I recently became the proud owner of an early 1999 F-250 superduty Lariat Crew Cab automatic 4X4 with 205k miles. Well, that was a mouthful! I have been very impressed with the spaciousness of the cab, the comfort of the ride, and the power and acceleration that the truck exhibits when merging onto the interstate (or just passing some guy cruising at 48mph while talking on his stinking cellphone)
I have new 305/75R16’s all the way around , a K& N intake, and everything else appears to be stock. I have been “given permission” to modify the truck, ostensibly, to “…increase its performance while maximizing economy”. (That's my story, and I'm sticking to it) Of course, these modifications will be done incrementally, as there are cosmetic/ancillary issues that the bosslady has placed on my Honey-do Truck list – like new seating surfaces, repairing/replacing the power seat motor, sliding rear window latch, Master window switch, driver’s side power mirror, locking hubs, etc.
Given that these trucks are infinitely customizable, and my desire for power and torque to haul my little horse trailer and homewoner-sized Kubota tractor/loader is balanced by my need for the same or better fuel economy, please rate the following modifications in order of desirability:
1) upgrade post-turbo down tube to 4”, and run minimum of 4” exhaust with a Walker BTM
2) Replace K&N Intake with another intake system
3) Install a pyro, pyro gauge and chip/tuner (which?)
4) Upgrade injectors
Thanks, and I look forward to your response(s). :bow:
P.S. At a speedo reading of 60 mph with NO O/D, I'm turning 2250 RPM. With O/D I'm at 1750. IS this normal, or should I look into changing the diff?