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2010 S2K Challenge #9 - Buttonwillow - 10/23/10

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Old Oct 28, 2010 | 09:56 PM
  #101  
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Originally Posted by 600rr_rocket,Oct 28 2010, 03:59 PM
I go into Riverside hot and somewhat high, and I end up scrubbing some speed in the middle as a result...even though I am flat-out
lol ur analysis cracked me up for some reason Ed!

so ur saying if u "don't" go into riverside that "hot" and "high" , u can gain more speed?

mayb just adjust ur line a lil bit?
I take a much wider line into riverside than pretty much every s2000 I've seen and looking at my data print out my car never stopped accelerating, not to mention having to lose speed even with your right foot to the floor!!

good discussion guys! keep those feedbacks coming!!
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Old Oct 28, 2010 | 10:17 PM
  #102  
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[QUOTE=momofoolio,Oct 28 2010, 09:56 PM]lol ur analysis cracked me up for some reason Ed!

so ur saying if u "don't" go into riverside that "hot" and "high" , u can gain more speed?

mayb just adjust ur line a lil bit?
I take a much wider line into riverside than pretty much every s2000 I've seen and looking at my data print out my car never stopped accelerating, not to mention having to lose speed even with your right foot to the floor!!

good discussion guys! keep those feedbacks coming!!
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Old Oct 28, 2010 | 10:22 PM
  #103  
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I might as well post Jeff Tyler's entire analysis of my hot lap. For those who don't know Jeff, he's a former Skip Barber instructor, former kart champ, RTA driver, Billy Johnson's childhood friend, and all-around good guy.

BTW, Nam thinks that if I correct my errors in Sunrise, Phil Hill, Sweeper, and Sunset (and stop shifting like a granny), I might be able to hit 1:57 assuming ideal weather conditions and somewhat fresh tires.

T1 - line is good IMO, just keep fine-tuning what you're doing. Personally I do one quick 5->3 downshift there; it looked like you were still grabbing 3rd while also trying to balance trail-braking.

T2 - IMO you can float a little more speed on entry. When you do this, it will push your exit radius out a bit more (but that's OK in an S2000 because you aren't worried about putting power down)

T3 - What I see is an abrupt turn-in with a constant-radius line and maintenance throttle. Try turning in sooner, with 'slow' hands and a long period of trail-braking. Then add significant steering as you approach the apex curb.

4-5-6 - fine, not much to say

Bus Stop - looked solid! Nice job. If you aren't going to downshift, you should practice getting comfortable left-foot-braking there. It's faster.

Riverside - make your turn-in a little bit sooner, so that during the first half of the corner you are near the right side of the track. There's more road camber down there and therefore more grip. Yes, this will push you out wider after exiting the corner but that is fine. If you need to lift in this corner, make the lift early on in the corner and squeeze back to full throttle as soon as possible (rather than lifting in the middle of the corner and not getting to full throttle until the exit; this is because you have a long straightaway ahead of you). After you exit Riverside, but before the Kink, that long black patch at 1:24 should pass directly underneath your car. Riverside is another corner where left-foot braking sometimes comes in handy and saves you time.

Lost Hill - I think you can float a little bit more speed on entry by braking a little bit later & using more trail-braking. You got to throttle a little early there, which tells me you could've carried more entry speed. Overall not bad at all though.

Sweeper - is your ABS working? lol. I don't think I've ever told anyone that their turn-in and entry speed was a little bit too early/fast at the Sweeper, but I think yours might've been! Overall it looked pretty good actually, but I think you slightly overcooked the entry. I think that during the first 1/3rd of this corner, you want to stay pretty close to the right side of the track. Once you're about 1/3rd of the way through, then let the car float out to about the middle of the track, or maybe 2/3rds of the way to the left. I don't think it is beneficial to go all the way over to the left side of the track in this corner; there is no rubber down out there and no grip. (The only car I can think of that would want to go all the way out there would be a high-hp FWD that needs to make its exit a straight line to put power down)

Sunset - Perfect!! That's what I'm talking about when I say "turn in with slow hands, and then add more steering as you approach the apex". Well done.


Overall - very solid, you've come a long way from when we met, lol. Just keep at it, focus on the details of what you're doing, work on consistency, etc. I think I've suggested before that you pick up the Skip Barber book 'Going Faster'. I think something like that would help you understand the physics of everything; so that rather than just listening to someone's advice, you can actually understand the "why" of everything and do more self-evaluating at the track.
[media]http://www.youtube.com/watch?v=DtRsgp9UtyA [/media]

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Old Oct 28, 2010 | 10:49 PM
  #104  
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[QUOTE=600rr_rocket,Oct 28 2010, 10:17 PM] Perhaps my quick analysis was a bit vague...let me clarify
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Old Oct 29, 2010 | 05:24 AM
  #105  
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I'm guessing this must be a typo in the original post but it says Nam pulled a 1:31.xx on stock suspension. Is a 1:30 even possible at BW?
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Old Oct 29, 2010 | 06:41 AM
  #106  
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Originally Posted by Whitefire818,Oct 29 2010, 05:24 AM
I'm guessing this must be a typo in the original post but it says Nam pulled a 1:31.xx on stock suspension. Is a 1:30 even possible at BW?
Oops...corrected!
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Old Oct 29, 2010 | 07:00 AM
  #107  
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Originally Posted by 600rr_rocket,Oct 29 2010, 07:41 AM
Oops...corrected!
Also might want to let one of the admins know about the correction so they can change the time on the front page to 2:01.1
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Old Oct 29, 2010 | 07:08 AM
  #108  
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Originally Posted by Whitefire818,Oct 29 2010, 07:00 AM
Also might want to let one of the admins know about the correction so they can change the time on the front page to 2:01.1
Message sent. Thanks again for catching that!
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Old Oct 29, 2010 | 07:22 AM
  #109  
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Ed,

For Riverside, I think Nam and Tyler are saying the same exact thing in terms of sacrificing entry speed for exit speed, they are just using different lines to achieve it.

In other words, feather the throttle enough so that when you get back on you stay on all the way through. Then just reduce that time you're feathering just a little bit every lap till you can no longer stay full throttle after the feathering.

-Fil
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Old Oct 29, 2010 | 08:43 AM
  #110  
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omfg this looks like so much fun... i wanna buy my S2000 CR NOW!
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