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Old Jul 13, 2005 | 01:36 PM
  #31  
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Originally Posted by Richard EVO
There's no mystery to trail braking. You just continue with a little bit of brake into the entrance of the turn, and there is an inverse relationship between steering and braking input. The more you steer, the less you brake. It can make for smoother entries into turns than scrubbing all the speed off in a straight line and then shifting, turning and hittin the throttle all at the same time, which can unsettle the car. However, the current wisdom (from John Mueller, btw) is that in an EVO, trail braking just slows down your laptimes.
The problem with trail braking in the RS is that once you start to make your turn, you're taking nearly all the weight off your inside wheel. Under trail braking, you're applying the same amount of brake force to one wheel with all the load (the outside wheel) and one w/out load (the inside wheel). It's very hard to find the "sweet spot" where you can rotate the car w/out locking up the inside wheel (the one w/out load).

Interesting you said trail braking will slow you down in an EVO cuz the racing school I went to emphasize the importance of trail braking. At least my instructor did... John Mueller must have his own style of driving where he can go fast w/out trail braking.
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Old Jul 13, 2005 | 01:44 PM
  #32  
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Originally Posted by machron1
I think everyone posting about ABS has it confused with EBD. ABS = unpredictable vibrating application of the brakes, EBD = effortless trail braking because of brake force proportioning. I think you guys need to clarify exactly what you are doing, because somehow I doubt you actually are talking about using ABS trail braking into a turn as your brake pedal is vibrating and your suspension is unsettling itself in a herky-jerky attempt to regain traction.
Agree. The more I think about it the more I think it has to do with the lack of EBD instead of ABS. But EBD or brake force distribution always goes hand-in-hand with ABS. Either you have it with ABS or you don't. So I guess most people (including me) just use ABS as a general term.
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Old Jul 13, 2005 | 03:30 PM
  #33  
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Interesting that the RS is sold as the "track day" EVO model, but it doesn't have EDB and ABS, to save weight and cost. I wasn't aware that trail braking should be anymore difficult in an RS than any other car, but maybe this explains something that's been puzzling me. I do occasionally trail brake, although I have been trying to "break" myself of the habit. The only way to know which is faster is to try a track both ways, and see which one produces faster times, trail braking or no trail braking.
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Old Jul 21, 2005 | 12:27 PM
  #34  
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Threshhold braking is the way to go. Some car clubs, like BMWCCA and whatnot, offer ADSS (Advance Driving Safety Schools or something like that), which have wet skid pads, and a TON of braking exercises. ABS shouldn't be necessary with good threshhold braking. Practice, practice, practice....Plus, get some good pads. I'ev tried a ton, but I love the Performance Friction 97 compound on the fronts, and some less than spectacular pads in the rear, like EBC Red's or something. This friction will let you brake so much later, without ABS. My .02
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Old Jul 21, 2005 | 03:30 PM
  #35  
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Originally Posted by HMSevo8
Threshhold braking is the way to go. Some car clubs, like BMWCCA and whatnot, offer ADSS (Advance Driving Safety Schools or something like that), which have wet skid pads, and a TON of braking exercises. ABS shouldn't be necessary with good threshhold braking. Practice, practice, practice....Plus, get some good pads. I'ev tried a ton, but I love the Performance Friction 97 compound on the fronts, and some less than spectacular pads in the rear, like EBC Red's or something. This friction will let you brake so much later, without ABS. My .02
HMSevo8 I think we covered this before. Most people without super aggressive pads will not be able to activate the ABS anyway regardless of how hard they press the pedal. We already figured out people are talking about the electronic brakeforce distribution that is included in the ABS package of the Evo, which puts more braking force to the front and doesn't lock up the unloaded rear wheel during trail braking.
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Old Jul 21, 2005 | 03:41 PM
  #36  
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Originally Posted by 992gnt
I get into the abs pretty regularly, but as soon as I feel it start I back off a bit on the pedal and modulate. To me it's a way of knowing where the traction threshold is without locking up and flat-spotting any tires.
That's something you shouldn't do. To modulate the pedal during the ABS braking....coz you are reducing the braking pressure and that can be very dangerous....but I am sure you know that, you sound like you know what you are doing...just my 2 cents
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Old Jul 21, 2005 | 03:59 PM
  #37  
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Originally Posted by whiterexman
In all honesty I was (I still am ) having a lot of problem adjusting my braking with my '05 RS. I've been tracking since '97 and all of my previous cars (TypeR, E36 M3, S2K and '03 EVO) all have ABS and the '05 RS was the first and the only one w/out.

