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dsiegel360 dsiegel360 is offline
Doug Siegel
Join Date: Oct 2007
Location: Bloomington, IN
Posts: 314
Originally Posted by DonE View Post
I've actually tested this on an engine dyno when I was tuning the motor. I installed a KN filter directly to the turbo and did a full pull. I immediately installed the actual 4 inch AL tubing that would take air from inside the engine compartment (about 3 ft total length) and installed the KN filter to that. There was no difference whatsoever - time to spool, full power, torque and so on - between directly placing the air filter on the turbo vs running 3 ft of 4 inch plumbing.

Placing the air filter in the fender is a bit odd - right where water and all size dirt can directly contaminate (directly from the tire) the filter.

Here are some pics of my plumbing. The AL tubing was bought at a local muffler shop from their scrap bin. The whole thing cost around $100 with the silicone elbows representing the highest cost.

First, I want to thank Don for his inspired work. Great Idea!!!!!

Don has the GT2 tail thus gets plenty of fresh air in the engine compartment. I don't.

I considered naca ducts in the rear quarter windows plumbed to the engine compartment, but then had the potentially absurd idea...

Does it seem ridiculous to continue the plumbing into the cockpit? To put an air filter between the 2 "seats" near the rear windshield?

Or, since I removed all the a/c stuff, use the air from the decklid on the passenger side?
88' blk/blk 930: Haltech EFI, Twin Plug, Pauter Rods, Nascar Bearings, custom crank work, dowel pinned case, ported manifold and heads, Kokeln I/C, SC Cams, Turbonetics ball bearing 62-1, BB headers, RARLYL8 Zork, additional 993 oil filter, plx/inyourface gage, RS style coilover, Fikse FM10-17 wheels, TIAL 46mm 1 bar. (where the heck did all my money go?)
Old 04-20-2009, 03:01 PM
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