NIMBY thread.... Exhausts...

[Bigjawa]

Apparently one of the most popular things about Hybrid Ferraris, McLarens etc. is the fact you can leave silently. People in expensive country houses like being able to get 4 miles away before starting up their noisy V8.

No warming up for that poor old engine then.

I drove those Glider bus things and the diesel never actually stopped running in cold conditions as the battery couldn't keep up with running the heating and lights. You powered it up and it immediately started and fast idled. I ran one out of diesel once at Stormont and the battery was dead by Hollywood Arches.

[Noggin]

I usually had aftermarket exhausts, but none were ridiculously loud (I don't think!). Living in a built up area I couldn't really have stupid loud - getting home from work after midnight and waking the neighbourhood wouldn't have been great!

But I liked them for the tone more than the decibels. Might have been fooling myself I suppose!!

[Druid]

I have a pair of Arrow silencers on my Monster, because they look better than the OE silencers

With the dB killers in it's not offensively loud, and at tickover the rattle from the clutch is loud enough to drown out the exhaust noise

[Couchy]

Don’t get loud exhausts on the road, lots of them owned by shit riders and you can hear the crap throttle control they’ve got. Tbh it’s only one of the things that annoy me about a lot of people that ride bikes

[Yorick]

I used to love watching at Cadwell club hairpin on the 2 stroke races. You'd hear 30 screaming banshee approaching at silly speeds.
Then silence as they all braked
Then the noise of a few scraping on the ground.
Then 30 screaming bikes heading up to Charlie's

[Le_Fromage_Grande]

Two strokes are relatively quiet, and the noise doesn't travel far, 4 strokes are much louder and because the sound is a lower frequency it travels further, and the bigger cylinders the lower the frequency.

But I do know what Yorick means about Cadwell Hairpin, the silence before the sound of plastic hitting tarmac was ominous.

[demographic]

and the bigger cylinders the lower the frequency.

I reckon its more the fact that the fourstrokes only fire half as often that lowers the frequency.
Thats why shitetalkers always claim twostrokes "rev to the moon, innit" despite the fact that for a given cylinder capacity per pot fourstrokes mostly rev harder.
How many twostrokes have oversquare bore and strokes? Look at the pistons, kind of long heavy slugs aren't they. Now look at a decent (not a Harley, Ha) modern fourstroke engine? The piston is all top with elongated thrust faces back and front but not much else.

Some people dont seem to read the numbers on revcounters.

[Le_Fromage_Grande]

This is true, I think my YPVS350 redlines at 9500 rpm, my FZR400 redlines at 15,000 rpm, both make about 50 bhp, the FZR is a lot louder, and the noise is a lot deeper.

[The Spin Doctor]

Dad with ‘heart of gold’ stabbed to death ‘in fight over loud motorbike’

https://metro.co.uk/2021/04/15/norwich- ... -14416545/

Just the other day.

[The Spin Doctor]

Don’t get loud exhausts on the road, lots of them owned by shit riders and you can hear the crap throttle control they’ve got. Tbh it’s only one of the things that annoy me about a lot of people that ride bikes

It's a dead giveaway on a training course!

[The Spin Doctor]

Two strokes are relatively quiet

But it happens to be the frequency that babies cry at, and the human ear is particularly sensitive to that frequency... probably not a coincidence.

[Yorick]

I used to love watching at Cadwell club hairpin on the 2 stroke races. You'd hear 30 screaming banshee approaching at silly speeds.
Then silence as they all braked
Then the noise of a few scraping on the ground.
Then 30 screaming bikes heading up to Charlie's

I know a few of these

FB_IMG_1618842323883.jpg (47.69 KiB) Viewed 747 times

[Le_Fromage_Grande]

Cadwell is tiring to ride, they needed a little lie down.
Looks like 1983

[Yorick]

Cadwell is tiring to ride, they needed a little lie down.
Looks like 1983

1986. I was overseas that year.

[Yorick]

Cadwell is tiring to ride, they needed a little lie down.
Looks like 1983

1986. I was overseas that year.

This one's in 1983 though. And I'm in it

FB_IMG_1593347919289.jpg (54.41 KiB) Viewed 736 times

[Le_Fromage_Grande]

Cadwell is tiring to ride, they needed a little lie down.
Looks like 1983

1986. I was overseas that year.

I guessed 83 because of the early power valves and no fully faired ones - but I forgot that in the 80s hardly anyone raced a new bike in club racing.

[Yorick]

Cadwell is tiring to ride, they needed a little lie down.
Looks like 1983

1986. I was overseas that year.

I guessed 83 because of the early power valves and no fully faired ones - but I forgot that in the 80s hardly anyone raced a new bike in club racing.

Lots of folk had new or nearly new bikes. I got mine 2 months old with only 1 meeting.

[Tricky]

I used to love watching at Cadwell club hairpin on the 2 stroke races. You'd hear 30 screaming banshee approaching at silly speeds.
Then silence as they all braked
Then the noise of a few scraping on the ground.
Then 30 screaming bikes heading up to Charlie's

I know a few of these

FB_IMG_1618842323883.jpg

If that's the week-end I'm thinking of, it was dry Saturday, wet Sunday. I crashed 3 times including once at the hairpin (I'm still on in that pic though) but got 3 trophies too , happy days eh

[The Spin Doctor]

I used to love watching at Cadwell club hairpin on the 2 stroke races. You'd hear 30 screaming banshee approaching at silly speeds.
Then silence as they all braked
Then the noise of a few scraping on the ground.
Then 30 screaming bikes heading up to Charlie's

I know a few of these

FB_IMG_1618842323883.jpg

Ah, the days when you could read race numbers!

[demographic]

Apparently one of the most popular things about Hybrid Ferraris, McLarens etc. is the fact you can leave silently. People in expensive country houses like being able to get 4 miles away before starting up their noisy V8.

Always better to be quiet in the area you're known in and if you're going to be a really loud cockend its best to do it somewhere else where they don't know you.