Hello all.. I got some new toys for the Plymouth this X-mas. Sooo along with the new toys comes new questions! One of the things I got was an electric fuel pump.. The model I got was a Holley Red 12-801-1. It is a 97 gph (free flow) and 65 gph under 5 psi pump. I chose this model because I can run it without having to run a fuel regulator (supposedly). Correct? The pump will be feeding my new Fenton intake with two Carter Ball and Ball carbs. Where do I mount this thing in accordance to the fuel tank? It is not feesable to run this pump next to the tank for it will interfere with the rear suspension. My next option is to run it on the other side of the rear suspension closer to the front of the car and mount it on the frame rail. Is this too far from the fuel tank? The instructions for this pump say that it is a pusher type pump so it needs to be gravity fed in order to get its supply. Did I get the wrong kind of pump for this application? Thanks any help is appreciated. Justin
Mount it so that the run from the tank will siphon: ie: mount the pump lower than the tank. Once there is a siphon, the pump will be fine as it won't have to pull from the tank. FWIW, intank pumps from a TBI setup will wirk fine with a carby, though a pressure reg. would help (16 psi).
You want the pump at or below the fuel level in the tank for best results...and as close to the tank as you can get it. Also, if you watch your fuel pressure, you'll find that adding a regulator is probably a wise idea. I messed around with my fuel system this past Summer getting it right, and you'd be surprised at how much the pressure jumps around if you read it with a gauge between the pump and carb. Adding a regulator delivers a smooth, constant pressure reading between the regulator and the carb...much easier on the needle and seat. (Regulators work well closer to the carb, but it's not that critical. Mine is mounted on the firewall and works well there. Just make it accessable if you can for easier service down the line.)
Okay this is what I am looking at thus far. Included is a pic of the ch***is of the car. The tank at that corner is 9-10 inches down from the bottom of the frame rail. The fuel line is in that lower corner, drivers side of the car. I cannot put the pump directly off of the tank because of the rear axle. My next option is down the frame rail on the inside of the frame rail almost across from where the mount for the rear leaf spring is. This is a good location cuz it is where the floor pan dips up for the trunk so I can mount the pump higher so it is not exposed to the ground. Also it will not interfere with the brake lines. Now is this location to far from the tank? If it is mounted there the pump will be at an almost if not lower location than the tank is now. Ahhhh I think that is all I have at the moment.. Thanks as usual Justin
That looks like it will work fine. I agree with Mr Hack, it needs to be at or below the fuel level of the tank. I know this is dangerous, but I agree with him on another point, the fuel regulator. Personally, I would stay away from the chrome circular style that you can get from Mr. Gasket. I bought 2 faulty ones this summer. I know of 5 that came back to the warehouse as faulty. I believe my defect rate on them is about 65%. I would go with the Holley low pressure regulator part number 12-804. It has a 3/8 pipe inlet on the bottom and 2 3/8 pipe outlets on each side. It is adjustable from 1-4 psi. It should be what you are looking for. ...and good luck with that fuel pump. You might think about a spare.
...and good luck with that fuel pump. You might think about a spare. [/ QUOTE ] Ah is this not a good pump? Should I look into others? Thanks on the Holley Reg parts number. Justin
I had a new one of those holley red pumps I was gonna use. lasted 10 seconds. Replaced it with a another used one I had. That one had the pressure byp*** get jammed up and flooded the carbs on the first shot. Tried another new one, damn thing didn't even work. I only use stewart warner fuel pumps now.
Stewart warner 240. They don't make them anymore, but as far as I'm concerned, they are the best electric fuel pump ever made.
I'm using a basic Carter pump that generates about 7-9psi into a Holley low pressure regulator which dials it down to about 4.5 to 5psi...works out well for a carbureted engine that doesn't need a billion GPH to run!
[ QUOTE ] ...and good luck with that fuel pump. You might think about a spare. [/ QUOTE ] Ah is this not a good pump? Should I look into others? Thanks on the Holley Reg parts number. Justin [/ QUOTE ] uum... yeah. It seams like they have BIC (the lighter company) make them. Use it for a little while then throw it away. Junk. The blue pumps are worse. 1 in 50 will last forever... most get 6 months average... I can't recommend a good one, but take the guys advice on SW pumps. (Carter too!!)
hammer, Where do you plan to run the fuel line from the tank to the pump? If you run it along the inside of the frame (where the frame kicks up), you could have priming problems. Try to keep that section of fuel line as level as possible.
I'm running a Holley Red pump mounted on the frame almost exactly like you show in your diagram. No probs so far!
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