Q: “This is a question I have been wondering about for some time now. I do informal track weekends in my 2011 BMW M3. I’m starting to add lightness and adding track parts through replacing things like the battery, lighter brakes, removing the rear seat, and adding aero. For this particular car, it is much easier to take weight out of the rear of the car than the front of the car. Is having less overall weight in the car more beneficial than a more weight-balanced car? Can aerodynamics be used to compensate for a car starting to lean towards a front-weight bias?”
Q: “I did a track day at NCM in the rain – not damp, but RAIN. Rain, as in standing water many inches deep against curbs, little rivers flowing, no visibility when following… you get the picture. Years ago, I thought you would lower your hot (coming off track) tire pressure to soften/make more compliant tires as you do for sway bars, shock settings, etc. However, a pro who’s name I won’t mention (but he’s won a “few” races in BMWs), suggested that lower pressure was flat wrong. He said you should increase your hot pressure significantly to help pump the water from under the contact patch. Since then, I’ve tried raising a couple of psi a few times and it didn’t hurt, but it wasn’t obviously better either. What’s your take? Raise pressures, lower pressures or the same in the rain?”
Q: “After your recent Improve Your Braking & Corner Entry webinar, I have two questions:
“1. Where is the EoB (End-of-Braking) point? Could it be defined as “when the car is under control and pointed where you want it to be”?
“2. Listening to tire squeal… first, in relation to the Slip Angle curve, where does tire squeal begin, near the peak, at the peak, or on the downslope? And when tires squeal, are we close to (or already in) pushing/front and/or getting loose/rear?”
Q: “My question is, why does the track get slippery when it gets really hot and how to adapt to it with my tire pressures, as that is really all I can change at the track?”
Q: “Where does one start to begin racing? I have looked at the Trans Am series (starting at the TA4 class) but there are so many series. Which does one chose? Is there a progression one should follow – maybe we start with HPDE days, then time trials, then getting licensed to race, then pick X organization to go with to race. What’s your advice?”
Q: “What do you think is the better way to go about things for someone who is running mid-pack average lap times for his racing class? A driver/pro coach or a pro school?”