My .02 on open air box FIPK's
 

I hate to rehash this whole debate, but it seems my '99 has got a major kick in the ass lately. Why you ask?? Well its been really cool this past week up here in CT (50's)and the truck is pulling much harder than it ever did. I have made no mods to it in awhile so its gotta be the cool air. I really dont see how an open airbox sucking all that hot air from under the hood is doing any good. I have also noticed on my bike, although it is carburated, that it seems to run much better in cooler weather. Maybe Im drunk, but a noticable increase has got to be at least 10-15 hp. Any thoughts???

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1999 F150 4x4 XLT BLACK ORP 4.6 5 SPEED 3.55
LUND HOOD SHEILD
K&N
FLOWMASTER SERIES 40 SINGLE OUTLET
CAPTAIN CHAIRS
PIONEER 6815's(for now)
SUPERCHIP
AIRBOX MOD
WAAG BRUSH GUARD
SPIRALMAX
KENWOOD 9015
SUPERCHIP STICKERS
MTX THUNDERFORM
KICKER 240 AMP

I agree! 100%

I feel it everyday. I look forward to cooler nights! Just wait until it's 40deg outside!!!

Crash


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BLOWN 4.6 5-speed

Where we started.
After a facelift.
MAGNACHARGER!!!

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MAGNACHARGER
ALLEN

The temp in Albuquerque just went down
to about 60 and it does feel like it has 10
or 15 horsepower than it did just a day ago. I do have a open fipk and it doesn't seem to make a difference. It runs just as
well when it is cool outside as when it had the factory setup. The cool air gets under the hood too.

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98 F-150 4.6 Litre XLT2wd Ext. cab
prarie tan/tan int.
K/N gen.II fipk
custom dual exh/gibson rectangle tips
color matched snuglid
Superchip!!!
Westin nerfs blk powdercoat
Cobra 75WXST cb w/weather alert
Kenwood cd w/RS speakers,don't laugh it sounds pretty good
On the way/wheels,tires,air dam, etc..etc.......
doin the monochromatic boogie
on the front end.Billet grilles on order

98Screamer: Well, because you noticed no difference between factory and K&N when it was hot proves his point. You did have more air entering the engine, but it was hotter, therefore no gain. Now you have more air and its cool. And you said it feels like 10-15 hp gain. Seems to go along with the hot air robbing HP camp.

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2000 F150 XLT 4x4 Short Bed. Amazon Green, 5.4L, SuperCab, ORP, Tow Package, Sliding Rear Window, Electronic Shift, Keyless Entry, LT265-70-17 Tires, Clarion Pro Audio, Herculiner Bedliner, Air Silencer Removed.

1994 SVT Mustang Cobra. #1032 of 6009. Black coupe with black leather int., 3.73 rear, Bassani Exhaust, Aluminum D/S, Bridgestone RE-71 255-45-ZR17

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