exhaust modding.

it wont be 14db, 3db is a 2x 'loudness' increase to your ear...

Generally, 10dB is considered to be twice as loud. 3dB is twice the acoustic power, but human perception needs 10dB to double loudness. That's why upgrading an audio power amplifier from say 50W to 100W is barely noticeable, except to manufacturer marketing departments :)
 
Generally, 10dB is considered to be twice as loud. 3dB is twice the acoustic power, but human perception needs 10dB to double loudness. That's why upgrading an audio power amplifier from say 50W to 100W is barely noticeable, except to manufacturer marketing departments :)

so going from 10db to 20 db will be like 20x louder not twice? i guessed by comparing it to my headphones. just turn your music from 80% to 90% and thats how much louder this mod makes it
 
Generally, 10dB is considered to be twice as loud. 3dB is twice the acoustic power, but human perception needs 10dB to double loudness. That's why upgrading an audio power amplifier from say 50W to 100W is barely noticeable, except to manufacturer marketing departments :)

Ah yes, thats correct - its been a while!

linnix - 10 to 20 will sound 2x louder, but in reality will be 3.333x more powerful accoustically
 
Generally, 10dB is considered to be twice as loud. 3dB is twice the acoustic power, but human perception needs 10dB to double loudness. That's why upgrading an audio power amplifier from say 50W to 100W is barely noticeable, except to manufacturer marketing departments :)

ok then so let me tell you that doing this to your muffler does NOT make it twice as loud. it makes it about 1/9th louder
 
sure il post a picture of it! how do i do that??? and in the pick there are 3 holes you only need one. here is what i found, with 3 1/4" holes open the engine sounds deep and very loud, it has almost 3 times the acceleration of stock but you loose about 15 kph of your top speed, with 2 holes it is still loud and only twice the acceleration but you still loose about 7kph of the top end. now with one 1/4" hole you have around 0.4-0.6 the acceleration and you gain about 8kph top speed. and it sounds the same as stock except its very poppy sounding, you can hear the air being forced through the hole and it sounds slightly deeper. all in all you gain probably 14db for sound and gain alot of speed and power and i havnt noticed any worse fuel economy or plug fowling. now how do i post that pick?

so what happens to your speed and noise increase if you drill 1 hole @ 1/8th inch? Has anyone tried?
 
so what happens to your speed and noise increase if you drill 1 hole @ 1/8th inch? Has anyone tried?

i doubt anything would happen exept that it would have a slightly whispe'r sound. just drill the 1/4th hole and if you dont like it than put a bolt through and a nut on the other end. you can try a 1/8th hole. its all about experimenting. happy ridings for whatever you decide to do!
 
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