Quote:
Originally Posted by gbrettin
It seems like CAI is a big hoax. I'm pretty sure the engineers at Nissan calculated the air flow needed for this specific engine setup. Why wouldn't they use longer charge tubes if it offered better performance? I mean, this is a performance car after all.
I'm not trying to down anyone's mod btw. 5hp at top end rpm seems pretty minimal to me. Perhaps there is something I'm missing?
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Edit
I re-read. They claim 15hp gain. That's not too bad if it works.
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Well "seems" and "is" are two different things. CAI are dyno proven. Yes, it's closer to 15 (on a cold day without the front bumper and a big fan blowing on it but still...)
Anyway, there are a couple reasons why Nissan (or any other auto manufacturer) doesn't just go ahead and put long tubes all the way up into the front bumper or wheel well or wherever in order to squeeze out just a bit more horsepower. Cost is one. Hell.. cost is probably the reason the car didn't come with a stock oil cooler. Anyway the other thing is just general maintenence. Why would Nissan want to pull the front bumper every time they need to change out an air filter? A car is a car is a car and Nissan or anyone else isn't neccissarily looking to redesign the wheel when they are happy to present a car that makes 332 hp rather than 340 with the added headache of more wrench time for simple mundane maintenence tasks.
Typically speaking, a stock airbox is a "cold air" intake in terms of where it's drawing the air from and the fact that the stock airbox is shielding the actual intake from the hot air inside the enging compartment. The problem is the lousy tubing they generally use. It's rubber, rippled and usually has different changes in diameter up to the manifold. I agree that the JWT pop chargers look fantastic under the hood but I could care less about looks over power since I don't have a show car.