i thought our cars have closed-loop fuel maps or whatever so it wouldn't be affected by induction temps? Im not 100% sure i just think i heard that more than a few times in the past

Also Short Ram intakes probably sucked alot for old-school hondas but does anyone notice that our cars are different? In an old short ram system, the filter was routed right next to the headers, SUPER heat soak. But our cars have the newer reversed header/intake manifold style like the K20/K24 "opposite" to how it was back in the older hondas. I believe there is wayy less heat than before. Also right below where a short ram sits, at least for manual tranny is the open road so im sure semi-cool air at least is going into our short rams

 

oh, i totally believe in the hot air intake!! im not gonna do it, but it works for those who DO use it

 

I was going to buy a K&N drop in filter until I found this website.
Air Filter Filtration Test

I'll sacrifice a small gain in HP at high RPM for less dirt getting into my engine.

 

Now THAT is a very interesting and informative write-up. Thanks for the link!

However, I must say, when I ran my Mini's intake (which I'm sure filter worse than all those drop-ins), after over 20k miles, I never had a single engine problem.

So I am still looking for the highest mpg filter.

Edit: after a quick google search of keywords ihadnt previously tried, I found this small filter test for mileage: http://www.metrompg.com/posts/air-filter-part-1.htm
Stock drop-in filters are slightly better for mileage, but with the mony saved from not having to replace the K&N as much, I will be going with that.

 

On my MK3 GTI, I had a Neuspeed SRI. I had to switch to the stock box, and when I did, I lost 2 mpg. Never changed my driving habit that time either. On my first car, an NA Miata, I had a Racing Beat HAI, and I got craptastic gas mileage.

On my Yaris, I'm still on the stock air box, and never got around to getting an aftermarket intake on it yet.

 

i dont think the stock box is geared towards performance. It's probably optimised for the best throttle response, decent power, and quiet operation.

 

Interesting posts, but the one from the Tundra forums doesn't strike me as being particularly accurate.

When's the last time you stuck your hand in the engine bay while driving at speed? An engine bay does get a significant amount of fresh air - CAI designs for the Fit put the filter down in front of the transmission, and (in theory) capitalize on that. And the actual vacuum created by the intake as the ingests air pulls more fresh air into the engine bay from what's passing underneath it.

Our stock does, indeed, pull cold air from inside the fender. But have you looked at how large the hole is that it pulls from?

Easy, the manufacturer has to be concerned about noise reduction and hydrolock prevention. As enthusiasts, our priorities are probably going to differ from theirs.

He said it himself - hydrolock is a huge concern for them. They need to have a system that's as foolproof as possible for people who will do incredibly stupid things with their car. Placing the air inlet lower to the ground is a risk we're taking - we just have to be aware that driving through foot deep water will be dangerous (not that it isn't ill advised aside from intake concerns).

But the biggest improvement in efficiency in an aftermarket intake isn't necessarily related to the air temperature - it's in the reduction of pumping losses. Every time a piston goes downwards to pull air through the intake valve, it's using energy to do so. So by providing a better sized tube and freer flowing filter to breathe through, it has to do less work to pull in the air it needs. Again, have you guys looked at how tiny stock airbox's inlet is?

 

I think I'm just going to have to spend the money sometime down the road to figure it out for myself, and then do a write-up on it. I will not purchase a name brand one, when I can get one from Shucks. I know the more expensive ones are more resistant to heat, but I won't exacty be putting my car thru strenuous activities.