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Maximum G's?

Old Dec 10, 2016 | 11:14 PM
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Default Maximum G's?

Curious what you all are seeing for max G's lateral and forward/back?

Mine currently after reset 800 miles ago, stock car with fully front/rear aero maxed out

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Old Dec 11, 2016 | 04:26 PM
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I usually reset before and sometimes during an autocross. Looks like the last one was 1.13 braking, 0.87 accel, 1.58 left, 1.1 or 1.2 something right. I find it's not unusual to see a 1.4x or 1.5x lateral during autocross. Presumably instantaneous -- the OEM tires can't sustain that. Putting on top autocross R compounds would increase the numbers some.

I'd be scared if I was seeing that on the street.
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Old Dec 11, 2016 | 04:59 PM
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I've seen as high as 1.7 Gs to the left and 1.5 under braking on the track. RE71R tires. I have a feeling the 1.7 was from a small oversteer situation I encountered.
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Old Dec 11, 2016 | 05:23 PM
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Hockenheim F1 track today, mostly damp conditions, one run in dry conditions. 45°F, cloudy.




Saw 1.5g under braking once, never seen more than 1.4g cornering, car broke loose just after that level.
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Old Dec 11, 2016 | 05:27 PM
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Old Dec 11, 2016 | 09:15 PM
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deleted (was my GT3 data)
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Old Dec 12, 2016 | 11:46 AM
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I don't have a G meter on my "stripper" GT4 but I do have an AiM Data system. Here's a screen shot of a days laps at a Watkins Glen DE.
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File Type: jpg
Channel Report.jpg (390.2 KB, 1297 views)
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Old Dec 12, 2016 | 12:18 PM
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Here's mine after a day at Road Atlanta...

Screenshot_20161211-134901_zpssju43lzq.png
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Old Dec 12, 2016 | 01:07 PM
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the most significant attribute that drives G-Force are the tires. I bet Bill was running Hoosiers at the glenn and thus the higher G values....

there is a big difference between peaks and sustained.

my experiences is that the Cup2 and RE71R can sustain 1.35 ish (track surface also comes into play as well as temperatures)
you will see peaks around1.6 on above tires when you hit curbs in a hard corner.

I don't have Hoosier data
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Old Dec 12, 2016 | 02:49 PM
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Yes, That shot is on Hoosiers. Here's RE71 data.
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RE71 Gs.png (172.8 KB, 1220 views)
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Old Dec 12, 2016 | 04:33 PM
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Originally Posted by Bill Lehman
I don't have a G meter on my "stripper" GT4
$20 for the thank-you-box will fix that, simple tick for G meter and gear change indicator.
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Old Aug 27, 2023 | 12:54 PM
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Default 1.8Gs w/GT4RS @ PECATL

My instructor showed me 1.8 on the GT4RS dash before I blew it up.
Probably due to the corkscrew and carousel with elevation changes on the new West Track.
Kept up with a landing jetliner on the back straight (do the math).
Not sure we were supposed to be doing 10/10ths, so please keep on the down-low.
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Old Aug 27, 2023 | 01:49 PM
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LOL I did not know that thing stored your highest readings. Rather impressed that my otherwise stock 981 Cayman S did 151 L 144 R and 141 B. However that was w/ Nankangs, SRF, and Ferodo 3.12s. Acceleration only 47 even w/ Sport Chrono Plus; definitely need more power!
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