F-Type ( X152 ) 2014 - Onwards

Drive by noise for R

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Old Jan 22, 2017 | 07:39 AM
  #1  
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Default Drive by noise for R

Hey guys,

Looking at doing my first ever track day soon! Didn't ever see it being in a 550hp car a few years ago haha

Anyway im struggling to find information on how loud the the F-type R is.

The track im looking at has a 92dB (taken at 20 meters) drive by limit, is the car quiet enough for this?

I'd imagine it will be if the exhaust valves are shut but they open regardless above 4000rpm so im not to sure if your pushing hard past the pit lane it might be to loud?

On a side note the static test is 105dB at 3/4 max revs. Pretty sure this will be fine.

Any advise or feedback will be great
Cheers all
 
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Old Jan 22, 2017 | 09:01 AM
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Since its your first track day, I can tell you that I've never had a track actually do a sound test ever. (And I've had some extraordinarily loud cars.) You have a factory car, there won't be an issue. I promise.
 
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Old Jan 22, 2017 | 09:18 AM
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Even with the Active Exhaust on, the R is street legal. There's no track that will ban a street legal car for excessive noise. While it IS loud, it is nothing compared to many race cars.
 
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Old Jan 22, 2017 | 12:12 PM
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Unless your driving at Laguna Seca in California, the tracks I've been to do not have noise restrictions. As others have stated even at full throttle, our cars aren't loud enough to have noise concerns.
 
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Old Jan 22, 2017 | 02:02 PM
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Thanks for the feedback

Does anyone actually know the legal noise limit in the UK? I can't seem to find a definate answer.

Although this is my first track day i have never read about a track with no noise restriction, however i can't possibly say i have seen or heard of it being enforced so hopefully all will be well.

I even went to watch a friend at a drift day in Germany which was at an airport and even that had a noise restriction. Was ridiculous to see planes taking off and then cars with massive silencers hanging off the back of there exhausts.
 
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Old Jan 22, 2017 | 06:53 PM
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The organization putting on the track day should be able to tell you of any noise restrictions....and if they have had "your" car at previous events.
Probably 50/50 of the track events I've done in Canada and the US have had noise restrictions.
Best to find out before the big day...it would be most upsetting to be all dressed up and ready to go and then only get to watch he others play.
 
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Old Jan 22, 2017 | 08:18 PM
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2016 F Type R readings as per Car&Driver:


IDLE 47dBA
FULL THROTTLE 83dBA
70-MPH CRUISE 72dBA
 
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Old Jan 23, 2017 | 01:51 AM
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Originally Posted by BostonKiller
2016 F Type R readings as per Car&Driver:


IDLE 47dBA
FULL THROTTLE 83dBA
70-MPH CRUISE 72dBA
Awesome, thanks!
 
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Old Jan 23, 2017 | 09:56 AM
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....or, in other words, about half the sound output of every Harley Davidson on the road! LOL

Dave
 
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Old Jan 23, 2017 | 10:44 AM
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Originally Posted by Adz3000
Awesome, thanks!

My pleasure. F Type Rs are not painfully loud. Not at all. The sounds is very well calibrated. I've driven a Lotus Elise and that thing is hard on your ears for sure.


However, the readings I posted are (most likely) taken from inside of the vehicle.
 
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Old Jan 23, 2017 | 11:23 AM
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Originally Posted by BostonKiller
However, the readings I posted are (most likely) taken from inside of the vehicle.
I was going to suggest that as those seem pretty low.


OP, talk to the organizer of the event to verify if the sound restriction will be enforced for the event. Typically venues which have sound restrictions allow organizers to "pay" to not have the restriction (how do you think professional races take place at Laguna Seca?).
 
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Old Jan 23, 2017 | 12:01 PM
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You shouldn't have any issues, but it doesn't hurt to be careful.

Noise tests are usually taken at 4K RPM. Your car will make most noise when you rapidly lift off, so don't do rapid throttle inputs during sound testing. Also set your active exhaust into quiet mode and instead of 4K RPMs, sit at 3800 or so to keep it closed. They won't be able to tell from looking over your shoulder that you are under-revving.
 
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Old Jan 23, 2017 | 12:19 PM
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Originally Posted by SinF
Noise tests are usually taken at 4K RPM.
At a race track, they don't typically pull cars aside and do a test. They will have a sound station on the side of the track and get readings as cars are flogging it on the track. If you know where the sound station is, yes you can lift.

For some fun, do a Google Image Search with the following:

"laguna seca exhaust turndown"
 
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Old Jan 23, 2017 | 01:04 PM
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Originally Posted by BostonKiller
2016 F Type R readings as per Car&Driver:


IDLE 47dBA
FULL THROTTLE 83dBA
70-MPH CRUISE 72dBA
Those numbers are from inside the passenger cabin.
 
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Old Jan 23, 2017 | 01:21 PM
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Originally Posted by Foosh
Those numbers are from inside the passenger cabin.
Correct. I believe they also test with windows and the top (if applicable) closed. Not 100% positive about this though.
 
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Old Jan 23, 2017 | 04:57 PM
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I did Rockingham last summer in the jag and i've done others in other cars, most say on their website about noise restictions.
Some did a static test some were drive by, Rockingham was a static and all i did was leave the exhaust off, gently bring the revs up and gently let it back down again.
 
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Old Jan 23, 2017 | 08:09 PM
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WhiteTardis,
Besides Laguna Seca, Sonoma Raceway (or whatever they're calling it this year) has a pretty strict noise policy. I've seen cars pulled from the track.
 
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Old Jan 25, 2017 | 01:03 AM
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the R does NOT pass sound at Laguna...i've done two track days there and i have to lift every time going past the sound station. i typically use my 'three black flags', like you would basketball fouls...i pace them out throughout the day. i always use all three of mine, since it really stinks to have to lift and scrub off that speed (oh, well).

those sound numbers quoted above were for inside the cabin...much, much louder outside.
 
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Old Jan 25, 2017 | 01:35 PM
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Found where I read about the sound levels for the Jag. From Car and Driver's long term review of the F-Type V8S:

"How loud is it? Holding the sound-level meter during final testing, it occurred to us that we should have made this measurement before we put 40,000 miles on the car. But then there would have been meetings with human resources about OSHA violations because, with the sound meter 50 feet away from this Jag, we recorded 95 dBA during its acceleration. That’s as loud as a jackhammer, well past the 85-dBA threshold where repeated exposure causes hearing damage. Even inside the car, with the windows up and the top closed, we meas*ured 89 dBA at wide-open throttle."
 
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Old Jan 26, 2017 | 02:16 AM
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I remember drive by noise of V6 and V8 were nearly identical....I stood next to the racetrack about 10-15m away and recorded 96-99db fly by noise with my db-metre.
 
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