electric fuel pump wireup help

[vick79]

Hi guys,

i picked up a low pressure electric fuel pump to fix some vapor locking issues on my 440. Airtex ES8016 (2.5-4psi). Mechanical fuel pump is left in place.

what is the best mounting location? Do i need to add an oil pressure switch? or can i safely wire this directly to iginition power?

[Rolling_Thunder]

you can hook it directly to ign hot - run an inline fuse though. The other wire can be grounded to the nearest frame rail.   No oil pressure gauge needed IMO.  You can section it in to the rubber line between the shock mountings over the axle. I ran a similar set up on a 66 VIP and never had a problem. You can also run it on a frame rail forward of the axle if you're more comfortable with that location.

[vick79]

you can hook it directly to ign hot - run an inline fuse though. The other wire can be grounded to the nearest frame rail.   No oil pressure gauge needed IMO.  You can section it in to the rubber line between the shock mountings over the axle. I ran a similar set up on a 66 VIP and never had a problem. You can also run it on a frame rail forward of the axle if you're more comfortable with that location.

good info. working on it tonight so this will help. Would i be correct to assume the car will still run fine with the mechanical pump even if the electric pump isnt hooked up to a power source yet?

[John_Kunkel]

Some electric pumps allow the engine-mounted pump to pull through (free flow) and some don't. Not sure if the Airtex does.

[Fred]

I've got a Facet Solid State Cubed Pump 12v   ACA FFP310 which I use as a priming pump only. It's a pull through free flow pump.

[vick79]

Some electric pumps allow the engine-mounted pump to pull through (free flow) and some don't. Not sure if the Airtex does.

I did some testing driving around with pump unhooked, looks like this airtex model allows flow thru, operation was unaffected. I might add a switch so this pump is only used to prime the system before starting.

I mounted my bracket on the exhaust hangar bolt, cut the tank side fuel line and inserted this pump input directly to the tank. Airtex recommended the output side be angled a bit higher than inlet.

Where exactly  did you guys hook this into for +12V? I could not find a ignition +12V source on the starter relay so  I wired it into the ballast resistor, along with the electric choke. Its powered only on Acc2 and when engine is running. Will that work long term?

[Fred]

I've got mine hooked up to the battery in the fuse box along with an in line fuse and switch. Woks great.

[vick79]

I've got mine hooked up to the battery in the fuse box along with an in line fuse and switch. Woks great.

that sounds like a much better idea

[Fred]

I've got mine hooked up to the battery in the fuse box along with an in line fuse and switch. Woks great.

that sounds like a much better idea

[Nacho-RT74]

not a good idea run any device straight from the batt on cars with ammeter

[myk]

How loud is your fuel pump?  Mine's louder than the 440 it's feeding...

[Fred]

not a good idea run any device straight from the batt on cars with ammeter

It's only a priming pump Nacho and only runs for about 30 seconds. Then it's switched off.
Another option would be to run it off accessories from the fuse box.

[Fred]

How loud is your fuel pump?  Mine's louder than the 440 it's feeding...

Mine sounds like a jack hammer    But it only runs for 30 seconds.
Just kidding! 

[myk]

Hmm..what's with the "priming only" setups?  I never had any trouble priming with a mechanical pump...

[Nacho-RT74]

not a good idea run any device straight from the batt on cars with ammeter

It's only a priming pump Nacho and only runs for about 30 seconds. Then it's switched off.
Another option would be to run it off accessories from the fuse box.

oh, ok...

[vick79]

How loud is your fuel pump?  Mine's louder than the 440 it's feeding...

very quiet since its low psi pump, just a slight sound with engine off.

need to prime the lines because im having vapor lock issues when its run for a while and parked on a hot day here in 100F socal