Yes the dreaded Aluminum rain drop drone. Get caught in one of the Rocky Mountain rains storms, with the big honkin rain drops, at elevation; and it sounds completely different from a normal rain condition we get in Texas, albeit not enough of them this time of year. Cant wait to hear it in...
No doubt the load capacity of the vehicle determines the max limit. What some E range tires offer, is the ability to safely run higher PSI when towing. Some of the Michelin E range tires, LTX, have 3 steel belts instead of the standard 2. This may offer additional flat resistance.
Old thread from a year ago, when some of us were searching for a better sound: https://www.expeditionforum.com/threads/exhaust-sound-how-to-slightly-improve.45494/
Gentlemen, happy to report, I had my exhaust guy cut in this Borla muffler, from their Touring (quietest) series. It is 2.75" center...
Since 5280 Tunage did all of the testing of different systems & mufflers, I am happy with just the Borla muffler mod. It's been over a year now, no issues.
Do you have any e85 fuel in your area? 50/50 e85 + 91 = an octane rating of 95.5.
And regardless of what you hear about the Gen.2 3.5 EB in a Gen.4 Expedition, you do need the JLT catch can. You will be surprised how quickly it will accumulate oil when in the boost.
Nothing in the world is wrong...
Hey BobWard
What I have learned from my Expy over the last year of Interstate travel - cruise at 77 or 80 depending, Eco mode, 93 Perf Tune, running E50 = manually downshift to 9th or 8th gear, trading RPM's for Boost. Boost = more fuel. Downshifting = less boost, but more RPM's. Avg. 20 - 22...
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