Rough idea of db
30 October 2013, 06:54 PM
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Rough idea of db
I have a 2004 sti with sports cat, decat second cat, straight through centre and blitz nur spec back box. What would the db be roughly? More than 105 static and 102 on a drive by ?
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30 October 2013, 09:47 PM
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Unmapped 12.4s @ 105
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Believe it or not, my full decat Nur Spec R was 98db at 3/4 throttle etc, without the bung in.
Since Elvington village is full of whining sods, Straightliners have to be stringent with their noise tests, and mine was the above at SSO.
Since Elvington village is full of whining sods, Straightliners have to be stringent with their noise tests, and mine was the above at SSO.
31 October 2013, 06:07 PM
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I rang oulton but they didn't have anyone there to test the car today as there was nothing on. I work six days a week so time is limited. I spoke to Duncan who mapped the car before I bought it and he says with the bung in the car will be fine, won't boost as high though. Think I will if needed put the bung in and then sneakily make it fall out in the garage in the morning 
31 October 2013, 06:31 PM
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Just put a bung in and go and have a good time. It's not about how loud you can be. It's about stritching the limits of your ability and your car, and neither of those too far.
31 October 2013, 08:34 PM
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. Can I just ask, why are these noise limits in place? Surely touring cars are louder?
Last edited by LDNSTi; 31 October 2013 at 08:35 PM. Reason: Spelling
31 October 2013, 09:25 PM
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i did a db test on a track day scooby the other day was 107db idle, was hitting 120+ at 5500rpm.(ish cant remember exact but def was 107 at idle and he had same kind of mods.)
31 October 2013, 09:54 PM
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31 October 2013, 10:44 PM
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Hi. Any car audio garage/shop in your area ? They should have one. If not, Maplin does decibel meters for either £29.99 or £39.99, look at their website.
As for accuracy of iPhone apps, IMO they read too high, I mean actual db level is lower than they read, I think.
My fully deccated 3" system with one resonator. Checked by marshals at Bedford Autodrome track.
iPhone app at 5000rpm reads 98db when proper decibel meter at 4500rpm reads only 86db.
I know it's 500rpm less but still...
You can also ask at some MOT stations if they have one ?
As for accuracy of iPhone apps, IMO they read too high, I mean actual db level is lower than they read, I think.
My fully deccated 3" system with one resonator. Checked by marshals at Bedford Autodrome track.
iPhone app at 5000rpm reads 98db when proper decibel meter at 4500rpm reads only 86db.
I know it's 500rpm less but still...
You can also ask at some MOT stations if they have one ?
31 October 2013, 10:47 PM
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If yours read that, mine will be fine as its the same, 3" system, decat with one silencer, albeit small (iirc). I'm suprised there's not a thread/sticky on here that people can add too with their experiences.
31 October 2013, 10:48 PM
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It's not until next year. I'm just planning ahead lol.
Great reply. Thankyou mate. A few ideas there that I didn't think of.
Hi. Any car audio garage/shop in your area ? They should have one. If not, Maplin does decibel meters for either £29.99 or £39.99, look at their website.
As for accuracy of iPhone apps, IMO they read too high, I mean actual db level is lower than they read, I think.
My fully deccated 3" system with one resonator. Checked by marshals at Bedford Autodrome track.
iPhone app at 5000rpm reads 98db when proper decibel meter at 4500rpm reads only 86db.
I know it's 500rpm less but still...
You can also ask at some MOT stations if they have one ?
As for accuracy of iPhone apps, IMO they read too high, I mean actual db level is lower than they read, I think.
My fully deccated 3" system with one resonator. Checked by marshals at Bedford Autodrome track.
iPhone app at 5000rpm reads 98db when proper decibel meter at 4500rpm reads only 86db.
I know it's 500rpm less but still...
You can also ask at some MOT stations if they have one ?
Thankyou mate. A few ideas there that I didn't think of.