Noise Limits on Track Days...

[CarZee]

I've stared a thread, named as above in the Track Days forum.. www.pistonheads.com/gassing/topic.asp?t=17980&f=18&h=0

Would you guys care to contribute any figures you've got from a noise test, so I've an idea what noiselevel to expect from my S.. ?

much appreciated..

[shpub]

quote:I've stared a thread, named as above in the Track Days forum.. www.pistonheads.com/gassing/topic.asp?t=17980&f=18&h=0

Would you guys care to contribute any figures you've got from a noise test, so I've an idea what noiselevel to expect from my S.. ?

much appreciated..

It is covered in the 2nd ed S bible and in the noise FAQ on my website. The figures were taken from a lot of MSA measurements from cars that sprinted and so are pretty close.

Steve
www.tvrbooks.co.uk

[Scruff400]

quote:
It is covered in the 2nd ed S bible
www.tvrbooks.co.uk

Keep chipping away at him Steve, he might just crack

[johno]

My exhaust (no prebaffle) did 107.5 at Hethel at 0.5m.

Add silencer and it did 97.

PaulV's standard exhaust did 98 I think, or maybe slightly lower.

Cheers

Mark

[CarZee]

hmmm... how much are those inserts at Tower View then?

Presumably my exhaust will give about the same as yours? (sounds loud to me.. )

[Paul V]

Mine was 96Db I think.

[sharpy]

My S3 has always tested between 95 and 98db at sprints over the past 2 years. It has been decatted and baffles removed from rear box. However over the last 2 months the baffle located between the downpipes and the rear box has gradually disintegrated resulting in a test figure at the Hethel sprint Aug 4th of 104db. Oddly it was tested in the queue just before my last run... 102db was the limit... bit late by then though

Had the exhaust fixed at Offords last week and I can't remember it ever sounding better. Hopefully it's back down to the 98db region.

Regards

Dave S3C

[CarZee]

Dave,

The fact that you had those reading with a decatted S3C is encouraging.. the exhaust system on mine is mostly very new, so there aren't any disintegration issues..

I'm resting easy again.. Tower View will have to wait until I fancy Goodwood before they get any of my folding