Discussion
rev-erend said:
It's my brothers local circuit and he got done for too high db on his std exhausted fireblade. We ended up making a special one off link pipe to a bigger rear silencer which passed.
Mates standard R6 failed so we had to cut open his standard silencer and fit another baffle and refit it track side. Then it passed!combe noise testing is ridiculous - there is a cynical view amongst sprinters that they read high so you have to go to merlin motorsport and buy the clamp on silencers or go home having already paid for the day
mine is decatted and everywhere else in the country it measures at 100 or 101 but at combe always 104/105db.
mine is decatted and everywhere else in the country it measures at 100 or 101 but at combe always 104/105db.
TooMany2cvs said:
When you say "sleeved mis-section", what is being replaced...? Cats? Silencers? What's left doing silencing?
As I understand it, the sleeved mid-section is more or less a straight through exhaust, but with the cats still in place. Had this done to the Chimaera, which made the same noise level at Brands (albeit when we asked the tester the measure the car at full revvs - it managed to scrape past the noise test at 3/4).
It's still possible for noisy TVR's to get on track, but you'll probably need to get a set of track silencers from the likes of ACT or someone else.
It's so easy to change the exhaust on the Chimaera, I had two units - one with straight-through/sleeved pipes in the silencer box and one quiet standard unit (98dB).
I had my track day prep routine down to about an hour, including the change of exhaust from loud to quiet.
To be honest, although the loud exhaust made the car more fun, it became unpleasant to drive any distance. After an hour you'd exit the car with your ears ringing.
Unless you're doing a tunnel run, or Cheddar Gorge, you're better off with the standard unit IMHO.
I had my track day prep routine down to about an hour, including the change of exhaust from loud to quiet.
To be honest, although the loud exhaust made the car more fun, it became unpleasant to drive any distance. After an hour you'd exit the car with your ears ringing.
Unless you're doing a tunnel run, or Cheddar Gorge, you're better off with the standard unit IMHO.
I was asked to hold 5200 at Snetterton, because they looked up the red line rather than accept my suggestion that it was 6k.
112dB sounds entirely believable for a Cerb with no Cats and Sports Tails, which is the usual scenario. Track day cans should take about 5dB off, not enough for you at most tracks.
However you will be fine at Anglesey, there's no Static and the Drive By is 105dB. You will be warned if you get close so you can adjust your driving if absolutely necessary. It's a great track too.
112dB sounds entirely believable for a Cerb with no Cats and Sports Tails, which is the usual scenario. Track day cans should take about 5dB off, not enough for you at most tracks.
However you will be fine at Anglesey, there's no Static and the Drive By is 105dB. You will be warned if you get close so you can adjust your driving if absolutely necessary. It's a great track too.
ukkid35 said:
QBee said:
I'm getting confused here - I thought the OP had a Chimaera
My mistake, the OP has been on the Cerb forum recently because he is looking to move to a Cerb.I think i might have got a job's worth doing the test. The did direct me to Merlin motorsport to try some bolt on silencers and come back and try the test again. I declined and went home.
The chimaera has two per-cats, a main cat. Then a silencer before splitting back out to two exit pipes.
Pr-cat's have been removed. Main cat is still in place and the silencer has been sleeved (Making it less silencing)
It is a common mod and makes the car sound much better, and in all honesty. Not that much louder.
Others getting around 105db sounds about right to me. Might see if i can swing by Silverstone.
Prizam said:
Others getting around 105db sounds about right to me. Might see if i can swing by Silverstone.
You will need to either agree a time with them, or agree a day when a track day is on.All the MSV tracks will do a test for you - that's Brands, Oulton, Bedford, Snetterton, Cadwell.
Donington is less likely, as they only monitor drive by on their track days as far as I am aware.
I am still happy to lend you a set of clamp on silencers, so that you can have it tested with and without and see what reduction they will give you. Many tracks are 105dB static, but a significant number are lower.
If you a re interested, please email me through this forum and we can discuss how to get them to you. Mine are the ACT ones that most people use. Cost about £160, so worth testing prior to buying
rev-erend said:
The centre silencer is really the only silencer on the car, by sleeving it you may not pass any noise tests anywhere even when tested fairly.
Its ok. The car has covered about 200 miles this year. 20 of them this morning. Cold, sunny, country roads. pops and bangs. V8My cheeks hurt from smiling.
Blyton does have a limit... but it's nomimally 105db sttic but never tested. There is a drive by limit of (I think) 95db. The meter is also in a friendly position, just after the pit exit/last corner, by the control hut. 20m back from the track and on a slow corner exit, you'd have to be trying very hard to trip it. Only seen it happen once and that was tripped by a very loud dump valve.
Edited by AdiT on Tuesday 13th September 10:46
AdiT said:
Blyton does have a limit... but it's nomimally 105db sttic but never tested. There is a drive by limit of (I think) 95db. The meter is also in a friendly position, just after the pit exit/last corner, by the control hut. 20m back from the track and on a slow corner exit, you'd have to be trying very hard to trip it. Only seen it happen once and that was tripped by a very loud dump valve.
I didn't know that. Thanks (God knows why - it's miles from anywhere!)Edited by AdiT on Tuesday 13th September 10:46
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