i recently found out that you can remove the aux intake ports for more high end power but i also know that the s5 uses an air pump to open the baffles as where the s4 uses back pressure. since i have a s5 can i remove that air pump from the pulley after i remove the aux ports? i just want to remove as much parasitic losses as possible.thx

 

Huh? I'm confused.
Assuming your aux ports are working, then just removing them would kill top end power. You would have to wire them open, which would have the same top end power as keeping them but kill low end power. The air pump only draws a few hp, nothing noticable at all. Just keep the system intact.

 

Keep it on, taking it off is more trouble than it's worth. The air pump does more than just open the aux ports, it also operates the VDI and some emissions stuff. Taking it off will cause you to fail an emissions test.

 

You won't gain anymore power removing the aux ports over what you would have with working aux ports.

But you will loose low end power by removing the aux ports.

So removing the air pump and re-gaining the whole 1 or 2 HP that the pump would suck, would be radically offset by the power loss of the ports not working correctly.

In addition the aux ports are not the only thing that air pump powers. It also powers the VDI system which provides power from 5200 RPM up. Removing the air pump will also result in the VDI system not working correctly.

And that doesn't even get to the emissions issues (no air pump pretty much kills the cats).

So you can remove your aux ports and air pump and castrate your engine for both low end power (the kind of power you need when starting out at a light) and high end power (by the VDI no longer working- really limiting the engine to under 5000 RPM)