Ask Ross

Q&A with Ross Bentley

 

Q: How should I break in new tires on the track to make them last longer?

Q: “The question I have is about heat treating to break in new tires and improve tire longevity. I usually heat cycle a set of tires for 20 minutes on a single session, then take the tires off and let them sit for 24 hours. I then put them back on for the remainder of the 2-3 day event. I run a set of tires for about half a season, ~4 events. Is there a better way of getting the tires ready for a season, and is there a normal life of tires that would indicate a replacement point? Could I run tires for a full season without suffering hardening and loss of grip?”

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Q: Which reference points are the most important when approaching & driving through race track corners?

Q: “I’m doing my yearly brush-up on the basics and realized that I’m thinking more about the start of throttle rather than the End-of-Braking. Pretty close in terms of where and when in the corner, but not quite! I also think about the point of full throttle to make sure I don’t get there too soon (or too late!). How do these three points rate in terms of importance? And if a driver gets one wrong, which one has the highest cost in terms of lap time? Which one can be compromised with the least penalty?”

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Q: How can a driver out-brake another on the outside of a corner like Lewis Hamilton tried on Max Verstappen in the Brazilian Grand Prix?

Q: “Here’s my conundrum. As a theoretical proposition, how is it possible to make an outside pass (I’m thinking of Lewis’ attempt in Brazil when Max pushed him off track)? In this example, it is assumed that these are perfect drivers who are absolutely at the limit. If Car A is ahead of Car B and takes the correct line through the turn – it seems to me that it should be impossible for Car B to pass Car A. Since Car B will be, by definition, off line, his maximum speed must be less than Car A’s. Thus, he can’t pass Car A. Or is it that outside passes are an attempt to freak out Driver A, and provoke him into a mistake? Or make Car A slow down?”

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Q: How do I go faster in my new Porsche Cayman?

Q: “I’ve recently gotten a Porsche Cayman for the track, and I’m a bit disappointed that I’m not a lot faster than I was in my previous car. Sure, I’m faster on the straights, but that’s just horsepower, and not me. I don’t seem to going any faster through the corners, which I think I should be. Am I wrong? What am I missing?”

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Q: Can and should I use the amount of wear on the upper sidewall of my tires to determine the best pressures?

Q: “My tires have a small, raised triangle on the sidewall, near the top of the tire where the tread starts. Local legend suggests optimum/maximum tire patch is gained when the sidewall deflection/rollover/rub line (chalking tires) just touches the tip of this triangle. Is this true/false, a quick-and-dirty gauge, or totally wrong? I’m not suggesting this method, if viable, is a replacement for temperature readings across the tire. However, I’m curious because as an HPDE-only type, I don’t have the equipment, crew, and track time to properly use the temperature gauge method. I noticed that my street tires – Michelin Pilot Super Sport 4S have a tiny Michelin Man in a similar spot as the triangle on the R888R’s. So, it’s gotta be there for a reason, right? The question is: For what purpose?”

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Q: Can you clarify what you mean by “collect the car” in double apex or “diamond” corners?

Q: “I am an instructor and often suggest to students that they review your Virtual Track Walks in preparation for a DE day. They have asked me, “What does he mean by “collect up” the car in turn 2? As you will recall, there is a discussion of racing ovals and using a “diamond” line. We teach either the single apex or a double apex approach. I can’t explain to them what you mean by “collect up.” When we teach double apex, we are taking a relatively fast, straight entry, braking to apex 1, releasing/rotating and driving to apex 2 and tracking out to the right side of the track. Perhaps the double apex approach with braking to Apex 1 and then turning is the same thing as “collecting up”, but I’m not sure.”

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