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Postby wde_bdy » Wed Jan 18, 2006 11:54 pm

Mr Revhead wrote:isnt there an exsessive acceleration llaw they cna ping u on?


in the case of a race or an exhibition of speed or acceleration,—

(i)the speed of the vehicle is within the applicable speed limit or speed limits; and

(ii)the vehicle operator does not contravene any enactment other than this section that applies in relation to the operation of the vehicle;
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Postby Santa'sBoostinSleigh » Thu Jan 19, 2006 12:06 am

GGnz wrote:Im not putting my silencer is. I'll ask a cop to rev his V8 and see how loud that is...

Anyways I gone pass cops already and none have bothered. Just chuck it in neutral as you go pass em. Unless you lapping you have no reason to stop and go often.
cops have v6's :P (generally)
hopefully they just focus on the excessively loud cars and the dickheads who rev the crap out of every gear every time...
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Postby barryogen » Thu Jan 19, 2006 7:59 am

purple_beasty wrote:There is actually nothing illegal about accelerating as fast as possible as long as you don't break traction or exceed the speed limit.


Are you certain about that?
I thought there was a law regarding "excessive accelleration" or something along those lines.
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Postby EVL GSXR » Thu Jan 19, 2006 8:26 am

GGnz wrote:Im not putting my silencer is. I'll ask a cop to rev his V8 and see how loud that is...

Anyways I gone pass cops already and none have bothered. Just chuck it in neutral as you go pass em. Unless you lapping you have no reason to stop and go often.

You will get busted dude your car sound's like pooh's and is way too loud for an n/a.. Put another res in the system..

Oh and I haven't come across a V8 cop car as of yet!!
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Postby dori-kin » Thu Jan 19, 2006 5:07 pm

pyro_sniper2002 wrote:Thats exactly my point, a V8 at 90db will be not anywhere near as annoying as a 1600 4 banger @ 90db


If the officer is measuring in dBA, he or she is using a sound level meter with the A weighted scale applied. This scale compensates for the ear's different sensitivity, at low levels, throughout the frequency range.

As per the Fletcher and Munson curves, the human ear is naturally more sensitive to mid range frequencies at low levels (dB SPL). This flattens out with increased loudness.

A set measuring distance should also be implemented in the testing procedure.

So to summarise, 90dBA from a V8 should have the same perceived loudness as 90dBA from a 1600 straight four.
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Postby fangsport » Thu Jan 19, 2006 7:02 pm

dori-kin wrote:
pyro_sniper2002 wrote:Thats exactly my point, a V8 at 90db will be not anywhere near as annoying as a 1600 4 banger @ 90db

So to summarise, 90dBA from a V8 should have the same perceived loudness as 90dBA from a 1600 straight four.
for sure 90dBa is 90dBA, but a poxy 20v or a vtec will still sound like a piece of poo at 90dBA as opposed to a smoother rumble of a V8.

it's a wee bit like a minor engine miss. on a four banger it will be blatantly obvious, but a the number of cylinders increase, the miss will be less noticeable.
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Postby sergei » Thu Jan 19, 2006 7:46 pm

muscle V8s sound like they have something brocken, I would rather listen to VTAK or 20V trumpet noise then sound of the 70yo technology
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Postby snwtoy » Thu Jan 19, 2006 7:46 pm

purple_beasty wrote:There is actually nothing illegal about accelerating as fast as possible as long as you don't break traction or exceed the speed limit.


Actually there is a law agains excessive acceleration. It's another subjective one. If a cop deems your rate of acceleratoin unecessary he can fine you for it.
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Postby CozmoNz » Thu Jan 19, 2006 8:11 pm

Can we bring rotangs into the discussion :D
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Postby wde_bdy » Thu Jan 19, 2006 9:06 pm

snwtoy wrote:
purple_beasty wrote:There is actually nothing illegal about accelerating as fast as possible as long as you don't break traction or exceed the speed limit.


Actually there is a law agains excessive acceleration. It's another subjective one. If a cop deems your rate of acceleratoin unecessary he can fine you for it.


22A.Persons not to engage in unauthorised street or drag racing, or other related prohibited activities on roads—

(1)A person must not operate a motor vehicle in a race, or in an unnecessary exhibition of speed or acceleration, on a road unless the operation of the vehicle in that manner is authorised by law.

(2)A person must not, without reasonable excuse, intentionally pour onto, place on, or allow to spill onto a road—

(a)any petrol, oil, or diesel fuel; or

(b)any other substance likely to cause a vehicle to undergo loss of traction.

(3)A person must not, without reasonable excuse, operate a motor vehicle on a road in a manner that causes the vehicle to undergo sustained loss of traction unless the operation of the vehicle in that manner is authorised by law.

(4)In this section and in section 96(9), the operation of a motor vehicle in a particular manner is authorised by law if,—

(a)in the case of a race or an exhibition of speed or acceleration,—

(i)the speed of the vehicle is within the applicable speed limit or speed limits; and

(ii)the vehicle operator does not contravene any enactment other than this section that applies in relation to the operation of the vehicle; or

(b)the operation is conducted on a road that is closed for the purpose under section 319(h) or section 342 of the Local Government Act 1974, and is conducted in accordance with the conditions (if any) imposed under Schedule 10 of that Act; or

(c)the operation is otherwise authorised by or under an enactment other than this section.]
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Postby Santa'sBoostinSleigh » Thu Jan 19, 2006 9:36 pm

CozmoNz wrote:Can we bring rotangs into the discussion :D

NO
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