I don't have a 5.4, but from what I've read on this board the HP claims are probably pretty close or only slighlty exagerated. All these mods are popular - although probably not that many go for the headers,too.

I am skeptical about the mileage claims.

Make sure the chip included is a Superchip, as some of the other brands only increase power at wide open throttle. The superchip also improves automatic shifting a bunch!

Yes, the chips will require premium fuel.

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1999 XLT S/C, 4.2 V-6, auto, 3.55 rear, dark torreador red/harvest gold, bed liner, Sony 10 disc CD, Edelbrock IAS, K&N filter, Superchip

 

That's only a good deal if its a good chip. The claims are, of couse, best case scenarios, so I would only expect about 80% of their claims in the real world. Find out about the chip and if it's a Superchip (not SuperChip), or even a Hypertech, it may be a pretty good deal. Whatever you do, make sure it is not a Jet chip.

 

Have seen performance combos packages in the 4X4 magazines offering a significant increase in HP/Torque/Milage. The two that catch my are:

55 HP/50 Torque/20% milage increase: Gibson exhaust, Chip, and Gen. II K&N air filter starting at $499.99

70 HP/95 Tourque/25% milage increase: Headers, Gibson exhaust, Chip and Gen. II K&N air filter starting at $799.99

Understanding these are max gains based on the vehicle/engine, I'm curious why these are not more popular. Seems like a lot of "uumph" for the money. Considering gas prices, seems as though the milage gain would in turn pay for the package? Especially interesting is the milage gains.

For a 5.4L Ford (again, actual gains may vary) the second package would create 330 HP/445 Tourque/16 city - 21 higway milage.

That's a lot of bang for the buck even if the starting at price increased by a few hundred.

Questions:

Has anyone purchased, and if so, seen comparative increases as compared to advertised increases?

From my reading, the chip would require use of super unleaded?

Will these mods make California emission standards unattainable?



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Deep Wedgewood Blue 4X4 SuperCrew. 5.4, 3.55 LS, 17" R/T, Skid Plates, Tow Package, Sliding Glass

 

USAF K9

If you don't mind advice from a retired Navy F150 owner, you can order your own unique set up for about the same bucks. Everyone is right about the Superchip! See my signature for my mods. Great performance improvement. Airaid, Superchip, and flowmaster cost me about $675. Hope this helps.

WarEagle

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98 F150 Lariat extended cab, Pacific Green/Silver Frost,
Grey Leather Capt chairs, AM/FM/Cass/6-cd changer,
full tint, color matched bug deflector, vent shades,
A.R.E. hard bed cover, Ultra type 50 polished wheels,
BF Goodrich 315 55R x 16 Sport Truck Radial T/As, 4.6L,
AT, Towing Package, Airaid, Superchip, Flowmaster dual
exhaust, Flowmaster 50 series muffler, 3.55 gears

 

You can haggle with some of those prices they offer I did but decided on the superchip instead,Payed $230 chip,$259. Gibson dual rear,$60 tips,$185 K&N fipk with cleaner all prices shipped to my door and installed by me.Total $734. Started with 99 5.4 260 HP not sure what it is now but definately a lot quicker and meaner.If you purchase in peices I think most members would agree on chip then air then exhaust.

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99 F250 XLT LD 4X4 S/C,5.4,3.73 Limited slip,Bright red clearcoat ,4whl abs,remote start w/keyless entry and alarm,chrome rims,tinted,westin nerf bars,factory tonneau,superchip,K&NGen II fipk,pioneer in dash cd,pioneer amp,infinity kappas all around,Lund front runner bug sheild.Gibson split rear,stull SS grilles.

 

forget about milage increase If you got it you flaunt it! trust me...look at my sig...

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JAMES PATRICK MCGUIGAN
98 Lariat 5.4 4X4 SC SB Tow ORP
Superchipped!
K&N
WMS Velocity tube
Gibson Sport Truck exhaust
Edelbrock IAS
JBA Headers
Clear front corners
16X8 Centerline Billet Wheels 285 75 16 BFG AT's

jimmac@ismi.net

 

I would guess the advertisements you were looking at are from a place called Ultra Performance. Their store is just a few miles from my home and I had them install my Gibson exhaust. I talked to a couple of guys that work their was told about dyno testing of installed parts. They have an impressive store display of wheel/tire combo's as well as performance parts for cars and trucks.

Before you spend your money you might contact them to see how the numbers were developed.


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97 F-150, 2WD, Reg Cab,Flareside,Dk Toreador Red, Windsor 4.6, Magnecor 8.5mm wires, Bosch Plat +4s, 3.55 LS, EGR Bug Deflector, ******* Bed Cover, Bed Liner, XL Full Length Running Boards, Air Aid Kit, Gibson Single Out Cat Back, Superchips, TransGo Shift Kit, Hellwig Rear Sway Bar, Hellwig 2500# Overload Springs

 

I installed the Superchip, then the FIPK, then the Gibson cat-back. You'll notice a definite difference in the seat-of-your-pants test. Most of it came after installing the chip though. My gas mileage is 11-12 City and 14-15 Hwy. I'm not sure, but I think mileage worsened after the cat-back installation. I've seen others mention the same thing before. But, then again, it does weigh 5500lbs with me in it, so what can I expect in mileage? I'm happy with it.

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99 F150XLT S/C Flareside 4x4 ORP 5.4L 3.73 Oxford White, Tow, Power Captain's chairs, Ford nerf bars, Longtek grill guard, Superchip, K&N FIPK, Gibson 3" single rear side-swept cat-back, Code Alarm 2100