by Ross Bentley | Sep 16, 2019 | Ask Ross
Q: Until this year, I have been driving a Cayman street car that was modified (suspension, roll bar, etc.) for track use. This setup was a compromise between track performance and drivability on the streets. Over the winter, I purchased a used Cayman race car that ran in the IMSA ST class. A friend who is an SCCA racer, looked at one of my track videos from VIR and explained that the car is set up for people graduating from karting to racing. In his opinion, the car rotates very easily in the corners and he recommended avoiding trail braking in the car. When I was at Watkins Glen last month, I noticed that if I released the brakes too quickly, the back end would tend to come around fairly quickly. In retrospect, I believe this is what you and Peter discuss in your track walks that I was never able to replicate in my previous car, so it caught me off guard, but I was able maintain my composure and control of the vehicle. What’s the best way to adapt my driving to the way my car handles?
by Ross Bentley | Aug 12, 2019 | Ask Ross
Q: “My question is what effect does stiffening the front sway bar have on a front wheel drive car. My Mini Cooper is a track-only, highly-modified over-sized go-kart and I have the ability to stiffen the aftermarket front bar, however I am curious as to what effect it will on handling. If it will make it understeer more I don’t need that. If, in theory, it will tend to make it rotate better, that would be a good thing. There is not a lot out there on how to make your FWD (front-wheel-drive) work better so I thought I would ask you.”
by Ross Bentley | Jul 1, 2019 | Ask Ross
Q: “I autocross a 2007 Z06 Corvette. It is modified and I just installed a softer sway bar in the rear to get rid of some traction issues after I softened up my Koni shocks to their softest. To make sure I don’t have any push issues in the front, should I add one swipe to the front shocks to just tighten them up? I appreciate your opinion.”
by Ross Bentley | Apr 8, 2019 | Ask Ross
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?”
by Ross Bentley | Apr 1, 2019 | Ask Ross
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?”
by Ross Bentley | Jun 4, 2018 | Ask Ross
Q: “I am driving a 2000 Porsche Boxster S at Porsche Autocross events and when I drive my Boxster over a bumpy section my Traction Control comes on and slows my car. I don’t have a switch to turn off the TC. To help with traction should I lower the tire pressure? Would raising the rear spoiler help with this issue as well? The spoiler raises at 75 mph but I can raise manually.”
