I ended up watching a video on this same thing, but it wasn’t till after I did the install the first time. Pump has been fine in the hanger now, but I do have a new hanger from QFS that has the pump already installed and it has -6 and -8 lines fittings on it, so I need to drop the tank and get that installed and plumb the AN lines. Having an issue now where it drops fuel pressure when boost comes on due to the tiny stock fuel lines and -6 crossover I used.
@@PeakPerformanceEngineering I feel you. My brand new Walbro just went out and I had to replace it yesterday. Made me think about the future of the fuel. Plan is to do -10 feed all the way to the rail and either -6 or -8 return. I plan to run e85 @ around 650-700hp so I want there to be plenty of fuel
Still stock short block so just wanting it to be around 500whp. Had issue on dyno last summer with fuel pressure dropping due to the tiny stock fuel lines so we could only tune for drivability, couldn’t do power pulls. Once I redo those with 8an lines this fall/winter I’ll get it back on dyno.
Could I wire a boost a pump (fuel pump voltage booster) inline pin 87? Would that boost my fuel pump? And in doing the wiring how you did it doesn’t retain the inertia switch
If I’m imagining it correctly, I think since I’m using the factory power wire to trigger the relay to the pump, that in the case of the inertia switch, it should still be operating as normal. I don’t know if the internal switch interrupts the power or the ground side, but either way I have the factory power and ground connected to that relay, only to be able to deliver higher current from the battery through thicker gauge wiring. As far as the boost a pump I am not sure exactly how to wire it In I haven’t used one of those before, but I think it would be somewhere between the fat pink power wire coming out of the relay to the fuel pump, to pump up the battery voltage to 16 or whatever it does.
So connect the new trigger wire to pump power ...not the original trigger wire... so you will have 2 fuses? The original and the new hotwire one... just making sure thats correct ..i need to do mine
You’ll use the stock power wire for the pump as the trigger wire for the relay. Then from the relay the new fatter 10 gauge wire will actually power the pump. Since we’re adding the relay to trigger the power now, you’ll want that extra fuse on the new power wire in case something ever grounds out.
The stock wiring is pretty small gage, and bigger pumps will need more sustained current to work. The worry is over time the stock wires could fail and not allow enough voltage to the pump, eventually taking out the pump or even melting the stock wiring and causing issues like a short. It’s just a safety precaution, I went with the bigger 525 pump to I wanted to be safe and make sure the pump was able to get all the current it needs to operate at peak performance
Yeah the pump would work for all fox 87-95 at least. If not up to 04. Qfs makes a drop in hanger with the 525 pump too that has -8 and -6 fittings already on it too. That’s what I’m installing next
Qfs has been solid, I’m actually upgrading the hanger/pump to their unit with AN fittings on it here soon so I can run -8,-6 feed and return up to the rails. Other than hearing the pump prime when you key over and the engine not running, I don’t hear it any other time.
That’s the exact pump/hanger I am trying to decide to get for a coyote swap fox body. I see they have a 6an for both feed and return or a 8an and 6an. Do you know why someone would go with the 8an/6an as opposed to both 6an?
@@mrprfct7069 I would def go 8,6 I can only see 6,6 if it was a pretty low hp application like maybe a NA build, but the cost for 8an is pretty much the same as 6an so might as well run 8,6 is my thought. I’m having a problem right now with the stock fuel lines not being able to keep up with the big pump and pressure drops from 60 down to 30s in boost so I have to upgrade the lines to fix that. That small 5/16 feed just ain’t cutting it lol
@@PeakPerformanceEngineeringthank you. 8/6 it is. I plan to stay NA on this coyote using the corvette c5 filter that’s been recommended by many. Apparently this filter will keep the pressure at the sweet spot just under 60psi for the coyote. There are 2 versions of the filter. One with built in 6an fittings and the other with regular nipples.
To get those stainless steel zip ties tight you grab them with needle nose pliers and then rotate the pliers. Gets them super frickin tight
I ended up watching a video on this same thing, but it wasn’t till after I did the install the first time.
Pump has been fine in the hanger now, but I do have a new hanger from QFS that has the pump already installed and it has -6 and -8 lines fittings on it, so I need to drop the tank and get that installed and plumb the AN lines. Having an issue now where it drops fuel pressure when boost comes on due to the tiny stock fuel lines and -6 crossover I used.
