Something that came from the MV for sale post.Just about all the triples I hear even the race bikes are a fair bit quieter then you would expect from a bike with just about zero inside there mufflers and big collectors.The exception is Robs MOTODD,spelled right I hope.Its pretty loud and runs a 3 into 1,but nowhere near as ear splitting loud as for instance the ex Bill Horseman's bored out 450 twin Honda race bike,and its got a huge muffler on each side.Is there more damping inside a Jota muffler than I thought or are 180 triples just not that loud.BTW I love the sound timber of the 180 or at least mine.
Muffler Music
- Thread starter Vince
- Start date
D
Davo
Guest
Vince said:
That is spelled TIMBRE by the way.
Just yanking your chain
Laverda Bomber
Hero member
The little 3 into 1 on my Martin triple was no where near as loud as I expected either. I was almost disappointed!
Vince,
The amount of dBs spat out the megaphone have quite a bit to do with compression ratio, timing overlap and revs.
The higher the CR, more valve overlap and revs the engine makes, the more ear-splitting the result will be!
Compare a woolly Norton road single to a race thoroughbred Manx. Same basic design, totally different beasts. Same goes for multis, works HRC bikes have always sounded harsher than privately tuned CBs. Go to town with triple specs, and it'll have you groping for ear plugs quickly.
piet
The amount of dBs spat out the megaphone have quite a bit to do with compression ratio, timing overlap and revs.
The higher the CR, more valve overlap and revs the engine makes, the more ear-splitting the result will be!
Compare a woolly Norton road single to a race thoroughbred Manx. Same basic design, totally different beasts. Same goes for multis, works HRC bikes have always sounded harsher than privately tuned CBs. Go to town with triple specs, and it'll have you groping for ear plugs quickly.
piet
Spondonrider
Hero member
- Location
- Colorado
When my Spondon was on the dyno at Cycle World magazine many years back I was told it was the loudest bike they'd ever run. It had the original wide open no baffle at all carbon canister on it (totally unusable on the street, since replaced). Their dyno room was located inside a separate building out across the parking lot from the main offices. During our dyno testing people started coming out of the offices to see what the hell was going on at the dyno. Like Piet said, its a matter of engine tune. The more air you get in and the bigger the bang, the more noise you get out.
The recordings I made that day sound wonderful through my Klipsch speakers.
The recordings I made that day sound wonderful through my Klipsch speakers.
Dellortoman
Hero member
- Location
- Tasmania, Australia
Hey Vince, if you like muffler megaphone music, get down to Broadford at Easter. There's a lot of interesting stuff comes out of the woodwork there, and they play a great variety of tunes - single, multi, 2-stroke, 4-stroke, etc.
Loudest bike I ever heard was a Suzuki 500 2-stroke twin at Broadford a couple of years ago. It was actually quite un-pleasant when he revved it in the pits. It's the only time I ever recall feeling actual pain in my eardrums induced by sound alone (ie. not an ear infection). I had to put my fingers in my ears, but that was not enough attenuation so I used my feet. No, I didn't put my feet in my ears, I used them to put some distance between myself and the bike.
Cheers,
Cam
Loudest bike I ever heard was a Suzuki 500 2-stroke twin at Broadford a couple of years ago. It was actually quite un-pleasant when he revved it in the pits. It's the only time I ever recall feeling actual pain in my eardrums induced by sound alone (ie. not an ear infection). I had to put my fingers in my ears, but that was not enough attenuation so I used my feet. No, I didn't put my feet in my ears, I used them to put some distance between myself and the bike.
Cheers,
Cam
tyelav13
Hero member
- Location
- Wales (gods own country)
Where is Broadford Cam?
Dellortoman
Hero member
- Location
- Tasmania, Australia
About 90km north of Melbourne, Australia
Tippie
Hero member
- Location
- Dr?bak, Norway
Agree with Cam, 2 strokes can cause extreme pain. A waterbottle sidecar in the pits at Wanneroo is the loudest bike I have ever suffered. The loudest engine ever was Moffatts Mazda rotary (also a 2 stroke really). Lots of people buy bikes for the exhaust sound, it made the 180 Lav triples a huge hit, was often a talking point with customers in Stanco. I know someone who bought a Duc bevel purely on the sound of it idling!! No wonder that cast iron mob in the States tried to patent their sound.
