Help Needed Poor fuel mileage - Page 2 - F-Series & SuperDuty Diesel Forums

IDSTROKER · 01-16-2012, 09:26 PM

We were wondering if the ecu programming would do it Kooldarrin has the
VDH4 and i have the VDH5 programming ...

Racinghcr · 01-18-2012, 01:08 AM

Take off the factory muffler and run a straight pipe from turbo on back,then put on a good Air Box and Filter like AFE,ect. Get more air in and push more out=power and better mileage. These are the two biggest HP and Mileage gains I performed on my 7.3 PSD for the least cost. If you have unlimited funds MBRP has a new 4 inch 7.3 exhaust system including the down tube off the turbo and stainless steel straight pipe all the way back--a good investment. PS: What is your rear gear RATIO?? Mine is a 4X2 with a 3.73 and I get 20-21.5 mpg on the road at 65 mph. I get 13-13.8 towing my 13K lbs,40 ft Fifthwheel with that gear. A friend of mine has a dually f-350 7.3 with a 4.11 gear and gets about 4-6 mpg less. Good luck==there are many other updates that will help to a lesser degree,but they all add up !

01-16-2012, 09:26 PM	#11
IDSTROKER Blackfoot ID Join Date: Jul 2007 Location: Blackfoot ID Posts: 180 Thanks: 16 Thanked 2 Times in 2 Posts View Photos By: IDSTROKER	We were wondering if the ecu programming would do it Kooldarrin has the VDH4 and i have the VDH5 programming ... __________________ 2003 Ford SD 7.3 Auto I Have a 3" level kit 4" turbo back exhaust Shimmed fpr AFE stage II intake TS 6 POS Chip. B&W turnover Ball Hitch PRYO& Boost gauges The wicked wheel & boost Annihilator AIH Delete plug Coolant Filter Bilstein shocks all around toyo open country mt 315/75/16 In Tank mod pre pump filter walbro fuel pump and hutch mod

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01-18-2012, 01:08 AM	#12
Racinghcr Racinghcr Join Date: Jul 2005 Location: Greensburg,Indiana Posts: 49 Thanks: 20 Thanked 2 Times in 2 Posts View Photos By: Racinghcr	Take off the factory muffler and run a straight pipe from turbo on back,then put on a good Air Box and Filter like AFE,ect. Get more air in and push more out=power and better mileage. These are the two biggest HP and Mileage gains I performed on my 7.3 PSD for the least cost. If you have unlimited funds MBRP has a new 4 inch 7.3 exhaust system including the down tube off the turbo and stainless steel straight pipe all the way back--a good investment. PS: What is your rear gear RATIO?? Mine is a 4X2 with a 3.73 and I get 20-21.5 mpg on the road at 65 mph. I get 13-13.8 towing my 13K lbs,40 ft Fifthwheel with that gear. A friend of mine has a dually f-350 7.3 with a 4.11 gear and gets about 4-6 mpg less. Good luck==there are many other updates that will help to a lesser degree,but they all add up !