The first time I took my '05 RS out to the track I was struggling with braking. Oh my god, it was soooooo ugly. I was locking up my tires left and right when trying to get a good feel on the brakes while practicing threshold braking. I put so many flat spots on my RA1 they were going like "thump-thump-thump-thump" on the front straight....

But my biggest problem during that track weekend with my RS was that I couldn't trail brake with it. I always ended up locking up my inside tire when I trail brake. It was very frustrating and I just can't seem to find the sweet spot with my brakes where I can rotate my car w/out locking up the inside tire.

The way I look at it is that ABS IS and CAN be a big advantage at the track unless you can brake like PROs. There is no question in my mind that an ABS EVO will out brake the RS every time at the track.

As of now I'm still posting slower lap time with my '05 RS compare to my old '03 even though the RS has front LSD and is faster on the straight..

Oh if you were wondering what happened to the trail braking..... Well, I simply just gave it up..... I went back to the basic and try to finished all the braking before turn in right now.

It seems like this is the only way for me to "not to" flat spot my race tires.

Tires are expensive, and I'm a cheap bastard on the budget.
I can relate to your frustration with the change from ABS to no ABS. You can certainly grow dependent on the ABS. But w/o ABS, you best bet is just to brake as smoothly as you possibly can and like yourself said get most of the braking done before the turn-in. Be patient. Try not to jump on the brake at the very last possible second at the beginning. Coz that would usually end up upsetting the car entering into a turn and you might just end up wobbling (rear overtaking front) all over the place and overcorrecting your entry and be really slow.

So, to answer the question of "To ABS or not to ABS?" The answer is if you have it, you certainly can take advantage of it. (It would be hard not to on track) If you don't have ABS, be really patient and learn to brake smoothly, not trail-braking, not late braking, smooth braking. Once you've learned and mastered the braking, once you get back on an ABS equipped vehicle, you will be flying!!!
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Old Jul 21, 2005 | 04:06 PM
  #38  
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Originally Posted by Richard EVO
It's easy to track in an RS without ABS. Just brake a little earlier. It's also easy to trail brake in the RS, but it in most cases it will just slow you down. Hit the brakes before the turn and then get right back on the gas.
Agree. Read my post above this. This is exactly what I meant.
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Old Jul 21, 2005 | 04:13 PM
  #39  
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Originally Posted by HMSevo8
..... ABS shouldn't be necessary with good threshhold braking.....
Yup.
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Old Jul 21, 2005 | 04:15 PM
  #40  
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Originally Posted by machron1
....Most people without super aggressive pads will not be able to activate the ABS anyway regardless of how hard they press the pedal......

Are you sure? I don't think so....
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Old Jul 21, 2005 | 04:21 PM
  #41  
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Originally Posted by CincyEvo
Trail braking is an art and allows a skilled driver to often post better lap times than without trail braking. Avoiding the spin can be challenging but a little countersteering helps. So, ABS enhances the advantage trail braking provides. ABS also facillitates left foot braking as "pedal feel" is irrelevant: you just mash down the brake and ABS takes over (no need to carefully monitor wheel lockup-skidding). All of which shows that having ABS doesn't remove driver skill from the equation of achieving fast laps, it could be just the opposite.

Don't listen to anyone who tells you to just "mash" you brake or gas. Yes, you might not lock up your brakes because of the ABS. But not locking up your brakes doesn't mean you are not abruptly upsetting the weight-transfer of your car, especially especially on a race track. Coz if you do things abruptly...you will just end up understeering=running off track, oversteering=spinning at the turns.

So, don't ever mash your pedals. Learn to be smooth, firm and progressive with them.

Last edited by TriCycle STI C; Jul 21, 2005 at 04:47 PM.
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Old Jul 21, 2005 | 04:46 PM
  #42  
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Originally Posted by TriCycle STI C
Are you sure? I don't think so....
I was talking about on the track of course. I wasn't talking about STANDING on the brakes, I just meant no matter how hard you press you won't be locking up your ABS because most street and mildly aggressive pads with grippy tires won't have the bite necessary to lock them up after they are up to temperature. I guess it would depend on the track as well, but I brake pretty hard and even with Hawk Blues I have never activated ABS. I have felt EBD helping me along, but never the ABS.
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Old Jul 21, 2005 | 04:56 PM
  #43  
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Originally Posted by machron1
I was talking about on the track of course. I wasn't talking about STANDING on the brakes, I just meant no matter how hard you press you won't be locking up your ABS because most street and mildly aggressive pads with grippy tires won't have the bite necessary to lock them up after they are up to temperature. I guess it would depend on the track as well, but I brake pretty hard and even with Hawk Blues I have never activated ABS. I have felt EBD helping me along, but never the ABS.
The majority of drivers on the street and on track don't break hard enough. I don't know if you have heard this before. But that's the common things for many people. In you situation, it sounds like you (and I'm just guessing) are not braking hard enough. But it would be hard for you to gauge since unless you have someone (like a instructor) sit shotgun with you or drive your car with you sitting shotgun, you can't really tell if you are braking enough. You might think you are, but you might very well not. So, if I were you, I would do just that--have someone drive your car with you on track or vice versa, get a 2nd opinion coz after all you are the one who will benefit most when your braking techniques improve.

On another thought, I might've misunderstood you all together if you are talking about brake fade on track with OEM pads. But my understanding is that the OEM pads actually perform very well with very little fade. Perhaps you have different pads and have different experience.
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Old Jul 21, 2005 | 05:04 PM
  #44  
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Originally Posted by TriCycle STI C
The majority of drivers on the street and on track don't break hard enough. I don't know if you have heard this before. But that's the common things for many people. In you situation, it sounds like you (and I'm just guessing) are not braking hard enough. But it would be hard for you to gauge since unless you have someone (like a instructor) sit shotgun with you or drive your car with you sitting shotgun, you can't really tell if you are braking enough. You might think you are, but you might very well not. So, if I were you, I would do just that--have someone drive your car with you on track or vice versa, get a 2nd opinion coz after all you are the one who will benefit most when your braking techniques improve.

On another thought, I might've misunderstood you all together if you are talking about brake fade on track with OEM pads. But my understanding is that the OEM pads actually perform very well with very little fade. Perhaps you have different pads and have different experience.
Even with Hawk Blues I am braking at the threshold of brake fade before the threshold of the tires, and I'm not even running R compounds. I've tried braking later and harder, which results in exciting chicane entries a little sideways scrubbing off speed from the long brake pedal and lack of slowing-down-ness. With Ferodo DS2500s, Hawk HPSs, and stock pads, at Portland International Raceway, I have to start my braking on the front straight at or around the start-finish line, well ahead of the braking signs. With the Hawk Blues I'm able to start braking between the 500 and 400 mark, but if I attempted anything at or beyond the 400 the pedal is very long by the time I get to the turn, and takes about a lap to recover. Impending tire lockup is pretty much out of the question, at least on that track in my car. YMMV of course. Also the new brake air guides I was using seemed to help my brake recovery. I am also normally running a fresh refill of Motul RBF600 or Ate Super Blue.

Your implication I am not braking hard enough in my case isn't founded, I'm braking as hard as I can captain

Last edited by machron1; Jul 21, 2005 at 05:07 PM.
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Old Jul 21, 2005 | 05:07 PM
  #45  
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Originally Posted by TriCycle STI C
The majority of drivers on the street and on track don't break hard enough. I don't know if you have heard this before. But that's the common things for many people. In you situation, it sounds like you (and I'm just guessing) are not braking hard enough. But it would be hard for you to gauge since unless you have someone (like a instructor) sit shotgun with you or drive your car with you sitting shotgun, you can't really tell if you are braking enough. You might think you are, but you might very well not. So, if I were you, I would do just that--have someone drive your car with you on track or vice versa, get a 2nd opinion coz after all you are the one who will benefit most when your braking techniques improve.

On another thought, I might've misunderstood you all together if you are talking about brake fade on track with OEM pads. But my understanding is that the OEM pads actually perform very well with very little fade. Perhaps you have different pads and have different experience.



If you are driving fast at all on the track, stock pads are crap. I can kill a set of stock pads in 1/2 a track day.


Percy
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