"Bouldaru" (alphadogg14)
02/19/2016 at 17:38 • Filed to: None
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"Bouldaru" (alphadogg14)
02/19/2016 at 17:38 • Filed to: None | 0
| 18 |
My brother claims that tire width (and thus traction) has no bearing on stress induced on the transmission when dropping the clutch at redline. I say he’s wrong. Thoughts?
HammerheadFistpunch
> Bouldaru
02/19/2016 at 17:41 |
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I see a skinny tire vs fat tire burnout video in your future.
MPA
> Bouldaru
02/19/2016 at 17:42 |
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bigger tire patch, more traction/friction assuming equal rubber.
Master Cylinder
> Bouldaru
02/19/2016 at 17:43 |
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Yeah, I’m gonna go with him being wrong here too. Unless you’re already not breaking traction in that scenario with skinnier tires, wider tires (usually) have more grip and would put more stress on the driveline. Whether it would be the transmission that would go first or the differential or the axles or something else is a different question.
MonkeePuzzle
> Bouldaru
02/19/2016 at 17:48 |
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time for some outback v ranger redline drops!
Urambo Tauro
> Bouldaru
02/19/2016 at 17:57 |
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Manufacturers will sometimes void warranties if you use drag slicks.
Smallbear wants a modern Syclone, local Maple Leafs spammer
> Bouldaru
02/19/2016 at 18:00 |
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I’d say he’s wrong too. More width=more traction=more effort needed to break the tires loose=more stress on transmission.
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Smallbear wants a modern Syclone, local Maple Leafs spammer
> Bouldaru
02/19/2016 at 18:02 |
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Unless of course it’s so underpowered that it won’t spin even dumped from the redline, then it doesn’t matter how wide the tires are the result is the same
You can tell a Finn but you can't tell him much
> Bouldaru
02/19/2016 at 18:15 |
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Assuming the rubber has similar friction and tread pattern and the tires are inflated to the same pressure the contact patches will be identical in area even though they will be different in shape. Since the tires would have identical traction there is theoretically no difference in stress on the clutch or transmission.
haveacarortwoorthree2
> You can tell a Finn but you can't tell him much
02/19/2016 at 18:22 |
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The contact patch will be the same length but would be different in width. As area = L*W, the contact patch for a wider tire will be larger than it would be for a skinnier tire. What am I missing?
Gone
> You can tell a Finn but you can't tell him much
02/19/2016 at 18:28 |
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Correcr, but wider tires weigh more (generally), as would wheels if they are wider too. So the stress on the clutch/trans would increase due to the higher static weight. And also from trying to stop the higher dynamic forces when trying to slow the heavier wheel/tire down.
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You can tell a Finn but you can't tell him much
> Gone
02/19/2016 at 18:35 |
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Good point and that is correct. I was only thinking about the forces acting between the road and the tire, forgot to consider the effects of wheel & tire mass.
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You can tell a Finn but you can't tell him much
> haveacarortwoorthree2
02/19/2016 at 18:36 |
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The contact patch for a wider tire will be wider but shorter in the longitudinal direction. The car weighs the same, if the tires have the same pressure the contact patches have to be the same area because they are supporting the same amount of weight.
Übel
> Bouldaru
02/19/2016 at 18:42 |
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More grip = more force = more stress, that’s physics
Now the effect of wider tires on grip is a bit more nebulous and can vary from situation to situation, but as a general statement they tend to increase it.
Kailand09
> Bouldaru
02/19/2016 at 20:09 |
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Depends what's in between the transmission and the tires
Denver Is Stuck In The 90s
> Master Cylinder
02/29/2016 at 19:39 |
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you gotta understand the context; his friend revved his s2000 to 9k, dropped the clutch and blew up first gear. my brother (the OP) tried to explain it away by saying it was the 255 tires’ fault.
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Denver Is Stuck In The 90s
> Übel
02/29/2016 at 19:39 |
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his friend revved his s2000 to 9k, dropped the clutch and blew up first gear. my brother (the OP) tried to explain it away by saying it was the 255 tires’ fault.
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Denver Is Stuck In The 90s
> MonkeePuzzle
02/29/2016 at 19:40 |
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his friend revved his s2000 to 9k, dropped the clutch and blew up first gear. my brother (the OP) tried to explain it away by saying it was the 255 tires’ fault.
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Master Cylinder
> Denver Is Stuck In The 90s
02/29/2016 at 22:13 |
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Well the wide tires definitely didn’t help the transmission but in that scenario I’d say the 9K RPM clutch drop was probably the primary culprit.