On a recent run in the NC mountains my son measured 1.25 lateral g's in the 71 GS with global west all around, Michelin MXM4 235 wide tires, stock springs in the front, Moog cargo (progressive rate) springs in the back and Koni shocks. The questions for the PT guys here are as follows: 1. Any experience with the accuracy of the built in accelerometer in a smart phone. 2. Similar numbers with similar setups in the A Body? 3. Is this realistic? thanks!!!!
Based on my experience, where and how the phone is oriented might have some impact on it. My Samsung knows when it is level and how much angle it has. I've never actually used it for anything but observing but it appears to be pretty accurate in acceleration and such. It isn't hard to believe a well prepped car with excellent treads could pull a 1.25 lateral on a banked curve. I believe actual skid pad G numbers are on a flat piece of pavement. I could be wrong on both accounts. EDIT: Just checked, some NASCAR high banked tracks pull multiple Gs in the corners so I think you probably did see 1.25G without any doubt.
Thanks Greg. The HTC one was on his lap but probably not dead level. The curve was a relatively flat hairpin but climbing up. I had the windows down so I could hear the tires and they were just beginning to protest ray: so I think I found the limit. Not bad for a solid rear axel car. I did have a vapor lock at the top of the pass at 4100'.
That is always the plan. The picture looks like it is from US129 also in Western NC. I believe that stretch of road has the highest number of accidents per mile in the state.
The good old Tail of the Dragon you are correct. Been on her a couple of times with the Subaru gang but just for a pleasant law abiding look see.
Spike g's that high are reasonably possible, a bit of a slide in a corner and sudden grip as the tire regains traction can read quite high. The skidpad g's found in car tests are sustained g loads which are typically quite a bit lower.
