How do you make your exhaust quieter?

[aerosam]

I've noticed that my exhausts are way too loud, so I have to make it considerably quieter.

I'd rather not add a second silencer to each side as it would look pants, but I will if that's what it takes. I'd rather fit inserts inside the pipe, but won't that sap some engine power? And how effective are they really?

It's a question of this:

https://www.jetex.co.uk/jetex/store/...productId=2769

or one of these:

https://www.jetex.co.uk/jetex/store/...productId=2772

[mark]

The inserts really sap power, in my experience of turbo jap cars anyway

Personally i would try to do it with bigger or additional silencers if possible

[AshG]

bigger silencer is the only real way without losing power. to get through iva i put a restricter in mine but it really sucked power.

[aerosam]

Bugger, was hoping the inserts wouldn't be that bad.

Need to get it down to about 90db max for track days.

[DaddyA]

Hi Sam,

only using a cvh but I went for the biggest CBS do - 7", mine recorded 92db during the IVA.

£200 notes though

[mark]

Originally Posted by DaddyA

Hi Sam,

only using a cvh but I went for the biggest CBS do - 7", mine recorded 92db during the IVA.

£200 notes though

Same as mine & mine was only 87db at iva!

The tester said "hold it at 3000rpm" i said, i am!

Its a fair bit louder with the st engine though, but still not too much

[aerosam]

Originally Posted by DaddyA

Hi Sam,

only using a cvh but I went for the biggest CBS do - 7", mine recorded 92db during the IVA.

£200 notes though

Yeah, problem is though I'm running a V8 so I actually have 2 exhausts so that would be £400.

Question, despite the power loss caused by decibel inserts - do they work? Are they any good. I'm tempted to order a pair to try cos they're only £6 each.

[tex]

£400 is a good price!!
sounds expensive - i was quoted £600+ from simpsons for a busa single can!
dax rush zetec exhaust system complete costs £700+ x2 for a V8
so thats not a bad price

[minicountryman1961]

earplugs are cheaper still, or wear a helmet?

[aerosam]

Originally Posted by minicountryman1961

earplugs are cheaper still, or wear a helmet?

No good when racing circuits have noise limits though...