Need help With running two walbro 525s
Thread Starter
Staging Lane
Joined: Jan 2018
Posts: 71
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Need help With running two walbro 525s I have a 1995 trans am , I recently converted to holley terminator 24x
Now I want Install two walbro 525s , how do I go about doing that....
like I know I need 10 gague wire and 30 amp relays
but how should they be ran where do I need to tie the Holley fuel wire to.. I'm using factory ecm as well to control things the Holley won't
I know Holley ecm is good for 15 amp.
So I can't run straight to it
.
any help would be appreciate it
Now I want Install two walbro 525s , how do I go about doing that....
like I know I need 10 gague wire and 30 amp relays
but how should they be ran where do I need to tie the Holley fuel wire to.. I'm using factory ecm as well to control things the Holley won't
I know Holley ecm is good for 15 amp.
So I can't run straight to it
.
any help would be appreciate it
Nice. Not knowing how the Holley controls the fuel pump, I am assuming its an on/off and not progressive/variable controller. If so, run a dedicated power wire from the alternator to relays mounted near the tank. Then have the relays turn on with either the factory or Holly wiring.
Thread Starter
Staging Lane
Joined: Jan 2018
Posts: 71
Likes: 0
Ok When I hook up the holley wire to factory fuel pump wiring thinking it's the gray wire that feeds the pump can I run a relay there to turn the pumps on if so do you know what wires will need to be hooked up and ... for both pumps do I connect the wires together after they are hooked up or just run each individually to the alternator
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IMO, you need to read the instructions from the Holley kit.
Yes, it can PWM a fuel pump and yes it can command a second fuel pump based on whatever variable you decide. I would not use the factory PCM for anything but thats just me. The only wire you should be using for anything factory from tank is the fuel level sender lead.
I would use the green holley fuel line as a trigger to fuel pump #1, and then use one of the four outputs as a trigger for fuel pump #2. Wiring should be fairly simple, heavy wire, and good relays. Use something like this to run new lines to pumps and from your cutoff switch/battery
https://www.racetronix.biz/product.asp?ic=bcws-001
Yes, it can PWM a fuel pump and yes it can command a second fuel pump based on whatever variable you decide. I would not use the factory PCM for anything but thats just me. The only wire you should be using for anything factory from tank is the fuel level sender lead.
I would use the green holley fuel line as a trigger to fuel pump #1, and then use one of the four outputs as a trigger for fuel pump #2. Wiring should be fairly simple, heavy wire, and good relays. Use something like this to run new lines to pumps and from your cutoff switch/battery
https://www.racetronix.biz/product.asp?ic=bcws-001
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Staging Lane
Joined: Jan 2018
Posts: 71
Likes: 0
Yes, it can PWM a fuel pump and yes it can command a second fuel pump based on whatever variable you decide. I would not use the factory PCM for anything but thats just me
I would use the green holley fuel line as a trigger to fuel pump #1, and then use one of the four outputs as a trigger for fuel pump #2. Wiring should be fairly simple, heavy wire, and good relays.[/QUOTE]
Only reason why I'm using the lt1 pcm is for wheel speed sensors abs t56 car , and I just tap the harness for tac and speedo to work that's all...rest of the car is being ran from the Holley unit
I need to trip a wire to fuel pumps so the gray wire is already there in the car to send signal to pump. That's factory feed for the pump.. if I went to by pass would I have to hook up fuel wire from holley to a relay then to run a wire straight to pump not trying to short out Holley ecm
I would use the green holley fuel line as a trigger to fuel pump #1, and then use one of the four outputs as a trigger for fuel pump #2. Wiring should be fairly simple, heavy wire, and good relays.[/QUOTE]
Only reason why I'm using the lt1 pcm is for wheel speed sensors abs t56 car , and I just tap the harness for tac and speedo to work that's all...rest of the car is being ran from the Holley unit
I need to trip a wire to fuel pumps so the gray wire is already there in the car to send signal to pump. That's factory feed for the pump.. if I went to by pass would I have to hook up fuel wire from holley to a relay then to run a wire straight to pump not trying to short out Holley ecm
Yes, it can PWM a fuel pump and yes it can command a second fuel pump based on whatever variable you decide. I would not use the factory PCM for anything but thats just me
I would use the green holley fuel line as a trigger to fuel pump #1, and then use one of the four outputs as a trigger for fuel pump #2. Wiring should be fairly simple, heavy wire, and good relays.
I would use the green holley fuel line as a trigger to fuel pump #1, and then use one of the four outputs as a trigger for fuel pump #2. Wiring should be fairly simple, heavy wire, and good relays.
Only reason why I'm using the lt1 pcm is for wheel speed sensors abs t56 car , and I just tap the harness for tac and speedo to work that's all...rest of the car is being ran from the Holley unit
I need to trip a wire to fuel pumps so the gray wire is already there in the car to send signal to pump. That's factory feed for the pump.. if I went to by pass would I have to hook up fuel wire from holley to a relay then to run a wire straight to pump not trying to short out Holley ecm[/QUOTE]
Thats what you need to do. Again, stop trying to use factory harness to run 255 or any new fuel pump for that matter. Run new bulkhead fitting with new power leads into the two in tank pumps. The Holley will trigger both new relays that run the new pumps. Forget factory feed and all that.