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Old 18 August 2016, 05:07 PM
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cam87
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Default Trackday Noise Limits

Hi guys,




I have blobeye type uk that i will be using as track day car. The car has a full 3" decat cobra system fitted and its resonated. Im worried about noise levels as i will be travelling to spa and dont want to get told i cant do the day!


I have been looking at the cobra trackday exhaust which is apparantley 97db but this is on a standard car. Does anyone have an expierence with trackdays that have a decatted system, i can only imagine there would be quite a few?
The noise limit for the day is 105db.


Thanks for any input.
Old 18 August 2016, 06:36 PM
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bustaMOVEs
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Well my milltek with custom center and h&s downpipe all 3" is 86db at 4K
Old 18 August 2016, 07:01 PM
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Blue by You
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My Milltek comes in at 87dB at Bedford track. A mate with a 'track friendly' Cobra system came close to the limit with 100dB, he wasn't impressed. Both were decatted btw.
Old 18 August 2016, 07:24 PM
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Originally Posted by Blue by You
My Milltek comes in at 87dB at Bedford track. A mate with a 'track friendly' Cobra system came close to the limit with 100dB, he wasn't impressed. Both were decatted btw.
milltek FTW
Old 18 August 2016, 08:25 PM
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Dannymot
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I was at Caldwell today my ,1997 jdm sti decat back to small back box at 5300rpm was 97 db.
Old 18 August 2016, 09:43 PM
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cam87
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thats exactly what i wanted to here, thank you guys

next question is will a catback milltek fit onto a cobra 3" downpipe?

also they list 2.75 inch pipe diameter, do you need to contact to get a true 3"?

thanks

Last edited by cam87; 18 August 2016 at 09:51 PM.
Old 18 August 2016, 09:48 PM
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Originally Posted by cam87
thats exactly what i wanted to here, thank you guys

next question is will a catback milltek fit onto a cobra downpipe?
I doupt it as milltek are a funny length size as they want you to buy their kit, hence I opted for a custom center pipe.
You could try it, but it may need flange spacers which is not really ideal but will work.

Last edited by bustaMOVEs; 18 August 2016 at 09:49 PM.
Old 18 August 2016, 09:53 PM
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cam87
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Originally Posted by bustaMOVEs
I doupt it as milltek are a funny length size as they want you to buy their kit, hence I opted for a custom center pipe.
You could try it, but it may need flange spacers which is not really ideal but will work.

thanks for the reply i have edited my reply, do you know this by any chance?

also they list 2.75 inch pipe diameter, do you need to contact to get a true 3"?
Old 18 August 2016, 10:13 PM
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bustaMOVEs
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Them are the 2 only sizes milltek do, 2.75 or 3" if not listed, contact them and ask.
2fast2cool on eBay are suppliers of milltek iirc as that's where I bought mine for previous car
Old 18 August 2016, 10:56 PM
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cam87
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Originally Posted by bustaMOVEs
Them are the 2 only sizes milltek do, 2.75 or 3" if not listed, contact them and ask.
2fast2cool on eBay are suppliers of milltek iirc as that's where I bought mine for previous car
thank you for your help
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