Radiator ducting

[vex]

So I've heard a bunch of a different things about this. I am looking for material or basics on radiator ducting. In particular the intake port size based on radiator size. I have heard everything from 25% area, 33% area, or 1/6 the height of the radiator. Another thing I'm curious about would it be more effective to duct directly through an intercooler to oil cooler and finally to a radiator or if it would be more effective to duct the intercooler and oil cooler and plumb fresh air through a scoop?

Here's a digital mock up of my particular setup and a possible version with a scoop. The plan is to duct them to be air tight between the intercooler (green) and the oil cooler (yellow) while allowing additional mass and colder air to be pulled in for the radiator. Ideally I would have liked to duct each individually and allow for fresh air to be directed on each.





Here's about the only thing I have found online recently:
http://ecomodder.com/forum/showthrea...or-6439-3.html

[infernosg]

Ever come up with anything? I've been reading around the Improved Touring forums and the general impression is to not have the outlet of one heat exchanger leading to the inlet of another and that ducting so no air can bypass a heat exchanger is critical. Just curious if you made anything because I'm scratching my head trying to come up with something for my FC.

[infernosg]

I wanna bump this to see what everyone else is doing for ducting: how they're set up and what materials are being used.

[josh18_2k]

i used DiBond for mine. Lighter/stiffer than plain aluminum sheet, although alumacore is probably better.

There's no 'science' involved in my setup, other than (mostly) sealing the front of the radiator. The front of the duct isnt properly sealed to the bumper because I am lazy. but that would be better.

[infernosg]

^^^ So you completely cut out the stock radiator cross brace and everything? Did you also remove all the front bumper cover support or is it just removed for the pictures? Unfortunately I still have all the crap in the way, but I have lowered the OEM oil cooler so its bottom is level with the radiatior's. What are your thoughts about ducting the "exhaust" of the oil cooler away from the radiator?

[josh18_2k]

yah i got rid of all that crap. ducting looks like a PITA with all the stock metal in there.

out of all the pieces that cross the car, i only kept the triangular one (top of rad mounts to it) and the bumper mounting flange thingy. both are pictured above.

also got rid of all the headlight garbage in the process, and used some cheap plastic autozone lights :P

[josh18_2k]

regarding the oil cooler- i just mounted it (and the fan) on the hot side of the radiator (its a single pass). i didnt want to vent into the wheelwell, and i didn't really see any other good place for the cooler. both cool fine as is, its not like i'm pushing any limits with the heat exchangers or anything.

top view might help-

[calicrewchief]

What's the Dibond like to work with? What gauge sheet did you go with?

[josh18_2k]

i dont know what thickness i used, i used scrap i found at a shop. the stuff is really easy to cut on a bansaw. scoring with a knife was pretty hard, but doable (it is aluminum afterall). beltsander worked great for cleaning up edges/corners. overall very cool stuff.

[infernosg]

Bumping this once more. Would there be a benefit of running the radiator and oil cooling in a "v-mount" setup over the stock series setup? In a v-mount setup is it more efficient to have both heat exchangers angled or would it still work well enough with one parallel to the ground? I'm thinking about leaning the stock oil cooling down so it seals with the bottom of the radiator. This would obviously require a little fabrication but would simplify the ducting.