Posted on August 16, 2016 May 29, 2018 by FiTech EFI — 4 CommentsHow much INLET ‘low’ pressure should I have? 3-8 lbs is perfect. Post navigationPrevious post: How much fuel is stored in the Command Center?Next post: Is the Command Center affected by heat? How close to the headers can I mount it? 4 comments on “How much INLET ‘low’ pressure should I have?” Ryan February 19, 2017 What will happen if mechanical fuel pressure to the command center exceeds 8 psi Bryce - FiTech Tech Pro February 21, 2017 Fuel will blow past the needle and seat causing the Fuel Command Center to over fill. The end result is fuel coming out of the vent line. Steve Clingman February 22, 2017 Can a factory 1990 mustang in tank efi fuel pump work with a 600hp unit? Bryce - FiTech Tech Pro February 28, 2017 The factory pump will work with the Go EFI 4 but will be limited as the pump was designed to work with the factory motor. If your engine makes more than factory the pump may not be able to flow enough fuel to support your engine. You need a pump that can flow 255 LPH to make 600 HP.