fuel pump wire with high/low voltage circuit
#333
I know this thread is so old.
i didn't see this setup.
worker ?
Update now running this on aftermarket ecu with rpm based switching. all works fine.
i didn't see this setup.
worker ?
Update now running this on aftermarket ecu with rpm based switching. all works fine.
Last edited by leecavturbo; Aug 24, 2019 at 03:35 AM. Reason: update
#335
EvoM Community Team Leader
I'll echo that concern over the full interrupt in the circuit. I do like how simple the circuit is though. Other downsides would be you lose out on all the factory wire and redundancy of having the factory setup still functional.
#336
Evolved Member
iTrader: (33)
I’m finally getting ready to do this mod. First I’m moving the battery to the trunk and then it’s game on.
But im going to take a slight different approach when it comes to activating the circuit. Since my car is tuned in 91 and I have a alt map switch in my car. I will use that switch the activate the high voltage circuit. I ordered a 5vdc relay so whenever I activate my alt map it will enable the new 12v circuit along with the Hobbs switch.
That way during normal 91 oct driving the ecu will act as normal and once I activate the alt map it will allow the fuel pump to see the higher voltage and push the e70 fuel I’m going to run.
But im going to take a slight different approach when it comes to activating the circuit. Since my car is tuned in 91 and I have a alt map switch in my car. I will use that switch the activate the high voltage circuit. I ordered a 5vdc relay so whenever I activate my alt map it will enable the new 12v circuit along with the Hobbs switch.
That way during normal 91 oct driving the ecu will act as normal and once I activate the alt map it will allow the fuel pump to see the higher voltage and push the e70 fuel I’m going to run.
The following users liked this post:
leecavturbo (Nov 7, 2020)
#339
Evolving Member
iTrader: (2)
I have -10 feed line and the stock feed line will be turned into return. I prefer doing the low/high setup i was having a difficulty understanding due to confusion after reading most of this thread.
i understand this ^^^^^ is this correct way to do the low/high set up?
#340
EvoM Guru
iTrader: (1)
Originally Posted by infam0usndn2nv
First of all thank you very much Mrfred for the response i was trying to message u but your inbox is full.
I have -10 feed line and the stock feed line will be turned into return. I prefer doing the low/high setup i was having a difficulty understanding due to confusion after reading most of this thread.
i understand this ^^^^^ is this correct way to do the low/high set up?
I have -10 feed line and the stock feed line will be turned into return. I prefer doing the low/high setup i was having a difficulty understanding due to confusion after reading most of this thread.
i understand this ^^^^^ is this correct way to do the low/high set up?
#341
EvoM Community Team Leader
This is probably the easiest way to wire the relay.
You could add a little safety by connecting the positive side of the coil to switched ignition instead of straight to terminal 30 of the relay. That's going to add more wiring, fuse, and more splicing into the factory harness.
Keeping the High/Low intact really just requires you to keep the factory pump wiring, and also the additional new wiring.
You could add a little safety by connecting the positive side of the coil to switched ignition instead of straight to terminal 30 of the relay. That's going to add more wiring, fuse, and more splicing into the factory harness.
Keeping the High/Low intact really just requires you to keep the factory pump wiring, and also the additional new wiring.
#342
1) Wire the primary pump up to the stock fuel pump wiring.
2) Set up the circuit that Biggiesacks shows in his post, and attach it to the primary pump as well. I recommend using the adjustable pressure switch sold by SpoolinUp, and then setting that switch to operate at perhaps 10 psi, and then set the pressure switch for the secondary pump to operate at maybe 17 psi.
3) Set up a new ground for the pumps. The factory ground is not sufficient. Each pump ground should be wired to the chassis with 10 ga wiring.
#343
Evolving Member
iTrader: (2)
infam0usndn2nv, what Biggiesacks says here is definitely the easiest implementation. To be clear, this is what needs to be done:
1) Wire the primary pump up to the stock fuel pump wiring.
2) Set up the circuit that Biggiesacks shows in his post, and attach it to the primary pump as well. I recommend using the adjustable pressure switch sold by SpoolinUp, and then setting that switch to operate at perhaps 10 psi, and then set the pressure switch for the secondary pump to operate at maybe 17 psi.
3) Set up a new ground for the pumps. The factory ground is not sufficient. Each pump ground should be wired to the chassis with 10 ga wiring.
1) Wire the primary pump up to the stock fuel pump wiring.
2) Set up the circuit that Biggiesacks shows in his post, and attach it to the primary pump as well. I recommend using the adjustable pressure switch sold by SpoolinUp, and then setting that switch to operate at perhaps 10 psi, and then set the pressure switch for the secondary pump to operate at maybe 17 psi.
3) Set up a new ground for the pumps. The factory ground is not sufficient. Each pump ground should be wired to the chassis with 10 ga wiring.
Thanks to the both of you. Now i understand what i gotta do.
#345
Newbie
iTrader: (4)
infam0usndn2nv, what Biggiesacks says here is definitely the easiest implementation. To be clear, this is what needs to be done:
1) Wire the primary pump up to the stock fuel pump wiring.
2) Set up the circuit that Biggiesacks shows in his post, and attach it to the primary pump as well. I recommend using the adjustable pressure switch sold by SpoolinUp, and then setting that switch to operate at perhaps 10 psi, and then set the pressure switch for the secondary pump to operate at maybe 17 psi.
3) Set up a new ground for the pumps. The factory ground is not sufficient. Each pump ground should be wired to the chassis with 10 ga wiring.
1) Wire the primary pump up to the stock fuel pump wiring.
2) Set up the circuit that Biggiesacks shows in his post, and attach it to the primary pump as well. I recommend using the adjustable pressure switch sold by SpoolinUp, and then setting that switch to operate at perhaps 10 psi, and then set the pressure switch for the secondary pump to operate at maybe 17 psi.
3) Set up a new ground for the pumps. The factory ground is not sufficient. Each pump ground should be wired to the chassis with 10 ga wiring.