Exhaust replacement

[banpei]

I bought myself a dB meter as the app on my phone doesn't go further than 84dB. This isn't a limitation on the app, but actually of the mic on the phone.
The dB meter revealed some interesting things and one of them is that the phone app is way off! ?


At idle (about 1000 to 1200 rpm) the Tanabe produces around 69dB to 70dB, which is actually not that bad. But keep in mind that the scale of decibel doubles every 3dB. That means if the Fujitsubo specs are correct, it's four times louder than the Fujitsubo!
At 3000 rpm it produces about 82dB and at 5000 rpm it produces 95dB. That means at 3000rpm it's similar to the Fujitsubo and at 5000rpm four times as loud again!
Next weekend I'll be able to mount the Fujitsubo exhaust under the car and we'll learn then what's the difference between the two.