Originally Posted by lowriderdog37

I have actually studying that lately. I wasn't going to post about it until I had more definitive results, but since we are talking about it, I'll give you what I know so far. I have been doing all of this at 90-95* ambient temp, medium traffic on surface streets (red light to red light). I don't live in a city big enough to have to deal with gridlock, however I have been in it, and seen my car get SUCKED of power when it's hot and I am in the middle of traf****.

Engine bay: about 5-8* warmer than ambient. After sitting at a few consecutive red lights, temp was up to 110-115*. Temp was back to 5-8* above ambient after about 25 seconds.

Inside the u-turn: I start the car (when cold), and keep moving for about 15 mi before getting to traffic, doing this, the temp stays right at ambient. After a few red lights, temp soared to 125-130*. The temp was still raising, but I was out of traffic by this time, took a 12 mi drive on the freeway, and the temp only dropped to 109*. I have only been able to test inside the u-turn once, but I am still testing. I'll post more info when I get it.

I am hypothesizing that the temp will raise much higher in the stock filter setup before leveling out. I didn't think originally that the tin airbox would be able to keep the cold intake worth keeping.

I started working on this not to prove anybody wrong or to get better performance, but I wanted to get the best possible replacement for the stock box. My stock box vibrates and rattles on the side of the compartment, which pierced a hole in it. The u-turn also doesn't fit properly, I am sure it allows unfiltered air into the turbo.