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      09-05-2012, 01:48 PM   #31
MikeE92M3's Avatar

Drives: 08 E92 M3
Join Date: May 2012
Location: Richmond, VA

iTrader: (5)

Originally Posted by m3an View Post
just keep in mind that there is a formula to determine the correct needed length based on volume to eliminate the drone. That AA setup should be a good baseline on where to start
Yep, I have been looking into some research, and as far as size goes, the picture I posted above is very very close to how the magnaflow mufflers look (size, placement, etc), and I think if I can utilize the exact same location where the chambers are, I think I can eliminate most of, if not almost all, of the drone.

I have ordered the Aero Ar25 resonators, and I think I am going to cut them to make them shorter and reweld it together. Or I may buy the vibrant bottle types ones cause they are thinner and shorter. If I made helmholtz chambers regardless, will it still help with some of the drone? I will follow up soon.
2008 (07/08) E92 M3 BPM Stage II Tuned by Mike Benvo, 6MT, Turner Test Pipes, Magnaflow Custom Catback Exhaust (Magnaflow X Pipe, secondary cat delete, Aero Resonators and Helmholtz Chambers),Vorsteiner CF Lip, Hamann Style CF rear diffuser, CF Rear Decklid Spoiler, BMW Performance Kidney Grills, CF Side Grills, OEM GTS Wheels, K&N Drop-In Filter, GP Thunder 8k Angel Eyes, Painted Reflectors.