Highest lateral G force grip after wheel / tire / suspension?
 

Modified FR-S / BRZ owners are commenting their cars handle significantly better than stock, so has anyone measured this grip improvement in a quantifiable manner?

Ex: some cars, like the Nissan GTR and new Fiat 500 Abarth display G forces during turns and accel / braking.

What is the highest turning grip you guys are recording on your modified FT86 cars and with what wheels, tires, suspension mods, and g force measuring device?

Transient g can be higher than sustained cornering but at the local track there is no steady state cornering. I am a little impressed by my peak (1.5g) but it is somewhat irrelevant in the grand scheme of going fast. One can generate high transients by jerking on the steering wheel but this will probably happen just before you go cross country off track.

This is data from a different car but the principles will hold for a twin. The peak of -1.76g was held for a total of 0.019 seconds. My takeaway is what it's always been: Peak lateral g-force numbers are entertaining. BTW, that car ran a peak of -1.97g in that turn during the same on-track session. Sensor: Crossbow CXL04LP3 4G Accelerometer.

Trace showing spiky lateral g-forces during two seconds in the middle of a turn in a high-downforce, race-tired race car:
http://i253.photobucket.com/albums/h...7.jpg~original

And a video showing the data in action:
[ame="https://www.youtube.com/watch?v=gO4Up84jqL8"]WGI Video of T1 to Go with Graph Showing Typical Spiky G-Force Trace - YouTube[/ame]

I sustained 1.48 g's through a long, 180 degree, lower speed corner at Miller Motorsports Park this weekend.

What are you trying to achieve exactly? Comparison of tire compounds? Or comparison of a wider tire to the stock tires? I think it's tough to accurately quantify differences in g-forces generated by switching tires - too many environmental factors at play. First off you'd have to swap the tires and do a test on the same day, same conditions, close to same time of day, same track/test area (preferably smooth), same wheels, same width, same tire pressures, both tires up to operating temps to really make an accurate quantifiable comparison in generated g-forces. Would be an interesting thing to see - but it's just one small metric among a huge number of factors that lead to better lap times (weight, operating temps, sidewall compliance, rim width, responsiveness, breakaway characteristics, etc). Most appraisals of tire performance are from lap times and driver feedback.

my fastest lap has less gs pulled in most corners compare to the times i try to beat that lap lol.

@CSG Mike ?

Smoother driving is better, got it. But if you can drive smoothly, while bringing the car to its limits you'll be even faster.

yeah, i agree, i was just mostly making the point that measuring g's is not the best way to measure if your driving faster.