5.4 Mods?
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5.4 Mods?
I got my truck ('01 F250 SDSC 4x4, 5.4L, auto w/4.10 LS) about 3 weeks ago. I just got back from a 700 mile trip this past weekend, and got an average of about 12-13 mpg. I'm very happy with the truck, but would like a little better mpg on trips. Not looking for, or expecting significant fuel economy (otherwise would have gotten a 4-banger), but would like to know what are the best mods / additions I can make that would provide the best benefit. I've got a bed cover, but pretty much everything else is stock. Should I look at a K&N replacement filter or full FIPK; full new exhaust (headers) or just cat-back, ect.. Would appreciate comments / ideas from those who have tried these things on trucks similiar to mine. Also, cost versus return on investment is an issue. Thanks in advance.
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Joined: Dec 2004
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From: NY
I have a '04, 5-4, Auto, with 3.73's.
I've installed a Borla Cat-back, underdrive pulleys, a home made FIPK, a Retrax Tonneau, and swapped all fluids to Amsoil synthetics. The engine I'm running Mobil 1.
18.8 mpg is about the norm. Had a 20.7 on one long trip.
Mods help.
I've installed a Borla Cat-back, underdrive pulleys, a home made FIPK, a Retrax Tonneau, and swapped all fluids to Amsoil synthetics. The engine I'm running Mobil 1.
18.8 mpg is about the norm. Had a 20.7 on one long trip.
Mods help.
Last edited by sprtsmn; Nov 29, 2005 at 11:27 AM.
Posting Guru
Joined: Apr 2005
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From: duncan oklahoma
my wifes 00 f150 stepside 5.4 3.55 ls has the k&n filter,3 in. single cat back,and a diablo chip and am getting around 22 mpg. was only getting around 15 before mods. a few mods like this to your 250 will work but will prob. only increase to 15-18 mpg
Senior User
Joined: Jun 2005
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From: La Mesa Ca
with my 02 super cab 5.4 auto on 33's and 3.73's on a trip to las vegas from san diego i got 17MPG and the only thing i did for mods is remove the air silencer and install a k & n replacement filter and a cheap summit racing $29.00 muffler and exited it out the side before the tire with clamps from autozone.
my next mod will be underdrive pulleys then maybe some 4.30's
my next mod will be underdrive pulleys then maybe some 4.30's
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Joined: Nov 2005
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I've seen a thing on E-bay that goes just inside the air intake (after filter) that spins the air as it enters the engine. They claim you can get as much as 31% higher mileage. Don't know if it's crock or not but it's cheap and if you get 10% better it's worth it. If anyone else is familiar with this thing let us know.....Thanks Ed
P.S. I just bought a 2001 loaded Lariat 5.4 4X4 so I need to save gas too... : )
P.S. I just bought a 2001 loaded Lariat 5.4 4X4 so I need to save gas too... : )
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8018735658 is the item number. This auction claims up to 35% and the buy now price is 17.95. Talk about bang for the buck. But maybe it's a gimmick. I have no personal experience with this product...................................Regards Ed
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Junior User
Joined: Dec 2003
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From: Maine
I'm interested in the same thing. I'm looking at a used F250 with the 4.5 but will need to get the best mileage I can from it. A lot of people are telling me I will never do better than 10-12MPG. I'd like at least 15 over or more on trips and by the looks of a few of these posts it is possible. Any other info would be great.
Thanks,
Ken
Thanks,
Ken
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I have done alot of reading about the item on e-bay you are talking about; most of the opinions I have heard are that it is a sham, however I have no personal experience with the product. Regarding the underdrive pulleys, do they help that much, and if so, where did you get them from? Thanks.
Elder User
Joined: Nov 2005
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From: BC, Canada
I did install a K&N FIPK on my 02 F250 5.4 and I did notice a slightly better throttle response but not much increase in gas mileage. K&N claims a 10.9 HP increase at 4400 RPM but I don't think i've ever been able to make use of that. Does make a nice sound around 2000 RPM though, if you're into that kind of thing.
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Joined: Jan 2003
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From: PA
Originally Posted by Bronco532
I never really understood how underdrive pullies give you more power. Can someone explain that?
Signed,
Not the sharpest tool in the shed.
Signed,
Not the sharpest tool in the shed.
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Joined: Nov 2005
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good answer on the underdrive pullies. does this cause any performance problems on the systems that are not spinning as fast?
thanks for the follow up on the air spinner too
and schmidt, open that puppie up once in a while. let those ponies run
thanks for the follow up on the air spinner too
and schmidt, open that puppie up once in a while. let those ponies run
)