Does anyone out there have any good recomendations for getting more horsepower out of the 4.6's? I've got dual exhaust and I've been thinking about trying a K&N filter and chip but will that really make that big of a difference? I've also thought about ramming out the cat's but I heard that could burn out a valve. The truck has good power but I want to buy a 4 place enclosed trailer for snowmobiles and I'm trying to figure out if the 4.6 will pull it or not. Thanks, -ZRracer

 

How much weight do you plan on pulling? If you chip it, its got to be the superchip, its the best.

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Fast46Triton

1999 Ford F150 XLT Supercab, Shortbed, 4x2, 4 wheel disc brakes/4 wheel Anti-Lock Brakes, Cloth Seats, Amazon green, 16" All season tires, Soft Tonneau Cover, CD Player, 4.6 liter Triton V8, 3:55 ls, towing package, 4 speed auto, K&N Airfilter
Future Mods:
1)Superchip
2)Airbox Mod
3)Gibson Exhaust

 

The total weight I'll be pulling is probably 4-5000 lbs. The truck is a 98' F-150 Off Road, extended Cab. No big changes to the truck yet besides the exhaust which is a single Glasspack, pipes straight out the back with 4" tips.

 

I have many mods to my motor and the K&N filtercharger helps out soooo much. Make sure you are getting the filtercharger and not just a cone filter that goes in the stock air box. I also put on JBA headers, superchip, and 3" pipes catback. That combo pulled out about another 50 to 60 horsepower out of my truck. You also might want to look into getting your truck regeared. I went from the stock 3.55 to 4.56 and that made a huge difference also, but my truck is also pulling 35" tires. Hope I helped you out.

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98 supercab styleside
9.5" lift
35" tires
K&N filtercharger
JBA headers
3" catback pipes
duel chamber flowmaster
4.56 gears
superchip
I am not only big and loud I am fast too. I do a 16.35@87.5 in the 1/4 mile. And i can only get faster.

 

The K&N air filter is the first mod I did to my truck... What I think BIGandFAST is talking about though the a FIPK (Fuel Injection Performance Kit) because just the air filter is called the filtercharging kit. I don't have the FIPK, what I did instead was remove the silencer from the airbox, add the K&N airfilter and did chopped the air filter compartment to expose the small half of the filter completely in the engine compartment. It basically does the same same thing as the FIPK.

cd

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Silver 99 F150 XLT Sport Extended Cab with Flare Sides...
Mods: K&N Air Filter, Tinted Side Windows, Reese Class 3, Alpine Deck & Subwoofer Processor, Zapco AG350 Amp, JL 10W0 (times 3)
Coming soon: Spray-On Bed Liner, Fiberglass Tonneau Cover

 

This may be total BS, so humor me for a moment. The owner of a local muffler shop told me that with most new vehicles adding anything to try and increase horpower/torque in the exhaust system was a waste of time unless the computer was reprogrammed and the MAS was modified. Does this have any hint of truth in it? After hearing this, it definitely seemed reasonable to me. And if it is true, are there any aftermarket mods for the MAS?

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1999 F150 Lariat 4x4
SC SWB Styleside
5.4L 3.55ls
Oxford White

 

What BigAndFast has, is probably the cheapest mods youll get. Then you'll get into NOS, Superchargers, etc. $$$$$

 

BigandFast: where can we get a look at that bad boy? The 9.5" lift and 35" tires must make that truck look awesome.

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'97 F150 Lariat, Flareside, white/sliver, SC, ORP, 5.4 (FQR), Mods: 305/70/16 GY ATS, AR Baja wheels, dual exhaust, Smittybilt Nerf Bars, Edelbrock IAS Shocks, K&N Filter, Carbon Fiber Bug Gaurd and rigged the fog lights too.

 

The superchip will make a difference, I have basically same truck as you 'cept mine is a 97. I also put in Bosch+4 plugs, not much difference until I changed plug wires. I put on MSD 8.5mm super conductor wires and there is definitely more power. My next mod will be an airaid, waiting to save a little extra cash and find it cheaper than $199. I also agree with bigandfast, changing gears will make a huge difference. I plan on changing to 4.10's with 33" tires and then the supercharger!

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97 F-150 S/C 4x4 ORP XLT 4.6 K&N , Flowmaster, Bosch+4 plugs,MSD 8.5 wires,Superchip.Patriot fiberglass toneau cover, Westin chrome step bars.
Future mods:4" lift,ram air hood,and a supercharger.

 

Sapo,

Well, yea, it is partly BS and some not. It just goes to show you a little knowledge is dangerous. The problem with his theory is that with these newer trucks the computer has the ability to re-program (relearn) istself after these mods. He is thinking of older computer systems without adaptive learning abiliites. However the additonal changes he says like the mas mod will help as well. I am always skeptical of the aftermarket manufacturers claims from most mods but they do indeed equal some gains most of the time.

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97 F-150 SC Lariat, Styleside, White over gold, 4.6L (Windsor) automatic, 3.55 rear end, electronic 4X4, w/ every option of Lariat and ORP packages except the 17" wheels and the 4X4 decals, MOD so far= K&N air box mod, Gibson Super Truck, clear Bugflector II, Leer TSC 600 hard cover, Bridgestone Dueler OWL ATP 265/75 R-16's, TrailMaster VVS shocks, Smittybilt step bars, Ford moulded mud guards, "White-white" head lamps.

 

what is the MAS? are you referring to the mass air flow sensor?

this is my understanding of what the MAF does:

It senses the temperature of the air coming, and the current temperature outside, and based on this information, mixes the air and the fuel ratio for injection for best performance. If you put in a computer chip which advances the spark, changes your shift points, it should have ZERO impact on the MAF and you should get the gains.

the MAF doesn't care what the air-flow intake is, simply because if you are driving 5 miles per hour, you get less air then if you are driving at 100, and the MAF works in either case so increasing your air does not affect the MAF, and does give you a performance gain.

for more information on the maf, see:
http://www.cyntec.com/index/thin/sf.html

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David
'99 F150 XLT SC, STYLESIDE
3.73, 4X4 ORP 5.4L, AUTO,
139wb, Medium Red Tor.,
Rhino, K&N, BugGuard,
RainGuards, Superchip
f150online sticker!!! GET ONE NOW!

 

wolvrin704 Where did you get the MSD 8.5's I have been looking for a set. Any info on the cost and how the install went would be appreciated.

Thanks.

 

Cloaker,

Yes, I assumed he was talking MAS as the same as MAF (I have always mistakenly called it the MAS too). I was not assuming a Superchip however. One correction to your assumption. The MAF (located on the throttle body) does not measure the temperature of the air only the volume coming in and then it sends it to the computer. The IAT (intake air temperature sensor located in the air intake tube) measures the temperature. Seperate controls and sensors for each purpose. I am under the understanding that you can change the MAF (MAS) and force (fool?) the computer to allow the engine to take more air in. I guess, sort of "supercharging" it so to speak. I could be wrong about that last part.

 

You should try an E-fan and underdrive pullies.

 

10 year old thread.