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NCC BMW CCA Fall HPDE, 2009

Sunrise at the Track

The GeorgeCo BMW powered by Beano put in a strong performance among higher horsepower cars this past weekend at Summit Point. The three-day school on the Jefferson Circuit was the last track weekend of the year for the National Capital Chapter.

Turn 7

We’re finally figuring out the skidpad and sustained oversteer. The key is to stay in second gear, dial in some mild understeer, as the front hooks up, wait, then blip the throttle. As the rear comes around, countersteer and hold the throttle steady.

Temperatures on the car were good all weekend. Tirewear has been fairly even. We’re getting some rubbing in the front on the new swaybar but that may be only an issue at full lock on the skidpad.

GeorgeCo BMW Powered by Beano

The biggest issue of the weekend is the ugly song the differential began singing on Saturday. We checked the fluid level and color and both were good. Temp was fine. It may just be in the last throws of death. Time to start checking craigslist.

Final Session, Part 1.

Final Session, Part 2.

Things to remember about this car on the Jeff counter-clockwise:

  • Turn 1: max entry speed; stay on the crown; trailbrake; put in lots of steering input; carry speed up the hill; don’t worry so much about track position for turn 2, just be back on-line for turn 3.
  • Turn 4: brake mid track; wait for the front to hook up; long apex; unwind the wheel on exit
  • Turn 5: stay mid track to avoid dip on entry; trailbrake slightly; head for accessroad; lots of steering input at the apex; avoid the patch; full gas well before apex
  • Turn 7: double apex. Brake late to carry speed up the hill, but don’t go deep; trailbrake; get on the throttle early; late second apex

Scott's MINI

NCC BMW CCA HPDE Shenandoah Circuit 5.29.09

MINI at the track

It was a beautiful weekend to be at the track. (Actually, there are no bad weekends to be at the track. Except maybe when it snows — been there, done that.) Except for a brief deluge, it was sunny and warm all three days. I really appreciate the Friday IA days. I get more track time in that one day than I do in the rest of the weekend. So much in fact, that I almost ran out of gas.

The two videos below show the last run session on Sunday for the A Group. The groups all had about 12 students each which was an ideal size for this track. We were also fairly close in speed, with a few faster than the MINI (OK, most) and a few slower. This was also the first time I’ve run with another MINI on the track that wasn’t driven by an instructor. It was cool to see the difference in performance between the R53 (mine) and the R56. With about 20% more torque, the new turbo really pulls away on the straight.

The skidpad was interesting. I don’t know what BSR has done to it, but you’d think a skidpad was supposed to be slick. This one had an amazing amount of grip, even when soaked. We were hitting speeds above 42MPH before getting any understeer. It wouldn’t be a problem except there isn’t much run-off area when you start to spin or push outside of the wet zone. I managed to get the MINI to oversteer by increasing the pressure differential between the front and rear tires. When the tires were cold, it really came around with just a throttle lift. When the tires were hot, we had to induce it with the E-brake.

not so slick skid pad

NCC BMW CCA HPDE Summit Point 3.17.09

Stealth at SPR

No, that’s not a vintage photo from 20 years ago. That’s from this past weekend at Summit Point. It was time for the annual Spring HPDE on the main circuit. It was a weekend of a number of firsts for me. First time out on R-comps; first time for this car; and first time on the track driving a rear-wheel drive car.

[The sound quality is poor. If you have a fast connection, click the HD button to get better picture quality once it starts playing.] The video doesn’t convey the sense of speed down the front straight. I was just touching on 120 before the braking zone. There may have been a bit more in the car, but since it’s more than 20 years old and has over 215,000 miles on it, I didn’t want to have to buy a new engine, so I didn’t push it. Since it’s so much quieter than the MINI, I often ran it out to 7,000 RPMs on the straight from turn 9 to 10 before I got my rhythm down.

Stealth

The car was much more like the MINI than I thought it would be. They are similar in weight and braking characteristics, thought the MINI brakes have more bite. It is very neutral in handling like the MINI, but no where near the amount of torque. You have to get on the power much sooner in corners and are rewarded with trailing throttle oversteer. Toward the end of Sunday, I felt as comfortable diving it into an apex as I did the MINI.

lining up

Here are a couple of things to remember for next time on the main circuit in this car.

