Doc,
Need a smart pencil I don't own one just OJT experience.
This sort of dovetails to an earlier post on fluid dynamics.
I know from gauge reading and performance loss, that with stock single fuel pump set up I run out of fuel delivey capability when pulling a 12K trailer, pressure in main filter bowl drops from 5 psi to 2 and max speed is 40-60 mph depending on size of hill. This also happens when running empty and punching it from 40 mph pressure drops off but truck stil accelerates okay. Temps all good, IAT 130F, boost at 12-14, rpm limited to 2000 rpm, egt 750-800 engine want's to do more but can't fuel it enough.
I'll be adding Racor filter soon and 2nd lift pump, question is do I need more GPM in a parrallel mode 2nd path to final filt or more PSI 2 pumps in series mode. Is this one of those trade off situations that I'll have to try either way and see which works best. Maybe parallel with a manual switch to energize in tow mode or perssure switch activated when fuel pressure drops below X psi, that way I don't over deliver when I don't need to.
What are your thoughts
Tim, 98GM K1500 6.5TD(L56/L65), Heath PCM,3.73 gear,4L80 tr,4" exh,Amz air filt&dual oil flts, Heath remote FSD, TDO-7 clone turbo, Heath fan clutch,mandrel crossover, pilar gage BST/EGT/TRN, remote elec fan tran cool,alum trn pan