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Jun
2
comment Do fast cars need to occasionally be driven fast?
Interesting, nice to have an anecdote. And yes, I'm realising that there isn't substantial objective knowledge about this. That forum unsurprisingly includes people advocating spirited driving for engine maintenance, but again, the bias is heavy! I'll let this question hang for a bit longer to see if we get some more objective responses.
Jun
2
comment Do fast cars need to occasionally be driven fast?
Good answer. I guess the uncertainty lies around the "operating temperature". Yes you have the cooling system temp, though for a given cooling system temp my understanding is that you could have a significant range of temps of the engine internals. I think it's possible that the engineers could design an engine for which the proper operating temperature, for internal carbon buildup prevention, is actually quite hot due to "spirited driving". I'm still learning about mechanics, but would that be reasonable?
Jun
1
revised Do fast cars need to occasionally be driven fast?
Changes throughout
Jun
1
asked Do fast cars need to occasionally be driven fast?
May
24
awarded  Popular Question
Mar
13
awarded  Citizen Patrol
Dec
10
comment Engine power specification at different rpm?
Great explanation. Do you prefer the peaky curve even just for street driving, or is it mainly because you track your car?
Dec
5
accepted Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
Dec
4
accepted When is EBD (Electronic Brakeforce Distribution) beneficial?
Dec
4
revised Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
added 144 characters in body
Dec
4
comment Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
@BobCross Yep I hope I portrayed that by showing that µ isn't constant. Ok to try make it really clear, I mean a braking system which is overpowered. The pads and pistons and all that have more than sufficient force to slow down the wheels as much as they want - so much so that they could lock the wheels, but due to the use of ABS they don't lock the wheels, they instead grip at the threshold. I don't get why you're saying the cornering grip and braking grip is completely unrelated - didn't you read the "Traction Budget" from The Physics of Racing?
Dec
4
comment Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
@mac Exactly, that's what I wanted the answer to contain. Check out the answer I wrote up, do you think it's reasonable?
Dec
4
revised Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
Added equation about distance vs acceleration
Dec
4
answered Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
Dec
4
comment Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
@BobCross Not a problem if you don't agree with the edits, I'll just draft up something myself.
Dec
4
suggested rejected edit on Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
Dec
4
comment Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
@BobCross I did some more research, and Wikipedia (en.wikipedia.org/wiki/Tyre_load_sensitivity) and other sites (technicalf1explained.blogspot.com.au/2012/10/…) explain that the coefficient of friction decreases slightly as load increases. This explains everything in my mind - your experience of higher mass resulting in slightly worse braking, and even the nose dipping doing likewise. I'm going to draft some edits on your answer incorporation this, hopefully we can come to an agreement.
Dec
3
comment When is EBD (Electronic Brakeforce Distribution) beneficial?
So how come my car claims to have ABS but not EBD?
Dec
3
comment Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
@BobCross Definitely, more weight is going to increase the rate of brake fade. However my premise is a one-off stop, so I'd build the experiment around that. This question may be left open for a while until I can actually test this. Also need to make sure I have cash to replace the brakes if need be - this doesn't sound like a healthy test for my brake pads!
Dec
2
comment Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
@BobCross My biggest gripe with your answer is the assumption that the braking force will be the same as the mass of the car increases, even if the tires can still lock up. I also don't get why you recommend a set of articles and then disagree with it. Anyway it looks like we're in a bit of a stalemate until we have some numerical data. I would love to carry out that experiment, I'd have to think where and when I could do it. I'd change it so that weight is alternated each run, current experiment setup will make progressive brake fade skew the results.