Hi there, i saw your reply to the k/n filter form.and i would like to know if the fuel milage has inproved using the k/n filter.becouse my fuel milage really is down the drain on my 97 f 150 4x4,about 500 km on a tank,(what would your be before and after) .i would to find out if that consumption is normal,and thanks in adwants

 

>[font size="1" color="#FF0000"]LAST EDITED ON 26-Jul-00 AT
>10:34 PM (EST)[/font]
>
>98 F-150 XLT,245 70 yokahama AVS/ST's
>prarie tan w/tan int.
>K/N gen.II fipk
>B/M electronic shift improver
>COBRA 75 remote mount CB with weather alert
>SNUGTOP LID/body color
>4.6 litre V-8
>
>I have as you can see,a K/N fipk and it really seems to
>boost the seat of the pants fun. once I
>dualed the exhaust out it was way more noticeable.
>Plus the sound is incredible,sounds like a late
>60's muscle car with the secondaries wide open.
> Try rigging an intake for it(don't know if they
>are available for that year) and get rid of the
>stock silencer type air box. I'm on the road for
>now but I plan to build an intake improvement on
>my 86 conversion van when I get home. The stock
>one on the van sucks in air from the rad. support
>routes it all the way back past the fire wall then
>it passes through the filter and back all the way
>to the front of the engine. the intake changes
>direction about 4 to 5 times before it ever reaches
>the throttle body! no wonder the poor van accelerates so
>slowly.


First of all, what tranny do you have. I assume that because you have the 4.6 (like my truck) that you have the 4r70w. Where did you get the shift improver, what did it do for the tranny, and how much did it cost you. I have yet to find a shift improver for my truck so if you have the 4r70w, It'll really make my day



Also, what type of system are you running for the duals?

 

I put a K&N FIPK on a 2002 F150 4.6L auto supercab with the 3.08 axle. I don't seem to get higher gas mileage - the best is usually around 19-20 on the highway, which is the EPA rating. However, I don't seem to get really low mileage anymore - I used to get 15 or 16 MPG around town or mixed driving, now it never seems to go below 17. I also tend to get the higher numbers more consistently.

If there's a headwind or hills, the mileage drops 1-2 MPG - that's probably because of the diff ratio. I don't recommend the 3.08 axle.

I didn't really get more power, but my truck runs such low RPM's that it's not really in the range for a power increase. I usually run about 1900 RPM at 75 MPH. And yes, it downshifts a lot.

What you really notice is the throttle response - the truck really picks up when I step on it. It's a lot more fun to drive, and that made the kit worth $228.

I just my kit in a few months ago - the kit includes a modification in case you get whistling. It looked like something K&N put in after the original design. I didn't put the mod on, and mine doesn't whistle ever. But when I get above 2500 RPM, I get a great roaring sound out of the engine.