Bedford drive by noise tests

[dern]

My v8 wetsfield (side exhausts) measured 95db at a recent airfield day at 4500rpm from half a meter away... is there any way at all to predict whether or not it'll pass an 87db noise test from 20m as required by bedford?

Thanks,

Mark

[VSP90]

I doubt you will be ok with your V8! Although I do not use my Griff 500 for track days I would not expect it to pass a noise test at Bedford. My trackday car is a Radical 1100 clubsport, from what I have been told I would not expect it to pass either! I assume you are refering to a drive by test? Bedford are very strict, have a look at the motorsport vision web site. In the terms and conditions section for Bedford, it spells out the rules about noise. They even go as far as saying cars like Caterfield's especialy with bike engines are unlikly to pass. Hope this helps!!

[jleroux]

our caterham superlights are around 96-97dB static (4500rpm at ½m) and they passed the drive-by fine at Bedford.

my honda engined elise is 94dB static and was around 82dB drive-by at bedford.

obviously this is no guarantee you'll be OK as it depends on induction noise under load etc - but it's probably worth risking it.

Jonny
BaT

[Merritt]

VSP90 said:

I doubt you will be ok with your V8! Although I do not use my Griff 500 for track days I would not expect it to pass a noise test at Bedford. My trackday car is a Radical 1100 clubsport, from what I have been told I would not expect it to pass either! I assume you are refering to a drive by test? Bedford are very strict, have a look at the motorsport vision web site. In the terms and conditions section for Bedford, it spells out the rules about noise. They even go as far as saying cars like Caterfield's especialy with bike engines are unlikly to pass. Hope this helps!!

There was a radical clubsport there recently - that didn't have any problems...

Steve

[dern]

jleroux said:

obviously this is no guarantee you'll be OK as it depends on induction noise under load etc - but it's probably worth risking it.

It made a hell of a racket above 4500 when the second butterfly opened on monday... hmmm, I may try some other places first before I risk 200 quid.

Cheers,

Mark

[bgower]

Dern - I was there on Monday (Keevil - sorry I didn't say hello) and your car was pretty tame on the noise front sounded great but not massively loud, euqually the Holden (V8) was not particulalry loud either but sounded fab.

Some of the elises and 4 cylinder caterhams and westfields where a lot louder - not the most scientific test I know.

You could of course look like a girl and drive a clio like me!! no noise issues there.

[dern]

bgower said:

Dern - I was there on Monday (Keevil - sorry I didn't say hello) and your car was pretty tame on the noise front sounded great but not massively loud,

Cheers. It was good fun and although I started slowly got the hang of it towards the end. I'm hoping to do Hullavington next month which is just up the road.

bgower said:

euqually the Holden (V8) was not particulalry loud either but sounded fab.

I completely missed the holden going around. My mate was there in his subaru estate and he said it was pretty impressive going around (on the straights at least )

All the best,

Mark

[bgower]

Subaru was grrreat - the other guy who was pushing hard was the old Audi Quatro and the 325 touring. We ended up parked next to two guys in a knackered alfa - we had a great laugh all day. Which I guess is the point!

I'm sure I have a bit of video somewhere on the tape with you in it - i'll try and dig it out. there is a crappy video (of us in the golf and clio) on the abingdon 26th thread which is another good airfield circuit.

Cheers
Ben

[dern]

bgower said:

Subaru was grrreat - the other guy who was pushing hard was the old Audi Quatro and the 325 touring. We ended up parked next to two guys in a knackered alfa - we had a great laugh all day. Which I guess is the point!

You're not wrong, it was bloody superb. I was shitting myself as it was my first track day and the wet start and all that power had me all over the place. That subaru legacy came past me in the first session... I couldn't get the power down . Much better when it dried out though and I could get the sticky tyres on. Did you see those loons in the nissan silvia? They got it off ebay and spun it several times - no engine braking because it was an auto .

bgower said:

I'm sure I have a bit of video somewhere on the tape with you in it - i'll try and dig it out.

I'd like to see that... I think

bgower said:

there is a crappy video (of us in the golf and clio) on the abingdon 26th thread which is another good airfield circuit.

There's a day there on the 26th which I missed, my mate suggested keevil as it's near him so thought the company would be good. In the end we had a hell of a chase through the corner near the helicopters and the chicane after it - superb fun

Regards,

Mark

[bgower]

Just watching the videos now, fantastic clips of the clio on three wheels. The guys in the silvia auto where great. http://web.mac.com/gowers/iWeb/Site/P

Some phots of you here. - enjoy

[sdd]

We can get our Radical SR3 Supersport through without problems unless it is a very cold day. After a new quieter airbox our CSR also passed fine. There are at least four different meters so the side that your exhaust exits on doesn't make any odds.

Stephen

www.track-club.com