Evil Forces are Gathering

[Coldkiwi]

Its one thing having a DBa meter....its another knowing how to use it properly!

Oh so true!! And I wonder whether LTSA will be providing suitable training for WOF inspectors? Not sodding likely eh Motu?

a sound proof room isn't really needed for doing an exhaust because they putout plenty of noise anyway but the trick is to educate the guy doing the reading so he knows whats going to bugger the reading and whats not.

On the 'exposed mechanical parts' idea, funnily enough I was driving the car on the m'way in the weekend and a guy on a Triumph Sprint rolled passed at around 100kmhr. I rolled the window down to get a listen of the lovely triple but all I could hear was the blimmin chain screaming away. I've never noticed that before when riding (presumably because of the wind roar around my helmet) but I found it a very interesting observation.

[Hitcher]

I rolled the window down to get a listen

Interesting behaviour that I have observed from several cage drivers who, when seeing me start to overtake, have wound down their window and stuck their heads out as I've gone past (I usually change down a couple of cogs to enhance their experience). Is this the same thing as that aural sex I've heard so much about??

[Cleve]

just don't get it. A noise-liberating exhaust system that makes your car or bike sound good is at its best when you can really make the engine sing i.e. at the higher end of the rev range. Why then put such a thing on an auto, where the transmission never lets you wind the engine out? Or where it changes up and down constantly under load/no load, making an exhaust-modified vehicle moo like a lovelorn yak rather than howl like a cut banshee?


Ah yes but with my wife's automatic GT Legacy (which I put a free'er breathing pipe on for when I have to drive it) you can change gears using the Auto shift and/or click the power button which does allow it to rev out!

Anyway don't want them to regulate against my Scorpion pipe on my SV. Love the sound.

Cleve

[Motu]

Oh so true!! And I wonder whether LTSA will be providing suitable training for WOF inspectors? Not sodding likely eh Motu?

a sound proof room isn't really needed for doing an exhaust because they putout plenty of noise anyway but the trick is to educate the guy doing the reading so he knows whats going to bugger the reading and whats not.

Heh,heh....right.Not only bikes,but all diesels will fail - obviously the industry standard Dickhead Smith meter is not very good for this test.Is there a better way to use it? Do I need an 8x4 sheet of ply with a hole for the pipe to poke out? It doesn't matter where you hold it,they pick up engine sounds as well...too close to the pipe to get away from other noises and we get a fail again.Is there a pick up I can fit to my digital scope? Interpreting a wave form has more value than watching a needle twitch or digital numbers tumble.

[Coldkiwi]

Heh,heh....right.Not only bikes,but all diesels will fail - obviously the industry standard Dickhead Smith meter is not very good for this test.Is there a better way to use it? Do I need an 8x4 sheet of ply with a hole for the pipe to poke out? It doesn't matter where you hold it,they pick up engine sounds as well...too close to the pipe to get away from other noises and we get a fail again.Is there a pick up I can fit to my digital scope? Interpreting a wave form has more value than watching a needle twitch or digital numbers tumble.

AHHH HA! You admit it! You speak logic! Confess!! Confess!!

Actually, handing out superflash meters with spectrum levels is probably not a good idea - it'd just confuse more people. A simple DBA reading that gives an average over the time the engine is run is fine (given the limitations of practical testing etc) so long as the operator knows what he's doing in terms of where he should stand and what could give a false reading so he can do something about it to get a good one.