  1. Between 2 and 3 don’t follow the edge of the track. Line up in the middle toward the gap in the tire wall, wait for the dip after the access road to turn in and use the camber on the inside.
  2. Tap the brakes right after the crest before 4 to settle the car, turn in, and full gas through the apex. Brake straight into 5.
  3. As soon as possible, get back on the gas in 5 to counteract the understeer. Go wide to keep up speed into 6. Position in 6 isn’t as important as a good set up to apex 7.
  4. Between 7 and 8 starts steady throttle to max gas at apex of 9. Try to get the shift into 4th gear before 9. Don’t early apex 9. (See M3 photo below.)
  5. Move the brake point for 10 back a bit. Key off of power lines. Brake less, carry more speed into corner, full gas through the apex. There is plenty of room to track out. An extra 3 MPH at exit is worth 10 MPH at the end of the straight. Remember to adjust brake zone into 1 with that in mind.
  6. Try to separate end of braking from turn-in in your mind as you adjust. Work on one thing at a time. If you can get on the gas before the apex, then your speed at turn-in isn’t high enough.


Is this on

Jefferson Circuit HPDE Summit Point 5.30.08

My driving season is split into two parts: there’s the first half that starts once the snow melts and ends when summer swimming starts. The second half picks up after summer swimming and ends around Thanksgiving. This past weekend with the NCCBMWCCA at Summit Point marked the end of the first half. And what a great way to end it. The video shows about a lap and a quarter in the counter-clockwise direction. (The camera mount is too low and it’s a bit overexposed, but it is good for recording corner entry and exit speeds.) It starts mid corner in Turn 7 and ends just after the start finish line a lap later.

Since I started in the Instructor Academy in March, I’ve been taking a day of vacation on Friday and making it a three day weekend at the track. The Friday sessions are great because you effectively double your track time and you get as much time on the skid pad as you normally get in a year of driving events.

I like driving on the Jeff. It’s a very short track and laps tick off rapidly at around 1:04 a lap (counter-clockwise, not that it’s officially timed either way….). You can pick one or two corners and really concentrate on getting them right. Before you know it, you right back at it again.

Here’s what I need to remember for next time. Counter-clockwise:

  • Exit the pits, stay off-line to the right, enter turn 1 on the inside and rejoin the line. It’s good practice for when you’re tired and you don’t check that someone is storming down the straight.
  • Left-foot brake from turn 2 to through turn 5. Tap the brakes between 2 and 3, try to accelerate in a straight line, but stay to the inside of 3. Don’t swing to the right like the RWD cars. Let the car drift to track center on the exit but don’t go too far out.
  • Come in for turn 4, but don’t force the car to the left. Speed is more important than clipping the apex. Don’t get on the apron for the entry to turn 5, there’s a dip and it upsets the car.
  • The turn-in to turn 5 is faster than you think. Tap the brakes to begin the turn, don’t bleed off too much, and get on the gas early. Track out but watch the bump on the apron at the edge.
  • Stay middle-right on the set up to turn six and carry more speed in to seven than you think at first. You want enough speed so that you don’t have to come off the brakes to make turn in to turn 7.
  • Go deeper into turn 7 and trail-brake to get the car to start to rotate. Get on the gas as soon as you’re pointed at the apex. Your best chance to pass is coming out of turn 4 and turn 7. Stay to the left, check gauges and relax. Rinse and repeat.

Clockwise:

  • Exiting the pits, stay off-line through turn 7 until you’re sure no one is closing rapidly on you. Turn six is a throw-away in this direction.
  • Go deep into turn 5. Use all of the road to the left. Trail-brake when comfortable with speed. Since you’ll be heading up hill out of 5, you can carry more speed than you think. Look through the apex to track-out. Stay off of the apron.
  • Tap the brakes to settle the car to turn-in to turn 4. Stay further to the left on turn in and try to straight line the braking zone and make it parallel to the dirt patch at the start of the curb.
  • Trail-brake to rotate into turn 3. The braking is hard-medium-hard. Try to straighten out to set up entry into turn 2.
  • Straight-line turn 2 as much as possible but don’t ride the curbs. Don’t go all the way to the right to set up for turn-in to turn 1.
  • In this direction, turn 1 takes patience, especially in the wet. There isn’t much grip in the dry and you have to be patient. Get the car to turn, get to the apex then get on the power. Turn in too early or power on too early and you’ll have to lift on exit. Your best chance to pass is coming out of 1. Pass on the left.
  • Turn 7 is a double-apex with no grip in the middle. There is good grip at the turn-in and about 3/4 of the way through. Hit the first apex, drift out to the middle but hold a steady arc, and come back in to the second apex and that sets you up for turn six. Get the arc right and you’re on full throttle as soon as you’ve made it through the slippery part mid turn. There will be puddles at the second apex in 7 and at the apex in 5 when it rains. Turn 5 has the most grip in the wet. Don’t use it to judge the rest of the track.

