Some potential upgrades..
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Senior User
Joined: Jun 2005
Posts: 292
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Some potential upgrades..
I am thinking about keeping the F-250 I bought in June. It has the 5.4L and it has been a good motor for what I need it to do.. but the gas mileage is kinda crappy!
I've heard that putting a aftermarket muffler such as a flowmaster will give me an extra MPG or 2.
Second is a Banks Transcommand to take care of the 'carlike' shifts when towing maxed out loads. Anyone have one of those? Opinions?
I think I need my manifold bolts replaces because I can hear an exhaust leak when first started and also with the radio down and accelerating. How much should that cost? Should I go to Ford or someone else?
If I get a Transcommans which controls the transmission sort of like a tuner does.. Would it be worth it to get a tuner too? I would want to run 87 Octane..
Give me your thoughts...
I've heard that putting a aftermarket muffler such as a flowmaster will give me an extra MPG or 2.
Second is a Banks Transcommand to take care of the 'carlike' shifts when towing maxed out loads. Anyone have one of those? Opinions?
I think I need my manifold bolts replaces because I can hear an exhaust leak when first started and also with the radio down and accelerating. How much should that cost? Should I go to Ford or someone else?
If I get a Transcommans which controls the transmission sort of like a tuner does.. Would it be worth it to get a tuner too? I would want to run 87 Octane..
Give me your thoughts...
Elder User
Joined: Jun 2005
Posts: 645
Likes: 2
What kind of mileage are you getting? The Super Duty is a lot of truck for the 5.4L to haul around. First place to check for an increase is the Y-pipe on the exhaust system. If it's like the one on my '03 you'll see why it has to go. Manifold bolts
, one of the reasons I traded my '99. I had three missing on each side. If a couple of nuts are already snapped off the manifold has to come off to get the bolt shafts out. Figure about $1500 for a dealer to do both sides or about 12-16 hours of labor for you to do it yourself. It could go easy or it could be a pain. That's why I traded. The new bolts from Ford are stainless so at least they are aware of the problem.
, one of the reasons I traded my '99. I had three missing on each side. If a couple of nuts are already snapped off the manifold has to come off to get the bolt shafts out. Figure about $1500 for a dealer to do both sides or about 12-16 hours of labor for you to do it yourself. It could go easy or it could be a pain. That's why I traded. The new bolts from Ford are stainless so at least they are aware of the problem.
Senior User
Joined: Oct 2004
Posts: 244
Likes: 0
From: Seminole, FL
I don't think you will see much difference with just a Flomaster muffler. I put one on my 03 F150 Screw 4.6L. Sounded MUCH better and might have helped performance just a little but didn't notice an improvement in mpg.
I was using a Diablo Predator that made a HUGE improvement in throttle response and shifting. Might have seen a little improvement in mpg but a pretty big difference in power, especially with 91 octane gas. I ran 87 oct when not towing and just adjusted the timing so it did not ping. Then when I wanted to tow I put in 93 and advanced the timing back and had more power. Worked pretty well. Plus it reads and resets trouble codes and can be easily updated for free from diablosport.com.
I have it on eBay right now since I just traded the truck for a Powerstroke. If you are interested it works on 99-03 F-series 4.6 and 5.4L. The Buy It Now price is $275. It is like new. If you do the Buy It Now I will ship to free since you are an FTE member. Just put a note in that you are from FTE.
Hope this helps!
I was using a Diablo Predator that made a HUGE improvement in throttle response and shifting. Might have seen a little improvement in mpg but a pretty big difference in power, especially with 91 octane gas. I ran 87 oct when not towing and just adjusted the timing so it did not ping. Then when I wanted to tow I put in 93 and advanced the timing back and had more power. Worked pretty well. Plus it reads and resets trouble codes and can be easily updated for free from diablosport.com.
I have it on eBay right now since I just traded the truck for a Powerstroke. If you are interested it works on 99-03 F-series 4.6 and 5.4L. The Buy It Now price is $275. It is like new. If you do the Buy It Now I will ship to free since you are an FTE member. Just put a note in that you are from FTE.
Hope this helps!
