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Old 07-18-2014, 03:34 PM   #1000

GretchenGotGrowl's Avatar
Drives: 11 F150 EB/13 Sonic RS/15 Z06
Join Date: Sep 2010
Location: Little Rock, AR
Posts: 7,133
Originally Posted by TommyTheCat View Post
so the High pressure fuel pump wasnt getting enough fuel?
would putting a ZL1 pump on the LFX matter without all that extra HP?
Both stock pumps are good to around 500 RWHP on an automatic. For me, the HPFP was the one that couldn't keep up, but we were near to maxing out the in-tank pump as well, so we decided to upgrade it when we put the supplemental fuel system on. We are probably close to the limits of the ZL1 in-tank pump now so we will need to either slap on the ADM FMIC, a BAP, or put in dual in-tank pumps to push it much further. I'm more worried about trying to make the same power without the supplemental system right now that making more power.
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