho.