Track Talk A place to talk about Track and DE Events, share driving tips and other Track related items. |
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#1
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All in vs ABS
Interesting comments in the vid thread for the most part
So I thought I'd start one on the traditional "All IN" vs "WTF ABS" spins. Sounds like pumping the brakes might work better in ABS cars during a spin... or at least a release and reapply? Comments?
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David I hope to arrive to my death, late, in love, and a little drunk! Just because I don't care doesn't mean I don't understand... Homer Simpson "That's what's keeping me out of F1.... Too much mental maturity...." N0tt0n Some cause happiness wherever they go; others whenever they go. CHAOS, PANIC, AND DISORDER my work here is done... Live without pretending, Love without depending, Listen without defending, Speak without offending |
#2
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Thanks, TR. I was actually just about to start this thread myself, because I drive an ABS car and haven't really heard much about spinning other than "Both Feet In" which is apparently not always correct. I'm also a little surprised at how little I've heard about it in classrooms considering the number of people droving with ABS now, particularly in the lower run groups.
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John P. 1994 968 - DD 1984 944 NA - Low income housing for mice / Lemons Car Past: 1986 951 - sold 1987 944 S2 Conversion - sold 1989 944 NA - sold 1986 944 NA - donated |
#3
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Gas!
More seriously though, if the car is already in a spin, unless the drover can manage threshold braking while on grass, just let the ABS do the work. More importantly, it keeps the car from rolling toward the unsuspecting drover behind once the spinning stops. The only difference I see is with ABS, both feet in and keep steering.
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Toby 2005 997 www.teamshum.com Previous: 2009 Boxster S (Kate, Molly's Dirty Sister) 1991 964 C2 Coupe (Tory) 2001 Boxster S (Dirty Molly) |
#4
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I always suspected that "both feet in" on ABS did not have the same effect as in non-ABS cars. On my non-abs car, when the tires lock up, they're no longer influencing the direction of the car and it should continue in whatever direction its going. But ABS would unlock them and provide direction.
If I was driving an ABS car, it would still be both-feet-in, but expect the car to go where the tires are pointed. In the NSX video, he was basically toast before he countersteered.
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Greg Rockville MD |
#5
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x2
Keeping your foot on the brake still slows the car. Keeping you foot on the clutch prevents turning the engine backwards once you go 'round.
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Stephen www.salazar-racing.com 1970 914/6 - 3.0L GT 1983 911SC - 3.32L IROC 1984 930 2008 S2R1000, dirt bikes (some gas, some electric), Sherco trials bike Sold: 2001 Boxster (hers), 2003 996tt x50 , SpecE30, 1996 E36M3 GTS2 racecar, 2015 Mustang GT |
#6
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Having only spun once in the Boxster (no abs on the '44), I was caught a bit by surprise when the direction the steering wheel was pointed started to matter. TR, what would the concept be on pumping the brakes? The big reason I've been told for both feet in is to be predictable to those behind us. I wonder how much consistenty there is in a "both feet in" spinning ABS car?
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John Clay 2011 Cayman 1986 944 "Traffic Cone" 2013 Scion FR-S |
#7
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A related question- how do you determine, when the back end is loose, whether to lift or accelerate? I see these drifting guys stay on the accelerator for control, whereas so far I have used a slight lift off the accelerator to straiten the car. Plus I always hear lifting off in a rear engined car causes spinning. Personally I think emergency measures are hardly talked about or anylized in the classroom. Yes you hear drive straight off but not much in the way of various situational analysis. Even tailgating is rarely discussed in the lower run group classrooms, and I was in an instructors car this summer when tailgating caused him to loose control and spin.
Last edited by Landjet; 11-24-2009 at 02:15 PM. |
#8
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Quote:
Quote:
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David I hope to arrive to my death, late, in love, and a little drunk! Just because I don't care doesn't mean I don't understand... Homer Simpson "That's what's keeping me out of F1.... Too much mental maturity...." N0tt0n Some cause happiness wherever they go; others whenever they go. CHAOS, PANIC, AND DISORDER my work here is done... Live without pretending, Love without depending, Listen without defending, Speak without offending |
#9
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Larry - I can't imagine ever applying brakes because the back end is "loose". This discussion is what to do when you're past the point of avoiding a spin.....ignore Toby's video.
As for what to do when the back end is loose, my answer would be to do the opposite of what caused it to be loose. Too much throttle - less throttle. Not enough throttle (causing too much weight in front, or using the rear wheels to slow the car through the transmission) - more throttle.
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John Clay 2011 Cayman 1986 944 "Traffic Cone" 2013 Scion FR-S |
#10
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I think Steve has it nailed down. You want to reduce your speed before you leave the surface of the track. 9 times out of 10 you will simply slide to a stop on the track surface.
NSX everything is over at 3:05. He makes a double move on the steering wheel and the car's track is definitely initially going off of T4 but he second move on the steering wheel (almost immediately) pinches him towards the apex putting the car into a skid. At this point he could have stood on the brakes and looped it instead of counter steering into the wall. This is the same reason that folks hit the inside of 9 into the trees and also hit the inside of 10 into the tire wall. Time and time again. I can't tell you how many times I have seen folks sliding left and right and then leave the track and hit the brakes on the grass.
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-Paul |
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