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I gotta get my glasses checked: That looked like a Michelin Man to me at first, not an arrow!
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But, here is a more serious/useful comment.
Back in the 80s and 90s when we were autocrossing/racing, and tires were all higher and narrower, we used the 'chalk' method to verify optimum tire pressures for a course and ambient temperature. We didn't want the rubber to roll over.
BUT, with today's use of 'rubber band tires' with narrow sidewalls, is this practice still optimal? Those short tires won't roll IMO.
I now use an inexpensive non-contact pyrometer to look at tread temps across the width of the tire. I want the readings to be almost the same.
ADDED BENEFIT: When I'm not using the pyrometer to measure tires and underhood temps, I found that it's laser light pointer makes an EXCELLENT toy for our housecat!
Back in the 80s and 90s when we were autocrossing/racing, and tires were all higher and narrower, we used the 'chalk' method to verify optimum tire pressures for a course and ambient temperature. We didn't want the rubber to roll over.
Ha, that's exactly where I learned this method. However, I was taught that chalking was to find out the optimum tire patch area / most grip for each tire. Regardless, I like your way better, and I'll probably be out buying a laser thermometer at some point today. Plus I have a cat.
Read the triangles near the outside of the side wall and near the tread. When the wear from turning is at the tip of the triangle, you are at the optimum cornering pressure. Not touching the triangle - let air out. Too much wear on the triangle - add air. Some tires use a tiny logo instead of a triangle. Triangle is in the recess
i run my 2006 s type on the recomended 32 psi on all four wheels. Tyre shop wanted to pump them up tp 38, but on a previos car this resulted in a hard ride, with that familiar bup bup & vibration from even the smallest bump in the road. 32 gives a smoother softer ride.probably why that is the recomended pressure
You mean "Yes Officer, my car TOLD ME I was going at a low speed"
Takes the human factor out of it.
OTOH, anybody been pulled over for speeding in a posted 50 MPH or less, and the knowledgeable cop said "I know you were going at least 62 MPH because I saw the spoiler extended"?
I have never heard of that occurring even though many on this forum have pondered that circumstance.
I hope I have your question right...hard to tell from the answers.
i go 37# front and 35# rear. 2016 R awd
the track is a whole different topic
Originally Posted by guy
Very interesting thread. I’m always asking people to try and lower the pressure and report what they think.
Many are severely overly inflated.
so, just for fun, lower the fronts as well. (But not too much!). Let me know what you think.
That will result in mushy handling. If you want crisper handling, take the pressure in front to 38. Don’t run the rear below 36. Taking pressures to 32 will give you a Cadillac ride, not sports car handling.
