I have a '97 F-150, 4WD, Lariat. Mods to date are a: K&N FIPK, Superchip and a Flowmaster Delta 40 series.
Mike Troyer has already told me that the Gibson sideswept is a better choice, but the Fmaster is brand new - certainly not trash material yet.
Need to know what addtl parts I can look at to compliment the existing mods and re-gain my low end.
Suggestions?

 

Hi Pete N

You are on the right track with the modifications you have so far, to get your low end power back replace the factory Y pipe on your exhaust, you will gain a noticable amount in the low end as well as the mid range.
Hope this helps, any more questions just ask.

Larry.

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2001 F150 supercab short bed. Modifications so far, k/n fipk, 40 series flowmaster, flowmaster Y collector, electric cooling fans, Bauman shift kit, underdrive pulleys, with more to come.

 

Also, try adding pulleys and possibly an electric fan. Pulleys are cheap for the power gains; about $10 per horse... $85-100 for a set and gains of 8-15 horses. Fans open about 10-15 horses and can be had for anywhere from $120-$300. You could also consider some headers, or possibly a new throttle body.

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1998 F-150 Lariat SC
Toreador Red w/ Harvest Gold Trim around bottom
5.4L SOHC Triton V-8
K&N Filtercharger
4x4; 3.55 LS; Off Road Pkg.; 17" wheels; 4x4 shifter ON THE FLOOR WHERE IT SHOULD BE
Bridgestone Dueler AT/S
Chrome Brush Guard w/2 Pilot 55w halogen driving lights
Chrome Double/Single Roll bar w/4 100w Eagle Eye Off road lights
Ford Insignia mud flaps
Flowmaster Cat-Back Duals w/2 chamber mufflers
GTS Headlight & Taillight Covers
Ventvisors
Hella Dual Trumpet horns
6-disc CD changer
Red interior lights
Uniden 40 Ch. CB Radio
"Her name is Jasmine!"

 

With your intake and exhaust I could see losing low end, but didnt you gain that back and more with the superchip?

 

Pete N. - I've found that it's not so much the muffler you choose that effects low end loss as the diameter of exit pipe (pipes). Bigger pipes give you better performance at high rpms, smaller diameter pipes give better low end torgue. I've never lost LET from improved air intake and certainly not from a Superchip so I'd be looking at pipe size.
Wynder
2001 Ex. cab
5.4 L, Superchip
Mod. air intake, Superchip

 

No. I noticed zero difference with the chip. At idle (parked) when I gun it, it initially (for a second or so) sounds like its suckin air. The mid and high ranges are good.
No affect w/the chip.

 

Hey Pete thanks for the info. I have a single 3" into a Z33 ravin with two 2.5" out. I also have the AF1 intake. I've been debating on a superchip because I feel, like Winder says, that Ive lost low end. (high end is nice). I was thinking the chip would replace all that and more. . Now instead maybe I will just get my exits changed to 2.25" ea.. thanks for the info. Let me know what you do with other mods and what else you find out. thanks!