DS mode
- Thread starter goforit
- Start date
acupunch
Well-Known Member
Re: DS mode
theoretically, its another engine mapping that allow the engine to more responsive. rev to higher high rev before the next higher gear were engage. it can be driven like and auto-mode as long as you don't manual override the shift sequence.
do you mean moving to DS mode to slow down the car, you wanted to switch to DS to down shift the gear box to gain the engine brake advantage. possible. but I think our brakes does the job quick well even in an emergence, jus need to step it hard and deep in.
theoretically, its another engine mapping that allow the engine to more responsive. rev to higher high rev before the next higher gear were engage. it can be driven like and auto-mode as long as you don't manual override the shift sequence.
do you mean moving to DS mode to slow down the car, you wanted to switch to DS to down shift the gear box to gain the engine brake advantage. possible. but I think our brakes does the job quick well even in an emergence, jus need to step it hard and deep in.
acupunch
Well-Known Member
Re: DS mode
i don't recall, what's was written on the gear shift area. but I'm sure our OBC will 1st shown DS when gear level was push t the left. once you push forward (-) or pull backward (+) then the OBC will show M1, M2, M3, M4, M5, M6 that means you're on manual shift selection.
yes DS is still auto, just the engine will rev higher than 4,000rpm max out @ 6500rpm before the next higher gears is selected.
don't use DS as engine brake. not good one. unless necessary. e.g.drop to lower gear while entering slow corners to gain traction.
i don't recall, what's was written on the gear shift area. but I'm sure our OBC will 1st shown DS when gear level was push t the left. once you push forward (-) or pull backward (+) then the OBC will show M1, M2, M3, M4, M5, M6 that means you're on manual shift selection.
yes DS is still auto, just the engine will rev higher than 4,000rpm max out @ 6500rpm before the next higher gears is selected.
don't use DS as engine brake. not good one. unless necessary. e.g.drop to lower gear while entering slow corners to gain traction.
SILVER
Well-Known Member
Re: DS mode
Is there an S in you car? If S then yes it should be sport mode.
DS = Sport Mode (in direct comparison with most cars)
Dont really understand your question.
Shifting to DS to engine brake?? You mean while driving then suddenly shift to DS to engine brake? This is possible only if you use manual gear shift at DS.
goforit;322799 said:
Is there an S in you car? If S then yes it should be sport mode.
DS = Sport Mode (in direct comparison with most cars)
Dont really understand your question.
Shifting to DS to engine brake?? You mean while driving then suddenly shift to DS to engine brake? This is possible only if you use manual gear shift at DS.
SILVER
Well-Known Member
Re: DS mode
Actually I am quite suprised that alot of ppl dont really know how to drive their cars? the SEs at PML etc dont go through how the car function etc?...I guess they assume everybody already know how to drive an auto car or understand how the gear change works etc?
Actually I am quite suprised that alot of ppl dont really know how to drive their cars? the SEs at PML etc dont go through how the car function etc?...I guess they assume everybody already know how to drive an auto car or understand how the gear change works etc?
Re: DS mode
it's possible, but not as effective as a full manual trans.
the box will drop to a lower gear more readily on DS then on D and it hangs onto the gear slightly longer...
if u wanto use engine brake, just slot into DS, tip it forward to drop the gears
it's possible, but not as effective as a full manual trans.
the box will drop to a lower gear more readily on DS then on D and it hangs onto the gear slightly longer...
if u wanto use engine brake, just slot into DS, tip it forward to drop the gears
centurion
Well-Known Member
Re: DS mode
What DS is is the transmission mode, as BMW new autos are electrohydraulic acutation type, computer decides shift not torque sensing. With DS, the computer will shift at higher revs and prioritize lower gear at the expense of fuel economy.
What threadstarter means that, he wants to drive in DS all the time because when release pedal, the gearing is lower gear, so engine brake occurs. This gives the driver a better sense of security and car control.
Fine! By all means, drive in DS.
But engine braking is not a really nice thing for the engine. It lugs the engine and creates real high temps at the valves. Wear and tear increases.
What's wrong with using the brakes? They're made to wear out.
What DS is is the transmission mode, as BMW new autos are electrohydraulic acutation type, computer decides shift not torque sensing. With DS, the computer will shift at higher revs and prioritize lower gear at the expense of fuel economy.
What threadstarter means that, he wants to drive in DS all the time because when release pedal, the gearing is lower gear, so engine brake occurs. This gives the driver a better sense of security and car control.
Fine! By all means, drive in DS.
