Hi folks

is there any big different to have exhaust silencer on or off?

 

I've got a JIC single exhaust. When you take the silencer out, it goes from loud to ears-bleeding, brains-liquifying loud. Conversely, when you put the silencer back in, there's a noticeable drop in top-end power.

So yes, there is a big difference, at least for the JIC.

Steve

 

 

I've heard that is the case with most silencers - major power loss.
The manufacturers show horsepower gains from tests w/out the silencer. I would venture to bet that those gains are almost completely lost when the silencers are utilized.

Anyone want to counter this one? I still have stock so I can't say for sure.

 

I have the spoon n1 and I find there is better power throughput without silencers, but its simply too loud in car.

 

An illustration of how much backpressure the silencer adds:

At an autocross last month, but even after a few minutes' struggle, I was unable to pull it out by hand. In a moment of inspiration, I started my car and revved it to around 6000 rpm, at which point the silencer shot out of the exhaust and landed a few feet away with a loud clang.

With that in mind, think about what that silencer's doing to your exhaust flow when it's bolted in there.

Steve

 

big difference for invidia exhaust, it's just way too loud with silencer off

 

 

The throttle response also suffers with the silent tips in.

 

I feel the difference with my Invidia as well. But I like the loud sound.