Custom Fuel pump switch

[n0de]

I know that this post is probably going to sound dumb, but I am looking for information on wiring up two parallel fuel pumps so that if one fails it will then shut off the other pump, or at least alert me that a pump has failed. If this is already a common setup, could someone point me in the right direction? I have no idea what words to use in order to search for this.

 

[T is for TURBO]

Even easier

Walbro 450lph

I personally would rather just have one big ass pump. That way if it fails, the car stops, and it follows the motto, "keep it simple, stupid"

 

[LandSpeed-DSM]

I am also one to advocate a big single. Sharing a common overflow protector (fuse/breaker) could do it, but it would depend on how one fails.

For what you would want to do, you would be spending so much money on flow sensors/shunt trips, etc. You'd have been better off just getting a big single to begin with.

Then add in all the hardware to plumb two pumps in parallel, two relays for power to both using the stock trigger, etc. and you come out way ahead.

What single you want depends on your plans.

If you still insist on two pumps, start reading up on standard industrial control schemes.

 

[n0de]

Seems like im in for a bit of a ride. Ultimately I need to have a fuel system to support around 700whp. I was lucky enough to snag a used Frontline fab fuel cell w/the exact modifications i wanted. It has 2 -8an bulkheads sumped, and a -6 return. I got it for a really decent price, so i went with it.

I can use the stock hanger location and just cap off the tanks feed bulkheads, then use the walbro 450. Had i of kept the stock tank (2g awd tank) would the 450 even fit? There isnt much room to play with there.

I also forgot to mention that i bought this car as a rolling chassis, it didn't come with stock fuel lines (PO removed them), but the PO did include a STM tank to rail fuel line kit, -8an feed -6 return.. so there wouldn't be much more cost associated with just getting a bit more -8 and running 2 pumps in parallel. My only issue is the wiring of the pumps to make it safe in case of failure.

 

[LandSpeed-DSM]

If you already have a sumped FF tank, I would not even bother with an in-tank pump.

Read up on the Magnafuel MP-4303 vs. the competitors. The only one at that capacity that both self-primes and is rated for continuous duty.

Here is a quick spreadsheet I put together:
https://docs.google.com/spreadsheet/ccc?key=0Ahi5eTgzfWg_dHh3RGpienAyYXRrNUF3c2Y0cEwyNlE&usp=sharing

It's quieter than the Bosch 044s I ran on the last setup. You can hear me prime the pump before firing, don't mind the massive vacuum leak.. nothing bolted up to the throttle body so it's just being held on with one nut for testing:
[ame=http://www.youtube.com/watch?v=PY5xguRtyrI]First Start HX52 DSM - 2013 - YouTube[/ame]

 

[n0de]

Christ the car is loud. My computers sub-woofer was having a field day. And dude, priming the pump... i thought you were activating the car lift.

Good lord that pump can move some fuel.

On a side note, would you happen to be in the suburbs, or near naperville?

 

[LandSpeed-DSM]

Ha, yea she makes some noise with that 4" trumpet going through the hood.

Pump noise is really not that bad for what it will move, even at lower voltage and high pressure. Admittedly the camera is actually pretty far away but the garage echo amplifies it a bit.

All the neighbors came over to check that out after we shut down

For anti-theft purposes.. I won't say where or which direction but yes the car is kept out in one of the suburbs It actually moves around a lot.