StinkyTofu

I just installed a full titanium exhaust on my car and it is absolutely wonderful except one thing...there is rattling inside my cabin at around 2900 rpm. It happens whether decelerating or accelerating at that specific rpm. I hear it inside the cabin behind the driver and passenger head with or without the top being up. Any help would be appreciated.

s4m222

check exhaust line for clearance issues which could be exhaust being too close to something under the car?

unless you had this with stock exhaust...

also maybe the increased volume of ur new exhaust might be making something rattle, that the stock exhaust wouldnt but that i have no clue..

StinkyTofu

Yeah pretty sure the clearance is good and there was no rattle with the stock exhaust. Argh, this is driving me nuts! I'm pretty sure the increased resonance inside the cabin from the exhaust is the culprit. But i want to find out where its ratting so i can suppress it. Thanks though!

Hyper-X

StinkyTofu... that's a funny name.

I have similar issues with vibration under certain conditons. Anyway, the reason why it's rattling IMHO is due to the increase in noise/sound pulses due to your new exhaust. The increase in airflow from your exhaust translates to increases in power and noise, however the sound pulses often create a specific resonant frequency which on a graph would show as a spike (or to your ears sound like a loud point).

Sound dampening materials found in a normal muffler will help ease those issues (like slapping on the stock exhaust). When you help dampen sound, you also dampen vibration. Louder and ligher components do cause rattling... an unfortunate but common side-effect.

StinkyTofu

Yeah thats the same thing i was thinking. But with so many people going the single-exhaust route, i thought that there might be more people haggling this problem. The '04 S2000 i test drove with this same exhaust didn't have this cabin noise .