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What are your goals? Those goals will dictate the mod options for the new little beasty. Towing? Long highway trips? Off roading or mudding? Hotrod? Lift? Giant sports car? Bigger tires?.............
There isn't much hidden power in the 5.4. You can spend hundreds possibly thousands on small mods and the dyno runs from the past show meager improvements and some of the mods move the powerband upward.
That definitely looks worthwhile to me, to eliminate the 1 1/2 inch choke points in the exhaust right as it leaves 2 1/2 in exhaust pipes coming right out if the exhaust manifolds!
How in the heck was that EVER consiered a "Better Idea" from the engineers at FORD???
Absolutely amazing some of the things the factory comes up with and actually produces.
96firephoenix,
Thank you so much for posting this for me.
Off the the muffler shop I go!
I think that the 5.4 has a resonator and a muffler, it's a different setup than the 6.8 V-10 which has only the cat and muffler with all 3" pipe.
The T shaped Y pipe is a puzzling item, supposed to have been done in response to some folks complaining about an exhaust "flutter" sound with the earlier Rams horn shaped Y pipe. I started with the T pipe and now have Banks headers and full flow Y pipe and I've never heard any "flutter".
Those 2.5" exhaust manifold outlets are downstream a couple of inches from a much smaller internal opening inside the manifold just after the last exhaust port. I'm no exhaust system expert but to me the factory manifolds seem to be an even bigger restriction than the T shaped pipe. Maybe I'm wrong and the hotter exhaust right at the cylinder head keeps gasses moving better inside the small manifold passages.
4.30 gears will really wake it up. Although you have 4.10's so I would say 4.56's. Open the Y-pipe as seen above remove the resonator at the back and install a good quiet high flow muffler. Maybe even headers if you have to replace any exhaust studs that would be the time. After all that..... a supercharger from a lightning!!!
Is your exhaust actually like that? The "flutter" was only an issue on the v10s. The 5.4 didn't have that issue and the manifolds are obviously different also. While I haven't seen any 5.4 ex myself I think the exhaust is entirely different u til you hit the cat
Is your exhaust actually like that? The "flutter" was only an issue on the v10s. The 5.4 didn't have that issue and the manifolds are obviously different also. While I haven't seen any 5.4 ex myself I think the exhaust is entirely different u til you hit the cat
yes IIRC the 5.4 has the same pipe. The back of the 5.4 sits at the same point as the 6.8 (same block dimensions) so everything lines up and they can use the same Y-pipe.
I have not yet investigated the stock exhaust, other than noticing the tiny exhaust pipe exiting the rear of the vehicle.
So does it have a y-pipe off the engine that goes into a single 3 inch rear section that goes to a single muffler at the back of the vehicle?
I'm guessing the stock single muffler has a 3 inch inlet?? What size is the small outlet into the tiny exhaust pipe that exits the vehicle??
Thanks
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I think it's 2.5" the whole way back from the collector, but I could be misremembering. was 14mo ago that I did anything with my exhaust, and that was when the resonator (part aft of the axle) fell off...
yay rustbelt life. I do know mine had that collector with the neck-down. So dumb.
Wish exhaust mods or tuners or better air filter setups made a significant difference, but seems that those modifications don't produce much of a significant difference in power, or improved drivability, or responsiveness.
Deeper gears. Going from my factory 3.73s to 4.88s (now with 35"s the effective ratio is 4.39) was the single biggest performance boost that I have done for my EX, like a different truck.
