Fuel Pump and Injector Sizing for Your LS Swap Project

In this episode, we go over calculating how big of a fuel pump and fuel injectors you need for your LS Swap project. The spreadsheet mentioned in the video can be downloaded from this link: lowbuckls.com/fuelsystem/
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[@dakotasansonetti1752]

This helped me so much. Your content has greatly improved my the progress of my first build. Making it less intimidating and putting me on a more direct path instead of trial and error. Thank you Randy!

[@LowbuckLS]

You’re welcome, thanks for watching and commenting Dakota!

[@dakotasansonetti1752]

@@LowbuckLS You are welcome sir. I've been curious to know if there is any videos in the future featuring your turbo build either doing pulls or a dyno run? Would love to see your truck in action!

[@LowbuckLS]

@@dakotasansonetti1752 hopefully later this summer, wanting to upgrade to a 4L80E transmission before I take the truck to the dyno or the track. But first wanting to get the LS swap done on my Suburban though. Once I have it ready I will definitely share results from the track and dyno though.

[@dakotasansonetti1752]

@@LowbuckLS outstanding! Thank you for the update

[@general23cmp]

Great info. I have a similar spreadsheet. For the fuel pump, I take whatever my fuel injectors would be at 100% duty cycle and then add 20% margin. That way I know I will run out injector before pump. I do size injectors to ideally be at 80% duty cycle max.

[@LowbuckLS]

That sounds like a good strategy for fuel pump sizing, thanks for your input, I think I’ll change my spreadsheet to incorporate that.

[@josephmoore9992]

Thank you for the information I will be definitely be using this.

[@LowbuckLS]

You’re welcome!

[@factoryratgarage]

That was a great informative video.

[@LowbuckLS]

Thanks sir!

[@bagged68C10]

Great info!!

[@LowbuckLS]

Thanks Tim

[@dbc105]

Randy, is it possible to change the #cylinders? I would like to use this for my 4 cylinder Mustang SVO. Thanks, DC

[@HeadFlowInc]

Man those numbers seem to be on the conservative side. Iirc my decapped 24.8# flowed +- 74# and I thought the injector calculator showed they were good to: 60 psi
Gas 925 crank
e85 725 crank
The 525lph pump @60#+ should handle 900+ hp according to Walbro.