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Author Exhaust noise...
Pop
Member
Registered: 8th May 03
Location: Reading
User status: Offline
27th Mar 07 at 14:01   View User's Profile U2U Member Reply With Quote
Ok so some point in the near future my exhaust is going to have to be changed, I've decided on using supersprint stuff which will consist of a manifold, sports cat, mid pipe and backbox.

For the mid pipe I've got 2 options...

1. Silenced



2. Un-silenced



Apart from option 2 probably being noisier is there a performance benefit from losing a silencer?

The critical thing here is the car will have to be kept under 98db for track use and a future plan is throttle bodies.

All constructive input is most appreciated

Thanks
Tim
Scotty C
Member
Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
User status: Offline
27th Mar 07 at 14:03   View User's Profile U2U Member Reply With Quote
If you need it to be kept under 98bd, got for the 1st one. With the second one, u'll loose backpresser, hence loosing out on torque mid-range.
Robin
Premium Member

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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
27th Mar 07 at 14:04   View Garage View User's Profile U2U Member Reply With Quote
Silenced, the unsilenced one will be raspy.
Pop
Member
Registered: 8th May 03
Location: Reading
User status: Offline
27th Mar 07 at 14:06   View User's Profile U2U Member Reply With Quote
Thanks for the help, looks like silenced is the way forward
FruitBooTeR
Member
Registered: 18th Jan 07
Location: Wolverhampton Drives: S15
User status: Offline
27th Mar 07 at 14:13   View User's Profile U2U Member Reply With Quote
Does having a silencer actualy affect the noise ?

Also how does back pressure work? I havent got my silencer in just A back box from CAT back and tbh it does seem like its lacking, how does this work then??
topshot_2k
Banned
Registered: 1st Dec 03
Location: Northampton Drives: Pug GTi-6
User status: Offline
27th Mar 07 at 14:14   View User's Profile U2U Member Reply With Quote
yes it will be deeper sound rather than a higher pitched, raspy noise
FruitBooTeR
Member
Registered: 18th Jan 07
Location: Wolverhampton Drives: S15
User status: Offline
27th Mar 07 at 14:16   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by topshot_2k
yes it will be deeper sound rather than a higher pitched, raspy noise


Performance?
Robin
Premium Member

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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
27th Mar 07 at 14:17   View Garage View User's Profile U2U Member Reply With Quote
better torque curve.
Jules
Member
Registered: 26th Nov 04
Location: Ipswich, Suffolk Status: Happy
User status: Offline
27th Mar 07 at 14:25   View User's Profile U2U Member Reply With Quote
Unsilenced will reek of chav tbh.
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