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?”
Trevor Ashline joins me to talk about the latest in head and neck restraint devices, as well as all sorts of other safety related topics. As VP of Engineering and Product Development for Simpson Performance Products, and a motorsport enthusiast himself, he knows his stuff – and shares it with you in this show. Should a HANS or Hybrid-S device be used with airbags? With standard OEM Seatbelts? How long do these devices stay safe? How do they interact with seats and roll cages? These are just some of the topics we talk about.
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?”
Richard Kelley joins me to talk about his experience of capturing some of the most incredibly powerful images of F1 drivers from 1972 to 1984. His photos of Niki Lauda, James Hunt, Jackie Stewart, Alain Prost, Nelson Piquet, Gilles Villeneuve, and others will connect with you and either make you smile, get goose bumps, or cry. His perspective as someone who has closely observed some of the best drivers in the world, as well as raced himself, make his advice about visualization, situational awareness, and sensory input hugely valuable to every driver.
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?”