No probs!!! Don't get me wrong I'm no expert, it's just going off my own experiences and experimentation. 
I've found that a larger diameter pipe with the same silencers give a deeper and less raspy tone then a smaller diameter pipe. You get more rasp with less diameter, and generally depending on the setup of the silencers, a lot less bass. You can of course change the tone to some degree with the silencers but they alter the bass/volume more than the rasp.
You can have a very large silencer that is very free-flowing. People often get muddled and see a whacking big backbox and think it's going to be restrictive, but this isn't the case at all. There's many different ways of setting up the internals of a silencer. You can have a virtually ''straight through'' silencer that has a fantastic flow rate and very little restriction but has a major effect on the acoustics.
Likewise, you can be fooled by a system with small silencers thinkng they'll be unrestrictive because they're small, but that's not always the case.
I read once in something from one of the lead engine designers for the Audi Le-Mans setup. He was being asked about the Diesel engines being very quiet and sounding very odd. He said that noise is a by-product, it's energy, it doesn't make or indicate power, it's just what's left after the explosion.
There's witchcraft in those boxes!!!
I've found that a larger diameter pipe with the same silencers give a deeper and less raspy tone then a smaller diameter pipe. You get more rasp with less diameter, and generally depending on the setup of the silencers, a lot less bass. You can of course change the tone to some degree with the silencers but they alter the bass/volume more than the rasp.
You can have a very large silencer that is very free-flowing. People often get muddled and see a whacking big backbox and think it's going to be restrictive, but this isn't the case at all. There's many different ways of setting up the internals of a silencer. You can have a virtually ''straight through'' silencer that has a fantastic flow rate and very little restriction but has a major effect on the acoustics.
Likewise, you can be fooled by a system with small silencers thinkng they'll be unrestrictive because they're small, but that's not always the case.
I read once in something from one of the lead engine designers for the Audi Le-Mans setup. He was being asked about the Diesel engines being very quiet and sounding very odd. He said that noise is a by-product, it's energy, it doesn't make or indicate power, it's just what's left after the explosion.
There's witchcraft in those boxes!!!
Last edited:
