The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Doing LS Swap

LS short box · 09-03-2020, 05:02 PM

I doubt your current in-line fuel pump will support the the 58 psi needed for the LS swap. I've used both internal and external fuel pumps for LS swaps. External Bosch 044 and internal Walbro 255. Buy from a known supplier so you don't get a knock off.
I like -6 line SS line and a C5 fuel pressure regulator. Buy Wix or Delco.
I always buy an aftermarket harness. I like Howell or Speartech.
If your original wiring harness is hacked I would redo with an aftermarket harness like Painless or American Auto wire. The LS computer and engine loves nice full 12 volt power and nice clean grounds. Also keep in mind the LS alternator puts out 2-3 times more than your stock alternator so it needs wiring to support that increased output.
I have a buddy running the 2002 Camaro radiator and fans. Works like a champ. Your harness supplier can supply the dual fan out puts and relays.
Good luck with the swap. Don't hesitate to ask questions.

09-03-2020, 05:02 PM	#10
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,925	Re: Doing LS Swap - I have no idea what I'm doing! I doubt your current in-line fuel pump will support the the 58 psi needed for the LS swap. I've used both internal and external fuel pumps for LS swaps. External Bosch 044 and internal Walbro 255. Buy from a known supplier so you don't get a knock off. I like -6 line SS line and a C5 fuel pressure regulator. Buy Wix or Delco. I always buy an aftermarket harness. I like Howell or Speartech. If your original wiring harness is hacked I would redo with an aftermarket harness like Painless or American Auto wire. The LS computer and engine loves nice full 12 volt power and nice clean grounds. Also keep in mind the LS alternator puts out 2-3 times more than your stock alternator so it needs wiring to support that increased output. I have a buddy running the 2002 Camaro radiator and fans. Works like a champ. Your harness supplier can supply the dual fan out puts and relays. Good luck with the swap. Don't hesitate to ask questions.