by "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
Published 03/20/2017 at 21:54
by "DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
Published 03/20/2017 at 21:54
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STARS: 1
So FWD cars tend to understeer more because of their forward weight bias (and power understeer if you’re too hard on the throttle.)
My question is. At high speeds, in high gear, wouldn’t that also cause them understeer less? Since they’d have more weight on the front than a balanced car. We’ll assume your holding the throttle so that you’re maintaining speed, neither accelerating or decelerating, so that torque applied to the wheels is minimized.
Edit: Bonus question! So let’s say you accelerate hard out of a turn down a straight. You balance the throttle so that you’re holding the exact same speed. Does the weight that shifted from the hard acceleration stay in the rear or does it return more to it’s static distribution?
Although I have a feeling there’s no general answer to this one and it just depends on how the car’s set up.
PSA: Kinja’s doing the thing were you can’t copy and paste images anymore. You have to download them and upload them.
"His Stigness" (HisStigness)
03/20/2017 at 21:57, STARS: 2
I’m going to answer this like a question on an Amazon product page:
“I don’t have a car and I don’t drive, so I don’t know.*”
*I do have a car, and I do drive, but I don’t know the answer to your question.
"If only EssExTee could be so grossly incandescent" (essextee)
03/20/2017 at 21:58, STARS: 2
In my sim experience FWD does not like high speeds. Very unstable and prone to sudden spins.
"TheHondaBro" (wwaveform)
03/20/2017 at 21:59, STARS: 1
Dunno
"d15b" (d15b7)
03/20/2017 at 22:01, STARS: 0
5 ZIEGEN FNO1RC.
I had a set stolen from my car :(
"TheHondaBro" (wwaveform)
03/20/2017 at 22:01, STARS: 1
From my extensive research in various “simulators” in the Forza franchise, my high-powered FWD cars tend to snap back to a straight line at high speeds. One of my best rally cars has been my FWD Integra.
"RamblinRover Luxury-Yacht" (ramblininexile)
03/20/2017 at 22:03, STARS: 2
Short version: it depends, but typically understeer at speed is still a thing.
Long version - they have more weight on those wheels, but those wheels are having to redirect more mass in an unfavorable way, so it balances out to a point. Also relevant, how close to the maximum grip of the tires you are. FWD tires having to pull the car along *and* redirect the car are pulling double duty, and even with the driving force and redirection being in harmony, you may still be running up against the limits of what the tire can do.
Of further relevance (which I hinted at above): the polar moment of the car (i.e. how hard it is to rotate) and how far the wheels are in terns of providing a redirecting force from the center of mass. Short distances and a high polar moment make for a really, really hard time getting the car to *start* turning and keep it so, to a point.
Finally, most FWD/AWD drivetrains resist unequal drive speed. You’re surely familiar with torque steer, but similarly front driven wheels forced to begin rotating at different speeds (i.e. to begin turning) will at least initially resist doing so, and a drive system with even torque split will fight the turning action all the way around, causing additional loads to crop up for the tires and producing more understeer.
"DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
03/20/2017 at 22:05, STARS: 1
Why can’t Honda’s have nice things!? :(
"The Crazy Kanuck; RIP Oppositelock" (jukesjukesjukes)
03/20/2017 at 22:10, STARS: 1
Depends on the type of FWD, some cars are Mid-engine/fwd (engine behind the front axle). They have fairly neutral handling.
The M100 Elan was mid/front, it was also compared to the Integra it handled so well.
"DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
03/20/2017 at 22:12, STARS: 0
Dat body roll doe!
"d15b" (d15b7)
03/20/2017 at 22:17, STARS: 1
Hopefully 90's Hondas get so old and lame it only leaves the enthusiasts!
"The Crazy Kanuck; RIP Oppositelock" (jukesjukesjukes)
03/20/2017 at 22:23, STARS: 0
No worse then other fwd sports cars of its time.
"uofime-2" (uofime-2)
03/20/2017 at 22:31, STARS: 1
If there is no acceleration there is no weight transfer. However consider that in the real world drag exists and must be counteracted in order to maintain velocity.
The best way to think about weight transfer is to consider the location of the cg relative to the contact patches of the vehicle. When there is acceleration there are moments resulting from the forces at the contact patches acting on it. Those moments are what cause weight transfer. Given that you can clearly see why springs and sway bars cannot effect weight transfer (significantly, only so much as they effect the cg’s position)
"itschrome" (itschrome)
03/20/2017 at 23:06, STARS: 1
All im saying is you ain’t really lived untill you know what it’s like to hang the better part of a v8 out front and try to get sassy. But then again I think there is a fair bit of subjective nature to your observations. Over all i think suspension comes in to play a lot when talking about how a car under or over streets. That beast up above with near 300hp and 300 ftlb to the fronts could hold its own in the twisties more than you think it has a right too any ways. Throw my impala into the mix at half the speeds that could do and your a dead man. You’d Oversteer straight to hell I tell you whut.
Any ways thats all I got to say.
"DC3 LS, will be perpetually replacing cars until the end of time" (dc3ls-)
03/20/2017 at 23:08, STARS: 0
Wait, is it a left side drive car or is the brake master cylinder on the passenger side?
"itschrome" (itschrome)
03/20/2017 at 23:11, STARS: 0
Ha, yes its RHD. Odd that was the first image to pop up in gis.. thats great.
"BJohnson11" (brettjohnson01)
03/21/2017 at 00:30, STARS: 1
Like you alluded to, a lot of handling characteristics can be attributed to weight distribution (though tires and weight transferring ability in the form of suspension set up play a huge role).
In your situation at high speed, let’s assume the front tires “create” a gripping force towards the inside of the turn at the front wheels. Rotating the car has to happen around it’s center of rotation, and the further forward the weight balance, the shorter moment arm that grip force has to rotate the car. Less torque to rotate the car means even at high speed it’ll be harder to rotate the car.
Ultimately though, tires play the biggest role in turning ability.
As for the bonus question, if you’re not accelerating or decelerating, your car will return to a static state, that’s what springs and dampers do.
"TheBimmerGuyWhoNowOwnsAChevy" (thebimmerguy)
03/21/2017 at 02:46, STARS: 0
First question: I still think the different forces would cause understeer but it doesn’t matter that much, trail braking is legit.
Second question: I believe because of outside forces, the weight will almost always be slightly towards the back/middle and also because it is dragging the back wheels. But my only knowledge on that is that one gnarly feeling after trying to take off with the e-brkae still on. That dip tho