Tim Bancroft Posted October 19, 2007 Share Posted October 19, 2007 Interesting caption and article in Track and Race Car magazine this month.The magazine took independent readings whilst at CC the other month, they were testing a FF Spectrum race car and found that CC noise tested the car at 102db, the owners of the car had their own meter with them and found theirs said 97.7db, blimey 5db. Also it seems that some disagreement was encountered at what revs a car should be tested, CC test at 4,500 rpm, TRC and the Spectrum team feel it should be at 3/4 the max revs, therefore our (road) cars should be tested at 4,100rpm assuming a rev limit of 5,500rpm.Some cynics amongst us at the last TD at CC feet that the whole noise testing scenario at CC is decidely iffy. A company selling bolt on silencers is situated at Castle Combe. Link to comment Share on other sites More sharing options...
trackerjack Posted October 21, 2007 Share Posted October 21, 2007 davesideways wrote:Problem is Tim.They stuff the probe right in the exhaust. I have seen them. About 3inches and nearly in the gas flowShould be measured at right angles from like 1 metre away.I have some interesting tricks with my side exit to piss them off.I agree totally with you on this, they do indeed stick it in the exhaust, which is not right. :( Link to comment Share on other sites More sharing options...
Russell Posted October 21, 2007 Share Posted October 21, 2007 During my three trips to see the sound men at Combe back in July, I didn't think it was a probe at all? To me it looked just like a measuring stick, something like an old car aerial to ensure the microphone on top on the sound meter was a metre away. The sound meter itself had a foam mic cover on the top, a bit like the ones listed here.http://www.firststopsafety.co.uk/mall/departmentpage.cfm/?store=TeleProductsLtd&did=46935&productpage=1&sdpage=1&Selected_TopicID=46935In which case they are probably doing it almost right.Not sure why I'm sticking up for them though, they got another silencer sale out of me. :-)Russell. Link to comment Share on other sites More sharing options...
trackerjack Posted October 21, 2007 Share Posted October 21, 2007 Well of course our sprint has never failed the sound test at any circuit, cos sprints do not need to be loud to go fast :P Link to comment Share on other sites More sharing options...
robinledbury Posted October 22, 2007 Share Posted October 22, 2007 Watch it Mr Traderjack, famous last word. Go and touch some wood now before next time at the coombe!!!!! Link to comment Share on other sites More sharing options...
trackerjack Posted October 23, 2007 Share Posted October 23, 2007 robinledbury wrote:Watch it Mr Traderjack, famous last word. Go and touch some wood now before next time at the coombe!!!!! ;D Link to comment Share on other sites More sharing options...
trackerjack Posted October 23, 2007 Share Posted October 23, 2007 davesideways wrote:Quick tap on the head then? ;DI would have a brain wave or a flow of ideas or even a thread :D Link to comment Share on other sites More sharing options...
Richard B Posted October 26, 2007 Share Posted October 26, 2007 They made me rev the nuts off the two-five at Castle Coombe in the summer. I tried explaining that she did'nt go much over 5.5K, but oh no they knew best........ Link to comment Share on other sites More sharing options...
Tim Bancroft Posted October 27, 2007 Author Share Posted October 27, 2007 With my mind on Goodwood a week on Monday, I am taking the car to work on Monday to use work's meter. I always struggle with the GT6 and noise testing, just hoping she is quieter now otherwise its another £60 and a bolt on muffler! Link to comment Share on other sites More sharing options...
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