But engine braking is not a really nice thing for the engine. It lugs the engine and creates real high temps at the valves. Wear and tear increases.
What's wrong with using the brakes? They're made to wear out.
delrosa81
Well-Known Member
Re: DS mode
Sorly ah off topic abit, but if manual then can heel and toe, especially around corners, damn fun leh, blip throttle when downshifting....shiok...E46 M3 SMG also have the auto blip function right? Damn fun man kekeke this is more fun man! Auto better use brakes better? As what you mentioned, I rather wear out the brakes than the transmission or engine
centurion;322858 said:
Sorly ah off topic abit, but if manual then can heel and toe, especially around corners, damn fun leh, blip throttle when downshifting....shiok...E46 M3 SMG also have the auto blip function right? Damn fun man kekeke this is more fun man! Auto better use brakes better? As what you mentioned, I rather wear out the brakes than the transmission or engine
centurion
Well-Known Member
Re: DS mode
There are 3 instances to blip throttle on a manual:
Double Declutch - when shifter in neutral, blip throttle, then enter gear - function of blip is to spin the synchronizers in the gearbox so that when entering gear the synchros no need to wear out.
Heeltoe - when braking, gear is in but clutch pedal still pressed, blip the throttle and before the rpm falls, disengage clutch quickly - function of blip is to sync the engine speed with the output shaft speed (related to wheel speed) so that when release clutch the wheels/output shaft don't drag the engine speed up suddenly .... smooth driving is the result, and on track, minimize the danger of losing traction on the driving wheels.
Rev Match - without braking, you shift to lower gear, before release clutch pedal, blip throttle and before rpm falls, release clutch pedal quickly. function of blip as above.
And yes, there is a combination of Double Declutch and Heeltoe/rev match which race drivers especially endurance racers always use if they don't have sequential shifter.
On the SMG, double declutch is not done, so there is just a single blip.
You can engine brake without heeltoe actually. In fact, with heeltoe, engine braking is reduced because you are actually raising the revs of the engine to match the wheels, since engine braking is the enemy of smooth driving.
In F1, one of the banned devices is engine braking control. Engine braking control has several effects, but the device aids to prevent spin by keeping revs high if throttle liftoff during cornering. This has arguably more impact than the ban on traction control.
If you are driving really really fast, Ds is good because there is a higher probability of the transmission NOT shifting during cornering. Because if the transmission shifts down during cornering, the engine braking effect will upset the rear driving tyres and you'll lose the rear end.
blipping the throttle is not for engine braking lah.delrosa81;322915 said:
There are 3 instances to blip throttle on a manual:
Double Declutch - when shifter in neutral, blip throttle, then enter gear - function of blip is to spin the synchronizers in the gearbox so that when entering gear the synchros no need to wear out.
Heeltoe - when braking, gear is in but clutch pedal still pressed, blip the throttle and before the rpm falls, disengage clutch quickly - function of blip is to sync the engine speed with the output shaft speed (related to wheel speed) so that when release clutch the wheels/output shaft don't drag the engine speed up suddenly .... smooth driving is the result, and on track, minimize the danger of losing traction on the driving wheels.
Rev Match - without braking, you shift to lower gear, before release clutch pedal, blip throttle and before rpm falls, release clutch pedal quickly. function of blip as above.
And yes, there is a combination of Double Declutch and Heeltoe/rev match which race drivers especially endurance racers always use if they don't have sequential shifter.
On the SMG, double declutch is not done, so there is just a single blip.
You can engine brake without heeltoe actually. In fact, with heeltoe, engine braking is reduced because you are actually raising the revs of the engine to match the wheels, since engine braking is the enemy of smooth driving.
In F1, one of the banned devices is engine braking control. Engine braking control has several effects, but the device aids to prevent spin by keeping revs high if throttle liftoff during cornering. This has arguably more impact than the ban on traction control.
If you are driving really really fast, Ds is good because there is a higher probability of the transmission NOT shifting during cornering. Because if the transmission shifts down during cornering, the engine braking effect will upset the rear driving tyres and you'll lose the rear end.
SILVER
Well-Known Member
Re: DS mode
Seldom go up to M6? because you are not driving your car to top speed haha :nehnehhh:
yeah la...ler gong si mi? off topic still post? tsk tsk tsk...
delrosa81;322917 said:
Seldom go up to M6? because you are not driving your car to top speed haha :nehnehhh:
delrosa81;322935 said:okok i know heel & toe not engine braking thats why I said off topic ma, u very the fierce leh....
yeah la...ler gong si mi? off topic still post? tsk tsk tsk...
