Quote:
Originally Posted by crashmy911
Going to try turning the pipes down at the ground.
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If you're looking to quiet the car from the driver's perspective, the turndowns won't really do anything. They just knock a couple db off from outside the car for the purpose of passing soundmeter tests. If you want to quiet what you're hearing, try getting a pair of Phase 9 cans, or straight-through perforated core mufflers. Coast Fabrication, Burns Stainless, Supertrapp (without any disks) all make good straight-through perforated mufflers.
For what it's worth, in my 914 racecar, I've barely noticed any difference in sound level from the driver's seat when switching from open exhaust to my Lime Rock muffler. The other engine noise, induction, and air noise seem to dominate once I'm up to speed, and I still have to wear my ear plugs.
Scott