Sounds like a "total flow area" question then?
If the filter is big enough then the substrate may not matter so much (like the 944NA has a big filter).
But if filter size is limited by packaging, then a higher-flowing filter should let the engine breathe better.
I wonder if 944S2 K&N is worth anything...those things have a HUUUUGE filter.
Quote:
Originally Posted by flash968
one of the key issues with any cold air intake and its ability to add power, is to ensure that the surface area of the filter is AT LEAST as large as stock. that filter in the first pic is almost certainly smaller than stock, and likely costs power. in the case of the 968, they make a direct fit filter, so it was easy to test and verify the increases.
i have seen even larger increases in my 06 yukon and 98 grand cherokee. other cars were easy to feel the difference, but i didn't test all of them. i've been running them on every car i set up forever, and would not think twice about it. it's almost the first thing i do, because it works, and in over 30 years, i have never seen any down side, when properly maintained and installed.
again though, the application is critical.
|