exhaust sound : Car vs Bike

[richardtan]

Hello everyone!

I have heard motor bike exhausts making incredibly lound and exciting sounds.
But the engines are generally much smaller than cars'.

So, how is it that bike engines seem to sound louder?

Any clues, bros?


regards
Richard

 

[shiroitenshi]

Hello everyone!

I have heard motor bike exhausts making incredibly lound and exciting sounds.
But the engines are generally much smaller than cars'.

So, how is it that bike engines seem to sound louder?

Any clues, bros?


regards
Richard

High rpm. bikes can reach upwards of 14K rpm, without modifications.
Also exhaust due to short exhaust system compared to cars.

 

[^pomen_GTR^]

not really....

but the main key to that screaming banshee sound was:

1)extremely short stroke (oversquare engine=piston much bigger than stroke measurement)

2)aggressive camshaft degree that allow high rpm powerband (of course no torque at anything below 6k rpm)

 

[shiroitenshi]

maybe the short reply invites misunderstanding. Isn't it a given that high rpms requires high cams (and shorter strokes to meet the higher rod stroke ratio to reduce sideloading?)

As for the oversquare bore stroke, haven't considered that since honda b16as are same, 77.3mm stroke vs 81mm bore, but doesn't scream like a superbike even at 9.5k, or does it? Perhaps the ratio matters?

As for the shorter exhaust, when using a short muffler immediately after the header, the car does sound louder, but I do think it sounds close to a superbike, then again, this is subjective since it's my hearing.

Damn maxis BB keep timing out. When pressing back button, some of my sentences disappear.

Used to own a superbike, now a cruiser only. 535, I think everyone knows what bike this is. Cheap now.

 

[^pomen_GTR^]

* i do agree that the ratio of oversquare engine on bike was much more than oversquare engine in car...

Bore x stroke: 78.0 x 52.2 mm (3.1 x 2.1 inches)(Yamaha R1) a 1000cc engine...


xv535 is famous for unker to cruise along the highway

 

[shiroitenshi]

ha ha. That's because i realize i'm more to unker age than youngster age.

 

[EGNINE]

anybody using superbike muffler on their car? been recommended by my pomen before to use superbike muffler on b16a..price around 1k...he said long2 time ago vtec king salak south use that muffler and sound like superbike

 

[DanzEterna]

i got see normal 125cc bikes using car muffler la hehe.....
i tot superbike exhaust costs more than rm1k...

 

[EGNINE]

danz how was the 125 sound? 2 stroke or 4 stroke? cant imagine hehe

i think 1k only for used muffler kot

 

[DanzEterna]

sounds like sh*t haha.....not sure la bro whether 2 or 4 stroke.
i tot it was a lamborgini behind me, when i look at my rear view mirror, it
was 2 indian fella on a motorbike. i was like WTF. damn bising. sound like lori balak pon ada.

 

[richardtan]

Thanks to All Sifus for your advice.

This site is awesome!

Happy holidays