I don't have a picture, but on my 90 F-150 w/351w, the engine is expected to suck in air through a horrible rectangular opening at the front of the hood that is about the size of a stack of post-it notes.

Without spending a couple hundred bucks on a K&N setup, what are some of you guys doing with either factory parts or building your own intake setups?

 

stock works just fine. just insulate it. and get a free flowing filter. my K&N didnt give me any better results than the stock intake, except it made the exhaust sound better.

 

Thanks.

Anyone else?

 

Yes. Leave the factory CAI in place & wrap it with foil-faced self-adhesive foam plumbing insulation. Drop in a K&N (none of that open-element crap) or some other reusable filter, and FOLLOW THE RECOMMENDED MAINTENANCE SCHEDULE.

The only mod you MIGHT do is swapping to a 4.9L/7.5L fresh-air duct (core support to air filter box), but there's really no point.

 

Thanks for the info guys.

 

Why insulate it?

 

To keep it from picking up underhood heat

 

Read the RESULTS pages:
http://www.performanceunlimited.com/projectmpg/

 

Steve pretty much hit the nail on the head.

 

what type of insulation would be best used to do this?

 

 

after reading this thread I did this a couple of days ago, I did the foil insulation on the larger hoses didnt have enough to do the airbox, but also dropped in an afe filter which is similar to K&N for 75$ all said and done I did notice a difference in throttle responsiveness and also I noticed when I have it on cruise at 100 km/hr but rpms drooped from about 1900 to around 1600, now I can cruise at 110 km/hr and get same milage as before at 100 km/hr

small difference but definitly works my truck is bone stock other then this I think allowing the exhaust to breath a bit better will improve this further.

pleased with this small mod

any other cheap mods like this??
Dan.

 

Sure - the cheapest: thorough regular maintenance.

 

you can install the air intake from an F-250 which moves the intake to the side of the radiator and opens the intake hole to 2 paks of smokes size. I posted this several years ago, even gave the part number. And yes, Steve is right...read the mpg thread. Saved me lots of money and the stuff works.

 

Thanks for the info.. checking the MPG site now. I could definitely use more