drop in filter vs cold air intake vs stock air box

[Gripenfelter]

Anyone notice a difference in hp or fuel economy between the drop in filter and a cold air intake vs stock air box?

[GrnMchn]

I noticed a difference on a LT1 camaro I used to have with a cold air kit that took air from the front bumper.

 

On my old tacoma and current pathfinder I just droped in a K&N and drill a 4" hole in the front of the airbox and put in a deck plate from a marine suply store so it can be closed up if needed. I'm sure it flows very close to a expensive intake but there is very little HP and fuel economy gain.

 

I also have a Lexus SC400 and the stock airbox with holes and a few plates to block hot air from the engine gives more HP than the expensive cone filter kits.

[Gripenfelter]

I noticed a difference on a LT1 camaro I used to have with a cold air kit that took air from the front bumper.

 

On my old tacoma and current pathfinder I just droped in a K&N and drill a 4" hole in the front of the airbox and put in a deck plate from a marine suply store so it can be closed up if needed. I'm sure it flows very close to a expensive intake but there is very little HP and fuel economy gain.

 

I also have a Lexus SC400 and the stock airbox with holes and a few plates to block hot air from the engine gives more HP than the expensive cone filter kits.

Funny you should mention cutting up the airbox. I just did that an hour ago.

 

Yes in the LT1 Camaro you need a CAI because the stock piping is so restrictive.

 

I need to design something for my '98 Maxima now.

[RWC5S2]

I went to Pep-Boys and bought a K&N look-a-like cone filter plus the 3" adapter plate, pulled the OEM air filter and box from my 2003 Pathfinder and put the look-a-like filter in. I have gone thru 3 tanks of gas since then and achieved a whopping 1.2mpg increase. Not too significant but, it beats the heck out of only 13mpg.

[nissandoms47]

man your mileage sucks.

[RWC5S2]

Ya think? I can get 15 or just better on the road but in town sucks the big one. I really lost the mpg with the 33's I put on. Plus, the KMA front bumper is kinda heavy. Oh well, at least it ain't a grocery getter any more.

[nissandoms47]

lol, i bet you would gain a lot of performance back with some 4.6 gears.