Why does smoke come only from one tire?
- Thread starter CDailey
- 23 comments
- 8,652 views
anyway....
Sage
Staff Emeritus
- 12,533
- United States
- GTP_Sage
I think it's caused by the fact that the outer wheels have a larger turning radius than the inside wheels. Because the wheels should be turning at different rates to accomodate this, but aren't, one of the tires will smoke (I'm not sure why just one though... I'm sure someone else knows why).
This is the function of an LSD- To help the wheels spin at their proper speeds during cornering to avoid loss of traction in one of the wheels. That's probably why you've only seen it in lower-powered cars, because manufacturers usually don't equip LSDs on such cars, since LSDs are a bit pricey.
This is the function of an LSD- To help the wheels spin at their proper speeds during cornering to avoid loss of traction in one of the wheels. That's probably why you've only seen it in lower-powered cars, because manufacturers usually don't equip LSDs on such cars, since LSDs are a bit pricey.
Originally posted by DMX
sorry, again, but some people (like ving) will agree with me, that-- who cares? just race. don't flame me for it, i am just saying. i for one couldn't care less about one tire smoking, i don't even pay attention.
For future reference DMX, only post if you have something worth while to contribute to the thread. Otherwise, don't post.
Thanks,
Boom
Sage
Staff Emeritus
- 12,533
- United States
- GTP_Sage
Well, one issue is that it can slow you down. LSDs aren't put on just so that you don't smell smoke while driving... they're put on to help aid in driving. It's just like if you smoke your rear tires when accelerating-- you obviously want to get rid of that, either through increased skill or a driving aid (TCS). In the case of the smoking tire, it would be very difficult for someone to adjust their driving around it... so it's usually best to slap on an LSD and hope that it'll help your stability while cornering.
[edit]: Whoops, looks like I need to type (or think!) faster.
[edit]: Whoops, looks like I need to type (or think!) faster.
DMX
(Banned)
- 518
sorry, i am not really feeling all that happy today. it rains up here in PA everyday, and i am just in a tired, lazy, irritating mood. i sit here and listen to my music over and over. well anyway, maybe only one tire smokes because the car doesn't go fast enough to get both smoking.
Sage, you pretty much got it nailed why the reason one tire smokes. It's all got to do with the LSD.
Nice work man. 👍
@DMX, 👍 A rainy day isn't all that bad, turn that frown upside down.
I'm out here in Colorado and I hope it rains, cus last summer half the damn state was on fire. Just make the best possible out of it.
Nice work man. 👍
@DMX, 👍 A rainy day isn't all that bad, turn that frown upside down.
I'm out here in Colorado and I hope it rains, cus last summer half the damn state was on fire. Just make the best possible out of it.
ZondaRacer88
(Banned)
- 57
i've never noticed but that is a good point
- 20,145
- Australia
- VIPERGTS01
the reason why these under powered cars only smoke one wheel...
is because they dont even have LSD's, they have standard differentuals.
most real cars that arnt high performance cars (which dont have LSD's) when you do a burnout they only spen one wheel
if you but a LSD for these underpowered cars you will see they now spin both wheels
standard diff put all the power to the easyest path LSD's dont completely allow that
is because they dont even have LSD's, they have standard differentuals.
most real cars that arnt high performance cars (which dont have LSD's) when you do a burnout they only spen one wheel
if you but a LSD for these underpowered cars you will see they now spin both wheels
standard diff put all the power to the easyest path LSD's dont completely allow that
- 20,145
- Australia
- VIPERGTS01
yes thats what i said it has got something to do with the differentials, they are STANDARD differentials not Limited Slip Differentials(LSD) which most ordanary cars dont have, because there not needed for every day driving.
for example get a standard AE86 Sprinter from GT3 and do some burnouts you'll notice sometimes only one wheel will spin.
this is because on the sprinter they dont have LSD's from factory.
put a LSD on it and it will allways spin both wheels, at different speeds most the time but both will spin
for example get a standard AE86 Sprinter from GT3 and do some burnouts you'll notice sometimes only one wheel will spin.
this is because on the sprinter they dont have LSD's from factory.
put a LSD on it and it will allways spin both wheels, at different speeds most the time but both will spin
- 222
I only work with american muscle so we call it a locking differential or posi rear end (Posi-Traction). Not fancy Limited Slip, I always thought LSD used computers and electronics to execute the lock. If anyone wants to clear that up.
Apparently no one reads the suggestions given by Gran Turismo 3 in the Car Settings menu under the Limited-Slip Differential(i.e. the scrolling line with words of wisdom from the makers) on the tire smoke issue. "When accelerating while turning out of a corner, if the inside tire spins and spews white smoke, strengthening the limited-slip's acceleration side can reduce wheel spin." Same thing for decelerating while turning. Basically the inside tire has less far to go compared to the outside tire, but it's still spinning at the same rate as the outside tire, causing tire slippage. In most street cars the differential is set up so that the tire that is easier to spin is given more power, during normal driving, this would be the outside tire. However, when you're cornering hard, the car leans toward the outside tire putting more weight on it, and while doing so, makes it plant firmly. Quite the opposite happens to the inside tire, however, as weight is relieved from its side, causing less traction and possibly even loss of contact with the road surface, letting that wheel then spin. This is also why it's hard to get out of snow with a regular differential, and a little easier with a posi-traction differential.
LSD's have been around for over half a century now, and don't require computers to work efficiently (of course, it helps).
You can get several geared LSD's, such as the torsen, quaife, and salisbury, that react to torque differences between the wheels. You can also get viscous diff's, which use a viscous oil and two plates with holes in them (bit like the drawings of the diffs in gt3), which when they move fast, lock. It uses the same principle as a belly flop into a pool
The trueno is a good example of a car with an open diff, when the inside wheel unloads weight in a corner it lights up, causing the corner exit speed to bog down as the wheel stops spinning.
Of course, the effects work on both acceleration and decceleration. When you lift off and the car starts to engine brake, it distributes the torque across the wheels as they start to differentiate in speed. If the deccel is bound tightly, the lsd will lock and the car will understeer on corner entry.
You can get several geared LSD's, such as the torsen, quaife, and salisbury, that react to torque differences between the wheels. You can also get viscous diff's, which use a viscous oil and two plates with holes in them (bit like the drawings of the diffs in gt3), which when they move fast, lock. It uses the same principle as a belly flop into a pool
The trueno is a good example of a car with an open diff, when the inside wheel unloads weight in a corner it lights up, causing the corner exit speed to bog down as the wheel stops spinning.
Of course, the effects work on both acceleration and decceleration. When you lift off and the car starts to engine brake, it distributes the torque across the wheels as they start to differentiate in speed. If the deccel is bound tightly, the lsd will lock and the car will understeer on corner entry.
