What Causes Sharkwerks Bypass Vibration?
#16
Burning Brakes
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I had the SW Bypass on my 997.2 PDK 3.6l - No vibration issues at all.
#18
Rennlist Member
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The only real adjustable parts are how the straps connect to the bypass pipes to the carrier, the slip joints, and the tailpipes themselves. I did notice that previously the tailpipes weren't quite in the same position on both sides, now they look to be in the same place on both sides now.
No vibrations for a year now on my PDK.
#20
Rennlist Member
#21
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Think of your exhaust system like the pipes in a pipe organ. As you change the effective length you change the frequency of the sound waves. This change in frequency causes the system to vibrate differently and you hit new harmonics causing possible new rattles.
#23
Rennlist Member
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I installed the bypass in 2011. It did vibrate noticeably, but I am virtually certain it was due to over tightening during installation. I then had the PSE installed also, and it solved the problem. I assumed that the PSE install required removal or adjustment of the SW bypass, and the end result of the two installations is minimal vibration and great sound.
#25
Rennlist Member
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#26
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When I reinstalled the center muffler back to OEM the vibration goes away.
#27
Rennlist Member
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I had the SW CM bypass installed on my previous 911 (2010 C2s Pdk) and it then had the "vibration". Per Sharky and Dan, the EVOMSit tune which did raise the idle about 50-60 rpm smoothed it out perfectly. I later installed an IPD plenum and that car was sweet. Faster than a 991S 0-60 & 70-100! I recommend these mods and talk to Alex or Dan @ Sharkwerks.
#28
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So my current understanding is that it's not just Sharkwerks but any of the bypass pipes made that cause PDK cars to vibrate. Interesting to see that raising the idle or loosening the bypass pipe connections can make the vibration disappear.
But I still haven't gotten an answer an to what is causing these bypass pipes to make the car shake?
But I still haven't gotten an answer an to what is causing these bypass pipes to make the car shake?
#29
Addict
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#30