Noise levels

[Chris71]

Didn't want to hijack the thread in the Griff section so I thought I'd start my own.

For those who've tracked their Chim (or indeed Griff): What sort of noise level did it record?

I know they all vary, but any idea what sort of level my otherwise standard but fully de-catted 500 would be? ... Will I get on any noise-limited track days without additional silencing (I think 105 dB is as high as they go?) and what could I hope to get it down to bolt-on silencers?

[SILICONE KID]

I have the ACT DE Cat Y piece ,pre cats out and a standard exhaust.After talking to TVR Monster he said my car will be about on the limit so i purchased these..The only thing is i can`t seem to drill for the self tappers..But they come with clamps ..I have them for back up just incase they fail the sound check.

http://cgi.ebay.co.uk/Trackday-Silencers-TVR-Griff...

These are for sale look interesting

http://cgi.ebay.co.uk/TVR-Griffith-Chimaera-Penins...

[ph1l5]

Im running ACT DE Cat Y piece ,pre cats out and the offord's "sports exhaust" conversion and recorded 114 db then 104 with silencers.

[Chris71]

ph1l5 said:

Im running ACT DE Cat Y piece ,pre cats out and the offord's "sports exhaust" conversion and recorded 114 db then 104 with silencers.

So that's 104 dB with additional bolt-on silencers fitted?

I fear I might be a while before I take to a track in my own car again.

[shpub]

It's covered in the bible. It's also covered in the FAQ on my website here

[SILICONE KID]

That is very loud ,i had the same set up as you but it was just to much

[ph1l5]

SILICONE KID said:

That is very loud ,i had the same set up as you but it was just to much

WHAT...YOU WILL HAVE TO SPEAK UP

[SILICONE KID]

Im more in to Chinese whispers

[Chris71]

shpub said:

It's covered in the bible. It's also covered in the FAQ on my website here

Thanks Steve. Some very useful info there and it suggests my decatted 500 would come in at 100-103, so I should be okay on 105 dB days.

IIRC That's basically just Silverstone in the London-type area? I think Brands and Bedford are high 90s and Goodwood is lower still...

[haircutmike]

Standard exhaust with pre cats removed at 4500 rpm, (that's what they will check it at) = 94-99 DB depending on where, weather, who and if you can keep the engine from going above 4.5K, harder then you think as it seems to come on cam then!

Mine has only failed a couple of times and then I used the inserts.

I wouldn't mess with the system or you will bound to fail .

If in doubt, get it checked out by someone with a meter.

[Kitchski]

120db at Goodwood (though i think he recoreded a few bangs too) and 114db at work. Either way it's not going on a track!

That's with sleeved silencer and pre-cats removed. Main cat still in place though.