91 S5 T2 intake?
12-29-12, 11:15 PM
#2
Rotorhead
Join Date: Feb 2001
Location: Charlottesville, Virginia, USA
Posts: 9,136
Likes: 0
Received 39 Likes
on
33 Posts
"Top of the line" is debatable, and it depends on the application, but generally the top of the line setup is custom slide-valve or Weber-style EFI throttle body, and a peripheral port or bridge port manifold. Some people also use a plenum.
12-30-12, 10:18 AM
#3
Engine, Not Motor
iTrader: (1)
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 108 Likes
on
91 Posts
Now if you are referring to the typical "cold air" intake or cone filter, instead of an intake manifold, then really, the filter is far less important than keeping isolation between it and the hot engine bay.
You'll notice that the car came from the factory with a cold air intake. If you just stick a cone filter on the AFM, you'll suck engine bay heat and just end up making the car slower. So you'll need to build a proper cold air box around the filter, drawing air from outside the engine bay and sealed from the rest of the bay.
Keep in mind that if you've upgraded the exhaust, and then add a less restrictive airbox/filter, you will likely run into dangerous boost levels so fuel upgrades will be necessary.
You'll notice that the car came from the factory with a cold air intake. If you just stick a cone filter on the AFM, you'll suck engine bay heat and just end up making the car slower. So you'll need to build a proper cold air box around the filter, drawing air from outside the engine bay and sealed from the rest of the bay.
Keep in mind that if you've upgraded the exhaust, and then add a less restrictive airbox/filter, you will likely run into dangerous boost levels so fuel upgrades will be necessary.