I've had a 2 1/2" hose from the front bumper to the air filter for almost a year and know it works great, although it'll never show up on a dyno. (Pics in my sig.) Tips for better hose clearance up through the fenderwell:
1) Add an extra 1/2" slot to the fenderliner screw hole in front of strut where it holds to the fenderwell. Provides more room for hose.
2) Instead of bending the fenderwell brace, use a dremel and a grinding bit to cut an arch into the inside edge. The brace will still be about 75% there, but the hose will be able to fit up to the engine bay opening without getting crimped.
Remove the DS tire and several fenderliner screws to give youself some working room. You can also remove the turn signal to get a good view of the tight spots. This is a great mod as the guys at BAT realized, and decided to market a product.
Stalling seems to be caused by air turbulence from direct air feed to inner cone and MAF. I cured problem 2 different ways:
- With a 1/8" sheet of foam rubber over hose outlet to inner air filter cone.
or
- Leave about a 1/4" inch space between the inner cone inlet and the cold air hose. You still get most of the cold air but not enough pressured turbulence to screw up the MAF readings.
Early setup of no-stall cold air intake
