Cold Air Intake

[PrettyRicky141]

I have a 2004 TT Quattro 225, APR chipped. I called my local Audi/ VW tuning shop and they said cold air intake was waste on the TT. They said go with down pipes then exhaust. I know the colder the air the better for the motor. So is this guy a an idiot or what? and if so, what do y'all recommend for Intake/ Downpipes/ exhaust?

thanks

RW141

[Pollup]

He knows what he's talking about. Your car is intercooled, it already has cold air. Putting a cold air intake will make a minimal difference.

[.clipse]

cold air intakes are a waste on turbo cars since they pass through the hot ass turbo anyhow.

as for downpipes, any 3" DP will do. 42DD makes the majority of 3" DP's for the 225. exhaust, get any 2.75" + exhaust to mate with the 3" DP. intake, just strap on a filter to the MAF =) that or add a velocity stack with the filter.

[Mike@Forge]

I don't have any intake to try to sell you, but consider this:

Consider that your engine's temperature is regulated by coolant and oil temps and remains constant barring any issues. For sake of argument, let's just say this number is 200 degrees F when the engine reaches it's full operating temperature.

Since the turbo is bolted to the head, and the head is bolted to the block, you can roughly figure that all of these parts will be at the same temp. of 200 degrees.

If the ambient air is 75 degrees outside the car, yet the air within the engine bay is 150 degrees, each of which will then be heated by the constant 200 degree temp. of the engine, as well as the compression of the intake air by the turbo, which would you rather have going into your engine?

75 degree ambient air or 150 degree ambient air?

If the engine temp remains constant, the temperature increase to the intake air will remain constant as well. With air going into the system that is a lower temperature to begin with, you'll have cooler air coming out of the turbo post compressor wheel.

[InTTruder]

Get a VTDA or TTDA from ModShack. DOCUMENTED decrease in air temps (yup, and we're driving hot turbos), and it moves the torque curve a bit closer. Air flow is smoother, for faster response: no twists in the airbox.

Thermo: any decrease in air temp makes the charge denser/fatter, allowing for more fuel. Period. Even on a turbo.

http://www.modshack.info/