Best Cai
06-27-2006, 03:54 PM
#1
1st Gear Member
Thread Starter
Join Date: Nov 2005
Location:
Posts: 71
Best Cai
Does anyone have any documentation on WHP for different CAI'S I have a mac and I am not happy with it I have a slight bog on takeoff and parkway entrance form a roll. I was either thinking about the Demolet or the C & L. Any response would be helpful.
06-27-2006, 04:12 PM
#2
3rd Gear Member
Join Date: Jun 2006
Location: michigan
Posts: 674
RE: Best Cai
no docs but I have a one from S&b that is a molded plastic tube. I am not happy with it because it does not seal off the hot air from the engine compartment and the tube itself gets really hot, probally ruining any gain. It cost 200 so I got what I paid for.
[IMG]local://upfiles/41550/E5BA892FC5074C779567CCFF7B3D8BBA.jpg[/IMG]
[IMG]local://upfiles/41550/E5BA892FC5074C779567CCFF7B3D8BBA.jpg[/IMG]
06-27-2006, 05:14 PM
#8
6th Gear Member
Join Date: Jul 2005
Posts: 5,172
RE: Best Cai
ORIGINAL: afixer
i would ask lx200 he seams to have all the answers regarding CAI's and tuners. i had the AFE till the sc install and was happy with it. the tuners is a must no matter what CAI you have.
i would ask lx200 he seams to have all the answers regarding CAI's and tuners. i had the AFE till the sc install and was happy with it. the tuners is a must no matter what CAI you have.
06-27-2006, 07:21 PM
#10
4th Gear Member
Join Date: Apr 2006
Location:
Posts: 1,268
RE: Best Cai
One question I have always wondered is this.... how much of the gain from a CAI comes form the fact that the air is marginally cooler, and how much comes from the fact that the large pleated filter has much greater surface area, and therefore much lower pressure drop, so more air can flow into the engine while the intake valve is open.... Both temperature and massflow make a difference, and it seems temperature would really be a small difference...
if you compare how many air molecules are in air at one temp vs. another, you have to use a themodynamic temperature scale like Rankine. So if the air under the hood was normally 110 degrees, but the cold air unit delivered it at 15 degrees cooler, then the gain in air molecules would be
In Rankine, 110 F = 570 and 95 F = 555, so, you would expect 570/555 increase in O2 molecules or a 2.7% increase in O2 molecules. Dunno... this can't be it, right? Even if the CAI causes a 30 degree drop, you are looking at a 5.5% increase. If all those molecules were completely turned into a HP advantage, you would expect an increase of about 5 HP at 15 degree advantage, and 10 HP at 30 degrees advantage, at the flywheel.
ANYBODY know how much these units ACTUALLY cut the temperature??? Especially the C&L which has a metal duct running to the throttle body... I imagine this must work well as a heat exchanger!
if you compare how many air molecules are in air at one temp vs. another, you have to use a themodynamic temperature scale like Rankine. So if the air under the hood was normally 110 degrees, but the cold air unit delivered it at 15 degrees cooler, then the gain in air molecules would be
In Rankine, 110 F = 570 and 95 F = 555, so, you would expect 570/555 increase in O2 molecules or a 2.7% increase in O2 molecules. Dunno... this can't be it, right? Even if the CAI causes a 30 degree drop, you are looking at a 5.5% increase. If all those molecules were completely turned into a HP advantage, you would expect an increase of about 5 HP at 15 degree advantage, and 10 HP at 30 degrees advantage, at the flywheel.
ANYBODY know how much these units ACTUALLY cut the temperature??? Especially the C&L which has a metal duct running to the throttle body... I imagine this must work well as a heat exchanger!