I really like that dry ice idea. I've been toying around with a cold
air pipe idea ever since I had my Stang. I thought about coiling up
copper or aluminum tube inside the air tube and have ice water pumped
through it, requiring a water tank and pump. But, to have effective
cooling of the air, a high surface area is needed, hence the use of
radiator-sytle cores in intercoolers. The air going through the air
intake tube is very high velocity. Because I am a mechanical engineer
who designs HVAC systems for buildings, I got this nifty "Duculator"
that gives velocity and CFM at a given pipe diameter and static
pressure loss. For a 3" dia. tube, 600 cfm has a velocity of 12000
feet per minute!! To give you a reference, most air passing through a
duct in your office has a velocity of around 600-1000 fpm. So, this
air in the intake tube is going 2.4 miles a minute or 144 mph! This
is a concern to the surface area of the cold surface because fast
moving air over a cold surface does not transfer as much heat as does
slower moving air. This is because the moisture doesn't have enough
time to condense out of the air (latent cooling). When air is cooled,
moisture condenses out, lowering humidity. If you can't get the
moisture out, it's not going to be as cool. Soooo, I think the dry ice
may work on the Quick D, because it can literally freeze the tube and
you have a higher temperature differential, which is always better for
cooling. Zig-zagging an a/c coil in the airbox won't do much because
they isn't enough surface area. If the air went through a dense rad
core, it would work better.
I remeber a few years back, a company made an air tube for 5.0 Stangs
that hooked up to your a/c lines. Not sure if there was anything
inside the tube, but it used the freon to cool the tube. Normally
aspirated applications got a claimed hp increase of 12. Supercharged
were higher, but that is obvious because your're increasing the volume
of air alot. Man, too much typing!
Chad Niwranski
99 CC Black/agate
Abbotsford, BC
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:14:58 EDT