@@PeakPerformanceEngineering I feel you. My brand new Walbro just went out and I had to replace it yesterday. Made me think about the future of the fuel. Plan is to do -10 feed all the way to the rail and either -6 or -8 return. I plan to run e85 @ around 650-700hp so I want there to be plenty of fuel
😎 you’re the best !!!
Thanks!
Awesome video!!!! What hp range are you looking to make?? Rwhp??
Still stock short block so just wanting it to be around 500whp. Had issue on dyno last summer with fuel pressure dropping due to the tiny stock fuel lines so we could only tune for drivability, couldn’t do power pulls. Once I redo those with 8an lines this fall/winter I’ll get it back on dyno.
Could I wire a boost a pump (fuel pump voltage booster) inline pin 87? Would that boost my fuel pump? And in doing the wiring how you did it doesn’t retain the inertia switch
If I’m imagining it correctly, I think since I’m using the factory power wire to trigger the relay to the pump, that in the case of the inertia switch, it should still be operating as normal. I don’t know if the internal switch interrupts the power or the ground side, but either way I have the factory power and ground connected to that relay, only to be able to deliver higher current from the battery through thicker gauge wiring.
As far as the boost a pump I am not sure exactly how to wire it In I haven’t used one of those before, but I think it would be somewhere between the fat pink power wire coming out of the relay to the fuel pump, to pump up the battery voltage to 16 or whatever it does.
So connect the new trigger wire to pump power ...not the original trigger wire... so you will have 2 fuses? The original and the new hotwire one... just making sure thats correct ..i need to do mine
You’ll use the stock power wire for the pump as the trigger wire for the relay. Then from the relay the new fatter 10 gauge wire will actually power the pump. Since we’re adding the relay to trigger the power now, you’ll want that extra fuse on the new power wire in case something ever grounds out.
I am added a Walbro 450 to my 94 cobra. What is the purpose for a different relay and circuit over the stock CCRM?
The stock wiring is pretty small gage, and bigger pumps will need more sustained current to work. The worry is over time the stock wires could fail and not allow enough voltage to the pump, eventually taking out the pump or even melting the stock wiring and causing issues like a short. It’s just a safety precaution, I went with the bigger 525 pump to I wanted to be safe and make sure the pump was able to get all the current it needs to operate at peak performance
Can I use this for a Lsa Swap Fox
Yeah the pump would work for all fox 87-95 at least. If not up to 04.
Qfs makes a drop in hanger with the 525 pump too that has -8 and -6 fittings already on it too. That’s what I’m installing next
Was worried about using QFS pump vs Walbro.
How is it holding up ?
is the QFS pump just as noisy as the Walbro?
Qfs has been solid, I’m actually upgrading the hanger/pump to their unit with AN fittings on it here soon so I can run -8,-6 feed and return up to the rails.
Other than hearing the pump prime when you key over and the engine not running, I don’t hear it any other time.
That’s the exact pump/hanger I am trying to decide to get for a coyote swap fox body. I see they have a 6an for both feed and return or a 8an and 6an. Do you know why someone would go with the 8an/6an as opposed to both 6an?
@@mrprfct7069 I would def go 8,6
I can only see 6,6 if it was a pretty low hp application like maybe a NA build, but the cost for 8an is pretty much the same as 6an so might as well run 8,6 is my thought. I’m having a problem right now with the stock fuel lines not being able to keep up with the big pump and pressure drops from 60 down to 30s in boost so I have to upgrade the lines to fix that. That small 5/16 feed just ain’t cutting it lol
@@PeakPerformanceEngineeringthank you. 8/6 it is. I plan to stay NA on this coyote using the corvette c5 filter that’s been recommended by many. Apparently this filter will keep the pressure at the sweet spot just under 60psi for the coyote. There are 2 versions of the filter. One with built in 6an fittings and the other with regular nipples.
I ran two of those lol
Must be putting down some power!
I’m getting ready to drop in a new hanger with -8 and -6 a fittings so I can redo the stock fuel lines this winter.
@@PeakPerformanceEngineering -10 from each pump. -10 return. TT396 gen 3 hemi.
@fastfnhemi4384 beast mode!