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Technofreak:
Someone mentioned turning off traction control. That might work on some vehicles but on others the traction control stops wheel spin and enhances traction giving better acceleration.
Yes, but surely that works by reducing power output to the wheels?
Journeyman:
Technofreak:
Someone mentioned turning off traction control. That might work on some vehicles but on others the traction control stops wheel spin and enhances traction giving better acceleration.
Yes, but surely that works by reducing power output to the wheels?
What is the point of putting enough power to the wheels to cause spin, when your aim is acceleration? If you want acceleration and you give it enough welly to cause spin, either you need to lighten your foot or the electronic systems need to do it for you - aka traction control.
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I have found that in everything recent I have driven that it gets back to acceptable when in sport mode. I think the other mode is just added to get the impossible fuel economy numbers. Just need to sort out it turning back to turtle mode all the time somehow but I have seen aftermarket button modules that sort that out and other reactivating things. Never been in something new enough for long enough for it to bother me tho.
Dynamic:
Journeyman:
Yes, but surely that works by reducing power output to the wheels?
What is the point of putting enough power to the wheels to cause spin, when your aim is acceleration? If you want acceleration and you give it enough welly to cause spin, either you need to lighten your foot or the electronic systems need to do it for you - aka traction control.
No-one said you have to put enough power to the wheels to make them spin. It's perfectly possibly to accelerate quickly without spinning the wheels; this is not a binary thing.
Journeyman:
Technofreak:
Someone mentioned turning off traction control. That might work on some vehicles but on others the traction control stops wheel spin and enhances traction giving better acceleration.
Yes, but surely that works by reducing power output to the wheels?
Traction Control works by independently braking each wheel, along with cutting fuel supply to the engine.
At least on BMW.
And yes, it's possible to accelerate without spinning wheels or at least reducing wheelspin even without traction control.
In the States where driving through snow and ice is the norm during winter, one must learn to adjust one's driving habits. ;)
K8Toledo:
Traction Control works by independently braking each wheel, along with cutting fuel supply to the engine.
At least on BMW.
And yes, it's possible to accelerate without spinning wheels or at least reducing wheelspin even without traction control.
In the States where driving through snow and ice is the norm during winter, one must learn to adjust one's driving habits. ;)
Can be a right royal PITA too. I got stuck parked on grass on a slight slope in a rental Ford fiesta - the ones with the horrific shuddering DSG. It started raining, couldn't get it moving as it would die as soon as a wheel slipped slightly, that made worse by the grabby and thoroughly nasty transmission, couldn't press the esc/tc button to turn it off because it didn't have one - wasted 10 minutes looking for it. To turn it off you needed to go into obscure levels of menu on the nasty display system. I didn't find that out until I googled it later.
Fred99:
K8Toledo:
Traction Control works by independently braking each wheel, along with cutting fuel supply to the engine.
At least on BMW.
And yes, it's possible to accelerate without spinning wheels or at least reducing wheelspin even without traction control.
In the States where driving through snow and ice is the norm during winter, one must learn to adjust one's driving habits. ;)
Can be a right royal PITA too. I got stuck parked on grass on a slight slope in a rental Ford fiesta - the ones with the horrific shuddering DSG. It started raining, couldn't get it moving as it would die as soon as a wheel slipped slightly, that made worse by the grabby and thoroughly nasty transmission, couldn't press the esc/tc button to turn it off because it didn't have one - wasted 10 minutes looking for it. To turn it off you needed to go into obscure levels of menu on the nasty display system. I didn't find that out until I googled it later.
Agreed 100%. Thing that annoys me is the delay time before EMC returns fuel supply- most notably when moving off from a standing position.
But it's definitely useful when driving in wet conditions on winding roads up here in Northland, especially gravel roads.
hsvhel:
I'm using one of these in my ute....life changing
funny how they make versions for cars that come with adjustable throttle maps from the factory.
🤣
K8Toledo:several years ago work had some Ford Mondeos that were like this. Just bollocks cars all round made worse by this horrible acceleration delay that they all had. You find yourself leaning forward in an uncanny anticipation of taking off.Senecio: They basically change the curve, so if the accelerator is depressed 10% it sends a 20% signal instead. So in that respect, yes it’s the same as pressing the pedal further. However what they also do is remove the dead spot that’s inherent in many fly by wire throttle cars but most prevalent in modern common rail turbo diesels. Hence why the OP has a good response in his Ute.
I’m planning to install one in my Skoda Yeti with the 2.0 TDi engine. It has a horrendous dead spot from idle. I’ve been caught a couple of times when turning across traffic at an intersection. Should have had plenty of time but the car just sat there for what seemed like 1-2 secs before taking off.Before IT industry I drove trucks for 14 years, including 6 years in USA..
Trucks use FBW, have diesel engines & most of the torque is produced by 35psi turbochargers. I've never heard of this dead spot you refer to which is so prevalent in FBW engines.
You're more likely getting Turbo lag. Turbo lag isn't related to Fly By Wire, it's the time it takes for the impeller to spin up - and a drawback of all turbo's.
The 94-98 Subaru Twin Turbo was notorious for lag between the primary & secondary under heavy acceleration.
Someone else noted already double tapping the accelerator simply spools up the impeller.
(As an aside, I personally dislike turbos - lag is the reason why. Gimme N/A anyday of the week. :D)
MadEngineer: several years ago work had some Ford Mondeos that were like this. Just bollocks cars all round made worse by this horrible acceleration delay that they all had. You find yourself leaning forward in an uncanny anticipation of taking off.
Were they hybrid Mondeo's? My mum owns a Honda Insight Hybrid which suffers from a ~2s delay whenever economy mode is turned on.
ilovemusic:
hsvhel:
I'm using one of these in my ute....life changing
funny how they make versions for cars that come with adjustable throttle maps from the factory.
🤣
Really?!? that's free money! lol
What has adjustable maps out of interest?
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hsvhel:
ilovemusic:
funny how they make versions for cars that come with adjustable throttle maps from the factory.
🤣
Really?!? that's free money! lol
What has adjustable maps out of interest?
My car, a ZB Commodore, has a Sport mode which among other things adjusts the throttle response, which I believe is also adaptive based on how you happen to be driving at the time. More enthusiastic quicker throttle response, less enthusiastic less throttle response.
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