ASK THE COACH
#226
Ok, what's the thought on this one ?
I have my own thoughts, but just curious on others thoughts.
http://www.streetfire.net/video/car-...&utm_term=img2
I have my own thoughts, but just curious on others thoughts.
http://www.streetfire.net/video/car-...&utm_term=img2
#227
Ok, I've got a question about instructing. How do you deal with instructing in a platform you're not very familiar with? How essential is it in advancing your instructing skills to get seat time in platforms foreign to you? For me in particular, I seem to have a poorer sense of what front engine cars can and can not do.
Experience helps, but at the end of the day the experience just helps make it more natural.
#228
Mike, I have run into this issue recently. Bouncing between a GTR, Cayman, Ferrari 430, then street 997S. As Viking says weight transfer and car balance is key. You may need to sit patiently for a lap or two and allow the driver to demonstrate what they are doing first. I then suggest using a slow speed corner to explore some limits of the car's transfer from under/oversteer. Pay a bunch of attention to how much steering input versus slip angle you feel. Watch where the car is going versus what the driver is doing about it. Ultimately, you would want to know the car from behind the wheel, but a bunch of improvements are to be made just working on the drivers inputs and tendency to put too much steering in.
#229
Thread Starter
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Joined: Aug 2006
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From: All Ate Up With Motor
Ok, what's the thought on this one ?
I have my own thoughts, but just curious on others thoughts.
http://www.streetfire.net/video/car-...&utm_term=img2
I have my own thoughts, but just curious on others thoughts.
http://www.streetfire.net/video/car-...&utm_term=img2
#230
Six days 'til my first DE ever. Sitting in the paddock - ready to roll...what is your advice to students at this point?
I've done two autocrosses and my times were pretty competitive or better than similar cars that have done it a while. Not nearly as good as those guys with tons of experience, race tires and setup cars. I know what the car feels like in under and oversteer (although @ AutoX speeds). My latest videos are on the Autocross section in the Performance & competition Section if anyone wants to sneak a peak. Run 1 was slowest @60.?s, Run 6 was fastest @56.5s - Run 7 would have been but I pushed too hard and oversteered it a bit at the end.
I've done two autocrosses and my times were pretty competitive or better than similar cars that have done it a while. Not nearly as good as those guys with tons of experience, race tires and setup cars. I know what the car feels like in under and oversteer (although @ AutoX speeds). My latest videos are on the Autocross section in the Performance & competition Section if anyone wants to sneak a peak. Run 1 was slowest @60.?s, Run 6 was fastest @56.5s - Run 7 would have been but I pushed too hard and oversteered it a bit at the end.
#232
I am going to have fun...oh yeah. I went into my 2nd AutoX with some of the advise here..."smooth inputs, one turn in, one turn out, trail brake, etc." and found that it is way different than on a nice track with large corners (relatively speaking). Each turn is like pulling into a parking spot at 40mph, traction on DOT's is all over the place. Definitely some of the basics apply...but on such a small, narrow, tight course...it is very different experience.
Which made me think - should we have "Ask the Coach for Racing & DE" and "Ask the Coach for Autocross" ? I am finding autocross let's me push the limits of the car at slower speeds and teaches me to learn the car's feedback - but at the same time it is much more sudden maneuvers than I would see at Road Atlanta for example.
Which made me think - should we have "Ask the Coach for Racing & DE" and "Ask the Coach for Autocross" ? I am finding autocross let's me push the limits of the car at slower speeds and teaches me to learn the car's feedback - but at the same time it is much more sudden maneuvers than I would see at Road Atlanta for example.
#233
Ok, what's the thought on this one ?
I have my own thoughts, but just curious on others thoughts.
http://www.streetfire.net/video/car-...&utm_term=img2
I have my own thoughts, but just curious on others thoughts.
http://www.streetfire.net/video/car-...&utm_term=img2
__________________
Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
#234
Oval turn to argue what apex to use? A. corner geometry dependent. B. Corner to straight versus corner to corner. Most oval drivers trail or roll to the apex with a lot of entry speed, then WOT at 85% of lateral G after peak. BTW you enter that wide and slow in a race and two cars will under you before the apex.
#235
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From: All Ate Up With Motor
this
and this
Oval turn to argue what apex to use? A. corner geometry dependent. B. Corner to straight versus corner to corner. Most oval drivers trail or roll to the apex with a lot of entry speed, then WOT at 85% of lateral G after peak. BTW you enter that wide and slow in a race and two cars will under you before the apex.
#236
#237
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From: All Ate Up With Motor
Yup. There is so much grip there. Everyone seems to want to set up the classic DE line: wide & late. No need to there. Plus, if you do, you end up pointing a to the right, away from the corner, and thus the car has to work extra-hard to rotate left.
#238
BTW, Dave it was to see you this week-end......
#239
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From: All Ate Up With Motor
Yes, agreed, same principle applies to T9, IMO, with some trail braking, again as long as you set the entry trajectory at least parallel to the track edge, if not slightly to the left, into the corner. In quali, enter wider to carry the speed. In the race? That'll get you passed every time.
#240
Thread Starter
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Joined: Aug 2006
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From: All Ate Up With Motor
Just received a question via PM that I will answer here:
"Are hot tire pressures or hot tire temps via probe pyrometer more important?"
Well...they both are. But if I have to choose, as this person wanted me to do, I would say hot temps, as long as they are taken via probe across the full tread (inner, middle, outer tread). In fact, this lesson was reinforced this past weekend at the Glen. One person I was coaching was refining their set up. We got hot pressures, they were right on the money. But he complained the car understered pretty significantly in a couple of key corners. We then got hot temperatures with the pyrometer. They gave us information that led us to lower front cold pressures by 1 psi. In the race, he pronouced the car as "handling on rails" and he was very, very fast.
"Are hot tire pressures or hot tire temps via probe pyrometer more important?"
Well...they both are. But if I have to choose, as this person wanted me to do, I would say hot temps, as long as they are taken via probe across the full tread (inner, middle, outer tread). In fact, this lesson was reinforced this past weekend at the Glen. One person I was coaching was refining their set up. We got hot pressures, they were right on the money. But he complained the car understered pretty significantly in a couple of key corners. We then got hot temperatures with the pyrometer. They gave us information that led us to lower front cold pressures by 1 psi. In the race, he pronouced the car as "handling on rails" and he was very, very fast.