Compression Ignition Addict
Join Date: Jul 2009
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first off there is no throttle body to create the vacuum you want to vent the BOV. And believe it or not the extra air is probably helping fuel as you are getting a more complete burn. Coming from someone who is huge turbo'd the truck out of boost at 75 is a dog and actually runs higher EGTs without the air.
i have tried this theory when i was stock turbo by flipping the smoke switch, which basically opens the turbo all the way up, and would drop psi as much as 6 psi cruising and had no improvement in mpg, made it harder to drive and smoked a hell of a lot unless you are going to reach up and keep flipping the switch on and off.
if you want fuel economy do the mods:
exhaust, egr delete, tunes and drive slower. these trucks start to drink fuel at 70+ sadly i drive like you as i live in atlanta and 285 means you get crushed if you do less than 70. but if i drop rpms below 2k and even around 1800 which is about 60-65 the mileage increase is surprising.
2005 Excursion Limited 4x4
2005 F250 Fx4, Crew Cab, King Ranch
8" Procomp Lift w/ ext. reservoir shocks, Trac Bars, 22x14 Fuel Mavericks, 38x15.50 Fuel MTs, O-ringed heads w/ valve job, studded, 5" exhaust, Fass Ti w/ RR, XDP Sump, Coolant Filter, Singer 270Amp Alt, BPD 58v FICM, S&B Intake, Powermax, S&B intake Elbow, Snow WMI, ID Tunes, TSD tunes, PHP Ficm Programmer (Atlas 80 majority of the time), Mishimotor Radiator & Intercooler, BPD Water Pump, Gates HD Serp Belt, Flex-a-lite E-Fan Conversion
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