Yo Slick, You can hear this noise over your killer exhaust system?

Does it happen at all RPM's? OR just one specific area?


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2000 Navigator. Laser Red, Every option. ,K&N FIPK , Superchip, True Duel Flowmaster 50 series. 2X SISO , vented out each side. Rear air deflector, Bug deflector, PIAA, headlights (SUPERWHITE)

Looking at Hitting 400 Hp without a blower. Using in addition, headers and duel CatBack. (If possible)
(Waiting for JBA to develope Headers)

“91” F150 4X4 Shorty “Ultimate Off Road Edition” Borge Warner T18 4 speed, Traction Lock Front and Rear Differentials., Smitty Built Duel Tube Roll Bar, Moog Super Off Road Coil Springs, Factory 2” Lift Rancho RS 9000 Shocks , Stock Front “QUAD SETUP” 33x12.5 (B.F. Goodrich) Mud Terrain Warn Winch Combo Bush Bar with Warn XD9000I Winch. Full Factory Skid Plates. 302 Long Block, K&N FIPK JBA Chrome Headers, Custom Catback using Flowmaster Muffler, Duel out side behind rear wheel.




[This message has been edited by LaserNAV (edited 11-17-2000).]

 

It's normal. It should sound like a snake hissing and the suction is normal also.

I wondered the same thing when I installed mine. You get used to it.

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2001 Bright Red Supercrew
4X4
5.4 V8

Mods:
BFGoodrich TA KO 285/75/16
Airforce One intake kit
Exhaust: Hooker AeroChamber Muffler, SI/DO
Rhino Liner (Planned)
Catch-All Floor Mats (Planned)

Go Buckeyes!

 

Has anyone noticed how loud the K&N FIPK is on a 5.4? It sounds like a swarm of Locus when driving under normal throttle. I've checked (and re-checked) all vacuum hoses and all are tight. Put my ear to the filter, and it appears all the noise is coming from the tube via the filter. Was wondering if others noticed this or if I've done someting wrong on the install. Oh yea, when I turn the ignition off, I hear a suction noise lasting about 2-3 seconds after the engine has stopped?

Thanks,
SlickWilly2

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99 F-150 5.4L 4x2 Supercab Flairside Lariat, Amazon Green 2-tone, Bed Rails, Ford Bed Liner, K&N FIPK, Flowmaster Force II Exhaust System

 

dont worry bout the noise thats suppose to happen. the reason your hearin that is because a K&N FIPK was designed to give u more air to the engine right? well that sound your hearin is just how hard the air is bein sucked in. thats a good thing. the reason u didnt hear it with the old intake was because u had that condom over the air filter and it restricted it soo much it wasnt funny. the noise is a small price to pay for the gains u recieved im sure! all that means is u need a louder exhaust so u can hear the pipes rumblin and it will take your mind off the intake. ford15098

 

Then, a loud music system to keep your senses out of the exhaust.

I had the same experience with my K&N, sounds like a snake sometimes at idle and the suction noise when turning the ignition off is there. But man,... it growls under acceleration and you know that.

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My Ride: 1998 F150 4x4 Lariat Supercab Flareside 5.4L in Oxford White/gold, ORP, Tow Package, 3.55 Gears.

Modifications: K&N FIPK, Stepshield door sill protectors, Performance Accesories 3" body lift, Lift Lips, Gabriel Gas Ryder LT VST Shocks, Daystar front anti-sway bar polyurethane bushings and 35x12.5R16.5LT BFG All Terrain KO's on 16.5x9.75 American Eagle 589's.

Photos at: http://www.communicomgroup.com/jmtruck

 

Thanks everyone - The snake-like noise is a small price to pay for the increased performance, and it does sound good under FOT (like when we used to flip the top of the carb housing on the old 4-barrel). The Flowmaster Force II exhaust could probably be a little more aggressive, but it does drown out the snake sound under throttle.

LaserNav - JBA headers go in this week, arrived at the door on Friday. Ordered SuperChip to go in a week or two later. How's the SuperChip working with your mods?

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99 F-150 5.4L 4x2 Supercab Flairside Lariat, Amazon Green 2-tone, Bed Rails, Ford Bed Liner, K&N FIPK, Flowmaster Force II Exhaust System

 

SlickWilly2,


"like when we used to flip the top of the carb housing on the old 4-barrel"

I'm glad to know I am not the only one here old enough to have done that.

When my Dad rode in my 73 Challenger the first time he asked me what that sucking sound was. I remember telling him "that those Holleys carbs needs to breathe" He never understood why that was music to my ears.




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2001 F-150 SuperCrew Lariat
Deep Wedgewood Blue
5.4 Engine
3.55 Limited Slip
Towing Group
Cargo Bed Extender
6-Disc C.D. Changer
Ford Chrome Nerf Bars
AR Nitro 16x8 Chrome wheels
BFG 285/75/16 AT KOs

http://albums.photopoint.com/j/AlbumIndex?u=1342468&a=9989751

 

I agree "mellower"; I installed the K&N FIPK recently, it is nice, and louder, but nothing like a "flipped lid" on a large cube Quadrajet. The performance increase was very noticeable and the combined sound of intake and exhaust is very sweet and menacing.

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2000 F-150 XL, RC, LB, 5.4L, 4R70W, 3.55LS,
Class III tow, Payload #3, & Convenience pkgs.,
4-wheel disc/ABS, Chestnut/Parchment 40/60,
Ford bedliner w/Paintsaver & gas/wheel/spare locks,
K&N F.I.P.K. w/Outwears pre-filter, Superchip,
Dynomax ultra-flow welded 3" cat-back w/ 3" Y-pipe,
Hellwig front & rear anti-sway bars, Rancho RS 9000s,
Mobil 1, K&N oil filter.

 

I know this is an old subject but I just installed an Airaid FIPK on my stock 2000 Expedition. I still sounds stock at idle and normal driving but when I romp on it it sounds a little mellower than what was described as "back when we flipped the top".

I understand the K&N has a plastic tube. The Airaid is a very nice solid installing kit with an aluminum tube. That could be part of the difference in external sound.

I'm doing a mellow sounding cat back next. They should complement each other nicely, especaily when I feel like getting into the chip....

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2000 Expedition Eddie Bauer 4x2
Estate Green
5.4 ltr
3:55 LS rear
Tow Package
Superchip
Airaid FIPK
Rear Load Leveling
Moonroof
Century Child Seat!