 Fuel pump wiring in a 6 conversion - non relay board, Is a relay needed? |
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| nditiz1 |
 Sep 8 2021, 01:12 PM
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Senior Member  Group: Members Posts: 1,202 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region 
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So I'm not using a relay board in my 6 conversion. I have cut the 14 point harness where it branches to the trunk, so maybe just 2 ft off the end. I left the starter wire the full length. In hindsight I should have left the tach and idiot light wires just as long, but it's OK, enough to butt splice. Anyway, there are 2 red wires(switched 12 volts) I was planning on 1 for the ECU and have the other kick on the fuel pump. Is there any reason I need to run a relay for the fuel pump?
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| nditiz1 |
Sep 10 2021, 05:38 AM
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Senior Member Group: Members Posts: 1,202 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region
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It does not, I think I can tell microsquirt to do it that way. So I can use one of the red wires in the engine compartment to supply power to the relay and the signal can come from the ECU.
@VaccaRabite - is that how you have your megasquirt setup? Also, what is supplying the power to the two red wires and 1 black wire in the 14 point harness? Somebody mention to not run it through the ign switch. Just want to make sure these are not tied to it. The relay board schematics do not state where those wires go to. |
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Posts in this topic
nditiz1 Fuel pump wiring in a 6 conversion - non relay board Sep 8 2021, 01:12 PM
Steve The ignition switch is pretty wimpy and Porsche al... Sep 8 2021, 02:26 PM Dustin The relay is there to prevent the current that the... Sep 8 2021, 02:43 PM ClayPerrine Put the fuel pump up front.
Put a relay in above ... Sep 8 2021, 02:47 PM
Steve
Put the fuel pump up front.
Put a relay in above... Sep 9 2021, 07:07 AM IronHillRestorations +1 on Clay’s advice. Fuel pumps do better pushin... Sep 9 2021, 10:29 AM SirAndy I have cut the 14 point harness where it branches ... Sep 9 2021, 11:10 AM nditiz1
[quote name='nditiz1' post='2943915' date='Sep 8 ... Sep 9 2021, 12:50 PM Spoke
I was planning on 1 for the ECU and have the othe... Sep 9 2021, 08:12 PM mepstein
I was planning on 1 for the ECU and have the oth... Sep 10 2021, 05:22 AM ClayPerrine If you are running Megasquirt, put the relay board... Sep 10 2021, 05:40 AM nditiz1 Thanks Clay. Very helpful, more than the one from... Sep 10 2021, 06:28 AM VaccaRabite For my Microsquirt the fuel pump works exactly lik... Sep 10 2021, 08:13 AM nditiz1 Ok wired it up on my test stand through the micros... Sep 10 2021, 10:07 AM |
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