Donington 98dB OK with Akra stubby?

alex said:

Be absolutely fine.
98db is more like 106 static

- Alex

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HertsTif said:

Oh wow, so 98 drive by is actually mega generous then, compared to say, 102 static at Snett. Excellent, thanks so much Alex, saves me getting the spanners out!

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HertsTif said:

I'm thinking about joining some mates on a track day at Donington. It's a 98dB drive by limit that day. I'm far more familiar with static tests at places like Snetterton and Silverstone so I'm not sure how that translates.

Do you think my Gen 4, with Akra stubby slip-on (still got cats and stock headers) would pass? Or do I need to be putting the stock can on for that day? According to the Akra site, it's only 2.6dB louder than stock at 6750 rpm. I'd hate to be turned away so I'm leaning towards putting stock on just in case, but thought I'd ask here as I'm sure some of you have had your Gen 4s round Donny so might be able to advise me.

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bmwbadboy said:

STATIC	101 dB(A)
DRIVE BY	92 dB(A)

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Gobert said:

From the MSV site:

Please pay special attention to the noise limit. The standard 98db 'drive-by' limit operates throughout the day. This is not comparable to the 92db limits at other venues. Standard exhausts recommended or baffled aftermarket exhausts.

It's my understanding that 98db days are classed as "quiet days" hence the lower numbers per group and cost.

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HertsTif said:

Oh, so that's a rough conversion then? So 96 would be as Alex said, 105/106 ballpark

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