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Open Track Racing
Heel/Toe shifting question
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<blockquote data-quote="95PGTTech" data-source="post: 5963804" data-attributes="member: 55701"><p>From my on-track experience, I would agree with the statement about you probably aren't protecting anything on a modern transmission other than the clutch a bit. I would agree, however, with some other people here who have posted that the real purpose is to keep the rear of the car in check and not wiggling all over the place under braking. This was most apparent to me when hotlapping Myrtle Beach Speedway. Coming into a banked (about 15 degrees) corner (it's a circle track) doing about 80mph and having to go down to around 30mph (they brought the cones in real low and tight to keep speeds down for the newer drivers), the whole car wants to go highside on you and it's constantly pulling you up. Under braking, it's obviously even worse, and the body is rolling to the outside pretty badly. When you push the clutch in, it seems to take away a lot of that roll for a split second because (I think) you're disconnecting the body from the drivetrain. As soon as you slip the clutch to the next lowest gear (about a half second, if that), the bodyroll comes back on strong and since, under braking, most of your weight is shifted to the front, the rear is really light and gets ALL over the place. I'm no pyshics major, and I don't have nearly the on-track time that some members do here, but that's the best seat of the pants dummy explanation I can give of what it feels like is going on.</p><p></p><p></p><p></p><p>more information please</p><p></p><p></p><p></p><p></p><p></p><p>Heel-toe is a skill I really want to learn as well - I currently have been toying with it with the method described in here of heel (or more the middle arch section) of foot on brake pedal and toe on the upper half of gas pedal, but it's awkward and difficult. Putting that video on my tuning laptop and playing it in-car while trying it in the driveway in the car off gives me these conclusions:</p><p></p><p>1) the clutch pedal is way too high - MM makes a kit for this</p><p>2) the brake and gas pedal should be equal levels, they are not</p><p>3) the whole seating position is too far to the left, making the pedals to the right. in the video, if you slow it down, his seat seems to put him in a position where if he puts his leg straight out, it rests exactly on the gas pedal. when I unbolted the seat and moved it like that, WOW it's actually possible to make that move. the stock pedal/seat position are already making you reach to the right, so doing it like he's doing is impossible for someone with my apparently limited flexibility.</p><p></p><p>I'm using a Sparco seat by the way, the bolsters are a lot higher than the stock one, so I can't just shift in my seat. Something will have to be addressed about these pedals.</p></blockquote><p></p>
[QUOTE="95PGTTech, post: 5963804, member: 55701"] From my on-track experience, I would agree with the statement about you probably aren't protecting anything on a modern transmission other than the clutch a bit. I would agree, however, with some other people here who have posted that the real purpose is to keep the rear of the car in check and not wiggling all over the place under braking. This was most apparent to me when hotlapping Myrtle Beach Speedway. Coming into a banked (about 15 degrees) corner (it's a circle track) doing about 80mph and having to go down to around 30mph (they brought the cones in real low and tight to keep speeds down for the newer drivers), the whole car wants to go highside on you and it's constantly pulling you up. Under braking, it's obviously even worse, and the body is rolling to the outside pretty badly. When you push the clutch in, it seems to take away a lot of that roll for a split second because (I think) you're disconnecting the body from the drivetrain. As soon as you slip the clutch to the next lowest gear (about a half second, if that), the bodyroll comes back on strong and since, under braking, most of your weight is shifted to the front, the rear is really light and gets ALL over the place. I'm no pyshics major, and I don't have nearly the on-track time that some members do here, but that's the best seat of the pants dummy explanation I can give of what it feels like is going on. more information please Heel-toe is a skill I really want to learn as well - I currently have been toying with it with the method described in here of heel (or more the middle arch section) of foot on brake pedal and toe on the upper half of gas pedal, but it's awkward and difficult. Putting that video on my tuning laptop and playing it in-car while trying it in the driveway in the car off gives me these conclusions: 1) the clutch pedal is way too high - MM makes a kit for this 2) the brake and gas pedal should be equal levels, they are not 3) the whole seating position is too far to the left, making the pedals to the right. in the video, if you slow it down, his seat seems to put him in a position where if he puts his leg straight out, it rests exactly on the gas pedal. when I unbolted the seat and moved it like that, WOW it's actually possible to make that move. the stock pedal/seat position are already making you reach to the right, so doing it like he's doing is impossible for someone with my apparently limited flexibility. I'm using a Sparco seat by the way, the bolsters are a lot higher than the stock one, so I can't just shift in my seat. Something will have to be addressed about these pedals. [/QUOTE]
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