Some notes on car set-up:

  • I ran F39/R36 lbs cold pressure. This got me 41/38 hot and even temps across all four tires. The outside tires take much more of a beating on this track, but the fact that you can change direction and run both ways really helps with tire wear.
  • Tire temps were much closer front to rear than in the past. I take that as a sign that I’m working the rear tires harder and getting the car to rotate more. Some of that is probably due to the increase in front downforce from the splitter. Some (hopefully) from better driving and more trail-braking.
  • By effectively doubling my track miles and the increase in speed with the move up to A group, I’m going through a set of brake pads in the weekend. Rotor temps were as high as 650 degrees in the front. I’ve opened up the front to try to get more air in to the wheel well, but I’m going to need to go to a higher temp pad next time. I didn’t notice a lot of fade, but I used 80% of the pad in three days. The once green pad plates look like they’ve been sitting in the gas grill for a while.
  • I am going to have to get a RWD car if I ever want to graduate from the skid-pad though. There’s just no way to sustain oversteer as long as they require for the program.

NCC BMW CCA HPDE Summit Point 03.18.08

Mud Cooper S

The new driving season got off to a very good start this past weekend. I participated in the Spring driver’s school with the NCC Chapter BMW CCA at Summit Point, WV. It was my first time in the fastest run group (Group A) and first weekend in the instructor training program. By the end of the weekend, I was holding my own in the run group, but it was a big step up in the beginning.

Since they repaved the main circuit last Fall, it’s a fundamentally different road course — tons of grip and much smoother, but devoid of many visual cues to help with turn-in points and brake markers. They also paved over most of the aprons so there’s very little warning before you run out of road. For me lap times were down almost 10 seconds. About half of that is due to the paving along. Hopefully some of the rest is due to improvements in driving.

Summit Point

Here’s what I need to remember next time I go back so (hopefully) I can pick up where I left off:

  • Main Straight. Relax. Check gauges. Remember to tap brakes during the first lap out of the pits. Stay to the right after pit out; left when at speed. Don’t get too close to the left edge due to strong cross winds. Watch for deer. Shift into 5th before the pit out. Top Speed about 120 mph right before the braking zone.
  • Turn 1. Brake at about 200 foot mark. Corner entry speed is about 50 mph. Go deep and turn past 90 degrees by the apex. Apex is very late. Look for seam in pavement past the red and white apron. Let the car unwind into turn 2. Don’t think of turns 1 & 2 being a 180 degree turn. It’s more like a 130 degree turn followed by a 50 degree turn.
  • Turn 2. Let the car drift toward the dirt past the exit road. Shift into 4th. Line up toward the flagging station at turn 3. Stay to the right of the straight after the turn. Stay on the gas until reaching the braking point for turn 3.
  • Turn 3. Fast lefthander. Turn in point is between the two access roads. Look through the apex and turn in when it lines up with the exit point which is in the right kink before the gravel trap. Steady gas through the apex. 70-75 mph in the corner.
  • Turn 4. Act of faith. Crest the hill leading into turn 4 around 85 mph. Don’t tap the brakes. May have to lift to get the car pointing toward the apex. Steady gas through the apex. Gas up to braking point, then hard on the brakes. Downshift into 3rd. Trail brake if needed to get tight into turn 5. There’s more grip than you think after turn 4.
  • Turn 5. Tight apex. Get left front wheel into the slot between new and old pavement. Let car push to the outside after the apex under steady gas. Then hard on the gas and brake hard in a straight line before turn 6.
  • Turn 6. Tight apex and let car drift all the way to the other side of the track. Steady gas. Point car toward the silo.Turn 6
  • Turn 7. May have to lift to get the car tucked into the apex, but have to get the right line or else will blow 8 and 9. Steady gas. Shift into 4th as the car transitions right to left. Steady tire noise.
  • Turn 8. Watch for standing water on the left. Steady gas. Set-up for 9. Smooth transition.
  • Turn 9. Watch for mud on the inside. Steady gas. Let the car drift out, but in the damp don’t drift too far to the left. The left is off-camber and will throw you off track if you lift. Line up to cross under the bridge on the right third of the road. Steady gas to the top of the hill, will be on the rev limiter in 4th gear, but don’t shift. Top speed 100 mph.
  • Turn 10. Watch for water at the braking zone and turn-in. Light on the brakes in the dry. Slow car to 70 for the turn-in. Look for scallop in paving on the left, that’s the turn in point. Full gas through the apex and stay on it. Let the car drift out to the exit and stay on full gas to the braking point for turn 1.
  • Rinse & repeat.