[cemDrymnVem]

If I altered the air box so that air would be forced into it, would that promote more hp/gas mileage than it is stock sucking air from the side?
This is in a F150 with a 351W V8.

Thanks

[VrQsgM7c]

Yes, it's called a Turbo Charger. I wouldn't recommend doing it yourself though. You can get better HP/gas mileage by purchasing a better air intake and swapping out the air filter for a K&N or other performance brand air filter. Note that this s different than turbo charging as turbo charging is forcing air into the engine. Adding a turbo into a vehicle can cost anywhere between $1,000 and $3,000 and requires a lot of work.

[Quaganoca]

i dont think hes talking about turbo charging his truck. he wants to cut up the air box to allow more air into it.

lots of people have tried this mod and the opinions on its effectiveness are varied. some claim a difference in power while others think its just a placebo effect from the increased noise opening up the air box creates.

in my opinion, the only way to add noticeable power would be to replace the entire intake system with a performance oriented one and a highflowing air filter (stay away from k&n as the oil has led to damaged maf sensors). even then the power added is very minimal. the easiest and cheapest way to add any significant power on your truck would be a supercharger.

[cemDrymnVem]

I am more worried about mpg than hp, but more HP would be nice

[Quaganoca]

well if thats the case i would leave the engine stock. just make sure to keep up with maitanence. air filter, plugs, wires, o2 sensors, anything that affects the performance of your engine. as well check your tire pressures (more pressure will help milage but may poorly affect tread wear), make sure you dont have any seized calipers, check alignment. also you can drive like a grandma, or sell your v8 powered hunk of ford and by a honda civic.

[Obsententicab]

well if thats the case i would leave the engine stock. just make sure to keep up with maitanence. air filter, plugs, wires, o2 sensors, anything that affects the performance of your engine. as well check your tire pressures (more pressure will help milage but may poorly affect tread wear), make sure you dont have any seized calipers, check alignment. also you can drive like a grandma, or sell your v8 powered hunk of ford and by a honda civic.

If selling it would help me buy a better car on gas I would have done it by now. As far as being a hunk of ford, it runs damn good considering it's almost 20 year old and only has 130K.

[uphokyhuP]

With something like that, there really isn't much that you can do to improve mileage.
I used to have a 5.7L 1990 Silverado. 14mpg not matter what I did. If I drove rough, 14mpg. If I babied it, 14mpg, if I idled like crazy, 14mpg, if I pulled moderate loads, 14mpg.
IMO, it is hard to get mileage up on any car that isn't forced induced. All you can really do is do basic maitanace, don't run A/C and check your tire pressure.

Plus it is all down to how you drive. In my moms van, I somehow pulled off 21mpg with a little a/c usage when that thing has never seen over 19mpg average in its life.

My truck, I somehow pulled off 30mpg that I have never seen again. Closest to it was 25mpg(S10)