Originally Posted by Dr Obnxs

but you still need to get air to it. This is where the elimination (or reduction) of bad airflow design helps out.

For instance, pretty much all of the K&N type filters have a square edge at the innner rubber on the filter base. This is very, very bad. Air has to make a 90 degree bend in a very short time, and the air veloicites at the corner are huge. This will create huge problems, effectivly reducing the open diameter of the filter exits. A radiusing of just a quarter inch would help this a lot. At each and every junction in the intake path, there is the potential for problems. Sure, post SC there's boost to "push" the air past the rough spots, but there is no free lunch, and the price paid is with increased IATs and more pressure drop between the SC and the intake valves than is required.

And while TB changes on stock Minis may be of little value (I took data that backed that one up), opening up the TB isn't new to the Mini. There are lots of boosted cars that get benefit from larger TBs. And there are modded Minis that get benefit from them too.

Here's (yet) another perpective. If there are people who will change aftermarket intakes over one or two potential HP, why not do it right, get a smooth flow path, and get what there is to be had from the intake? On my modified mustang, we went the cheap route (3" sewer pipe) to improve the flow from the K&N by radiusing the pipe, and having it go into the filter somewhat (hack version of GTT set-up). While there isn't room to do the sexy Webber stacks, there's benefit to be had. There are some of us that are insulating the aftermarket CAI boxes. This type of mod should be considered as well, as it's cheap and effective. I'm just surprised that GTT is the only ones that offer something like this.

Matt

Originally Posted by SHUMopper

The velocity stack intake has actually just been a hit in the 1.8T tuning scene....its proving to generate a much quicker and larger air flow for the turbocharger over standard CAI or filters.

One was released by Evolution motorsports for the 1.8T which has shown VERY good results over the typical CAI or RAM air setup.
Im looking to add this to my current setup, but here is a link to the product. Im sure there has to be something like this available for the MCS.

Originally Posted by ignote

Some filters have a velocity stack built-in.

Originally Posted by Dr Obnxs

Matt

Originally Posted by polizei

Hrmmm, this thread is starting to change my mind of the ALTA CAI.... Maybe I should go GTT over ALTA...especially since it's blue and will match my car.


-Cody