Just wait for all the comments when Reds flock of re-phased twins start getting used.
Just wait for all the comments when Reds flock of re-phased twins start getting used.
tyelav13
Hero member
- Location
- Wales (gods own country)
Ah, bit far for me then. 
(google "ladepumpen DKW" for more info)
markQLD
Hero member
- Location
- QLD Australia
+1sfcpiet said:
still remember the earsplitting sound at the Historics at Amaroo, back in the '70's.
henry
Hero member
- Location
- bottom left hand corner of germany
Tippie said:
they used to run a racing (4wheel) class in south africa called formula atlantic which was for mazda rotaries tuned to last a race - they were so loud and the sound so penetrating, that you really had to put your hands over your ears as they came past down the main straight at the old kyalami circuit
sonicboom500
Hero member
I know exactly what you mean about the Mazda rotaries.
Many years ago at Ingliston the Pentax Mazda did some demo laps.
As it approached it sounded loud but as it passed the grandstand it just hurt.
The front of my workshop has some large 1/4" plate windows and I thought I was going to lose them
when a pal brought his Suzuki TLR Straightliners bike down for a visit.
It really caught your breath with the shock waves.
Many years ago at Ingliston the Pentax Mazda did some demo laps.
As it approached it sounded loud but as it passed the grandstand it just hurt.
The front of my workshop has some large 1/4" plate windows and I thought I was going to lose them
when a pal brought his Suzuki TLR Straightliners bike down for a visit.
It really caught your breath with the shock waves.
Tom Eatman
Hero member
I think the biggest racket I've ever heard came from the Moto GP bikes when we were in Shanghai in 2005. The grandstands on the front straight are fairly steep and have an overhanging roof which would reflect the exhaust noise back toward the pit garages. Essentially it is a tunnel and the sound would echo back and forth from one side to the other. Ear plugs and ear defenders didn't help much and I couldn't hear worth a damn for the next couple of weeks. Can't imagine what it's like there when the F1 boys go toddling around. The best sounding bike I've personally heard (besides that old Laverda V-6 thing) is the Honda five cylinder 125 four stroke racer from 1966. It did a couple of parade laps at Motegi... the freakin' thing turns to 22,000 rpm. Yow! A close second was Quick Mick on the 500 Honda works bike going through the triple right in Jerez. He was using the "screamer" configuration and you could tell when the rear tire was spinning. I think it was probably spinning the whole time, sometimes more, sometimes less.
Tom
Tom
christulin
New member
- Location
- Colorado, USA
A Vincent Black Lightning is really loud, too. Not many of us get a chance to hear one, though.
chrisk
Hero member
- Location
- Brisbane, Australia
A bloke near me tunes the ocassional bike, the other night, a twin "something fourstroke" took off while I was out the back of my house ... sounded sweet too. It was on the limiter on almost every straight, I listened to this bike for some time and could tell from revs and gears etc exactly where he was.
The last time I heard it hit the limiter was 7 klms away where the road sweeps to the right after the school. Either he binned it or he lives near there!
The last time I heard it hit the limiter was 7 klms away where the road sweeps to the right after the school. Either he binned it or he lives near there!
GregT
Hero member
- Location
- Christchurch NZ
Living out in a rural area i occasionally run something i shouldn't out of the village, turn and come back, plug chopping on the return and coasting into my gate...as you do.
A little while back my support crew at home reported hearing me on a Z1 up to about a mile away...and could tell where it was wheelspinning. i didn't need telling, I'm getting too old for this shit. Plug chopping a big post classic wide open in top on a bumpy country road gets the adrenalin flowing.
Volunteers required for the first run of a full house Z1R in a couple of months.....
A little while back my support crew at home reported hearing me on a Z1 up to about a mile away...and could tell where it was wheelspinning. i didn't need telling, I'm getting too old for this shit. Plug chopping a big post classic wide open in top on a bumpy country road gets the adrenalin flowing.
Volunteers required for the first run of a full house Z1R in a couple of months.....
bigdavergs
Junior member
- Location
- Auburn, South Australia
Totally agree with Piet, I heard the DKW split single at the Loebethal Grand Prix re-enactment (just outside Adelaide,FYI), I was walking along the road when it went past, Holy Cow, how can something that small make so much noise!! Dave.