ceecookie SG 60km/h coz speed limited,but sometimes i know the speed limiter spoil so the engine can hit past that.Speedo ends at 125km/h
SBS1985C SG Singaporeans are better off walking then taking public transport... all breakdown or travel so slow....
Scania N113CRB luver SG Plus the gearbox's retarder . Talk about engine brake , anyone realised that when the B9TLs starts to brake , the engine emits a loud humming sound ? It seems like engine brake sound to me .
stooper SG For SMRT O405, seen many times, but for SBST O405, almost all of them have speed limiter working. It's quite obvious when you take along expressway. You hear the engine wanting to rev higher but cannot rev like that.
tintinspartan SG I took Scheme B Bus and most of them hit 70km/h till 85 km/h. Leyland ADDs are like fast. They have strong engine sound. I remember taking SMRT Mercedes 0405 Volgren and it shoots into third lane (impatient car lane).
The_Bus_Guide SG Engine brake don't make a sound. You don't even have to step on the brakes to get the engine brake. Engine brake goes to work once you let go of the accelerator pedal. When you do that, the engine will slow down and this will in turn slow down the wheel. That is engine brake. A retarder creates a magnetic field around the engine which helps to slow it down at faster rate. This adds to the effectiveness of the braking system and reduces wear on the brake pads. What you hear on the B9TL is the exhaust brakes. Its purpose is the same as the retarder but it works differently. Basically, the exhaust gas is compressed inside the cylinder and the built in pressure helps to slow down the vehicle. But I'm not too sure about this, though.
kenn3th SG yea, heard before, when the driver presses on the accelerator, you can hear the potential to move faster, then suddenly it will lose power and you can see the driver wack the bus again, but to get the same result over and over again
Scania N113CRB luver SG Ah...yaya !! Its the exhaust brakes !! I got confused.. If u do notice , there's a slight "psst" sound after the "vrrrooom" sound is heard . Most likely its from the exhaust brakes . The Isuzu school buses ones are more obvious .
The_Bus_Guide SG The exhaust path from the engine is closed off in order for the exhaust gas to be compressed inside the cylinder and exhaust manifold. That 'psst' sound, I believe, is when the exhaust path is open again. This type of braking is not new to SBS. Old models such as the Volvo B57 and the Mercedes OF1417 had them too. In a way, the B9 brings back sweet memories.
