View Full Version : How do you make your exhaust quieter?
aerosam
21st March 2011, 11:50 AM
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/index.php?_a=viewProd&productId=2769
or one of these:
https://www.jetex.co.uk/jetex/store/index.php?_a=viewProd&productId=2772
mark
21st March 2011, 12:12 PM
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
21st March 2011, 12:40 PM
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
21st March 2011, 01:56 PM
Bugger, was hoping the inserts wouldn't be that bad.
Need to get it down to about 90db max for track days.
DaddyA
21st March 2011, 05:03 PM
Hi Sam,
only using a cvh but I went for the biggest CBS do - 7", mine recorded 92db during the IVA.
£200 notes though:eek:
mark
21st March 2011, 06:04 PM
Hi Sam,
only using a cvh but I went for the biggest CBS do - 7", mine recorded 92db during the IVA.
£200 notes though:eek:
Same as mine & mine was only 87db at iva!
The tester said "hold it at 3000rpm" i said, i am! :D
Its a fair bit louder with the st engine though, but still not too much
aerosam
21st March 2011, 06:17 PM
Hi Sam,
only using a cvh but I went for the biggest CBS do - 7", mine recorded 92db during the IVA.
£200 notes though:eek:
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
21st March 2011, 09:11 PM
£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
22nd March 2011, 05:30 AM
earplugs are cheaper still, or wear a helmet?
aerosam
22nd March 2011, 06:44 AM
earplugs are cheaper still, or wear a helmet?
No good when racing circuits have noise limits though...
minicountryman1961
22nd March 2011, 07:17 AM
No good when racing circuits have noise limits though...
Ok, you don't like the earplugs idea. You don't want to add mufflers. You don't want to lose power. Hmmmm, well I guess your only option is to install a pair of turbochargers. They do a good job of chopping up the exhaust pulses, and they add power.
Problem solved!
aerosam
22nd March 2011, 10:58 AM
Hmmmm - I like it, I like it a lot!
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