thames1948

I read on another post that some people are using a coffee can. I have
never seen or tried it though.

Car_nut57

We have seen slight improvements in performance and EGTs using the Cool Hose which is a one piece silicone hose connecting the air intake to the turbo. This hose also provides a little insulating from under hood heat compared to metal tubes.

GLFNDUDE

COME ON GUYS take a look at the AIRAID MIT tube if you do you wont be doing all of this other stuff IT IS SIMPLE slick install and looks great and peforms even better and it doesnt cost alot

John Rodriguez

Who cares about looks? I doubt it gives any tangable gains over a gutted intake pipe, and guarantee NONE over using a peice of pipe or plastic in it's place.

Dodgezilla

I tried the PVC pipe but the dimensions wouldn't work with the stock rubber tubing. I even taped up the ends of the PVC to make the diameter larger but the tape just slipped off when I tightened up the hose clamp. I ended up getting the aluminized tubing from Air Flow Systems...

MonkeyLips

I like the smooth bends and no joints on the Cool Hose (kinda spendy though). I would think it has the least amout of induced turbulance. On the otherhand, does heat soak pre-turbo really matter due to the massive intercooler? It doesn't seem like it would matter whether metal, plastic, or silicone is used since the intercooler removes any post-turbo heat...

John Rodriguez

There was actually a very heated debate about that on turbocharged gas engines. The IC CAN and WILL heatsoak. There was some hard evidence posted, but due to flaws in testing procedures it was basically thrown out. You realize if you push 200 degree air @ 20psi into an IC, it has pressure drop due to air becoming more dense, but to a point. There was a website I need to search for that was a real indepth look at different types of IC designs, their flaws (both in theory and in production). The cooler the air going into an IC, the cooler air going out of an IC, up to a point.

Jmac

As far as the Torque Tube is concerned can I just insulate it with some of that under hood self adheasing insulation that is sold at genos garage?

Jamie

Rain Man

I looked in my intake and saw the baffles. I don't think they were put in for noise as much as for directing the flow of air to the turbo. Reminds me of turning vanes used in duct systems to cut back on turbulance at bends. Might not work as well on air flow to the turbo once removed.

mikmaze

the baffles we were referring to are in the straight section of tubing between the flexible 90 deg elbows, the directional ones are just b4 the turbo, the cross ways ones in that straight section are definately to cancel noise.

Rain Man

Ah! I see. I didn't see those.

Cummins600

If anyone wants some photos of a mod - see URL below:

http://mnelson.smugmug.com/gallery/90733

MonkeyLips

Nice detail on the mod 600!

Did I read in another post that going with anything other than the OEM tubing resulted in a decrease in performance? I don't see how that is possible, but someone posted some numbers not long ago...I think.

Rain Man

I have a folder from a company called True Flow. They have a permenant foam filter and also have replacement tubes for most vehicles. I don't know if they have them for the CTD but they look good. www.trueflow.com

Car_nut57

We have been doing some testing recently of the stock and aftermarket air intake hoses. The stock intake hose with baffles, no filter housing attached shows a restriction measuring 3.1"H2O and the Cool Hose is 2.0"H20and no hose at all 1.6"H2O. To get the value for each hose the 1.6"H2o needs to be subtracted from the values shown. This makes the factory hose 1.5"H2O and the Cool Hose 0.4"H2O. We also did some flow tests and the two hose flow very nearly the same.