Played some Gran Turismo 6 recently again and... I had seen that option before, but seeing it again now "
MoTec telemetry data export" for GT6 replays, made me want to compare it AC's telemetry that can be exported in a MoTec compatible format with a an AC PC app that I have used before.
I chose the
BMW M6(edit:
M4, no idea how I messed that up), because it was added to GT6 after launch and should have the newest data and highest premium car model standards.
Did 10 laps at
Brands Hatch in each game and was surprised by how much faster GT6 is than Assetto Corsa. 1:37.xx vs 1:43.xx ...just how much more insane are those tires in GT6??
Turns out, the secret is not in the tires, it's the
rev limiter. In AC the rev limiter hits at ~
7510rpm(can overshoot to 7524) and in GT6 it's exactly at
8000rpm. More power means I reach higher speeds on every straight in GT6.
AC values are in
green.
Now to the
tires (assuming suspension, ride height and aero aren't too different between cars and games) - I left the GT6 at the "Sports Hard" compound which is the standard tire for production cars over $40,000. In AC I tried the "Street" compound first, but was 1:45 slow, so I put the "semi-slick" tire on which then led to my 1:43 later.
Longitudinally, there isn't too much difference. GT6 brakes a little better 1.55g compared to AC's 1.43. A very quick peak (but no tire lock) in GT was 1.66, weirdly enough that was going into the Clark Curve (last corner) and not uphill into the Druid's Bend.
Anyway, having more power at higher RPMs meant that I was faster, but also had to brake earlier due to higher speed, because the longitudinal tire grip wasn't
that different on average.
Here is a Histogram of Longitudinal Gs (GT6 in Orange, AC in blue):
You can see, GT6 can take higher Gs under braking, but AC is more constant and can reach similar braking distances this way. On the left of the graph, it becomes clear, how much more acceleration the 8000rpm can pull versus the 7500 in AC.
Laterally the difference is pretty significant. Look at the Hawthorne Bend, which doesn't have any real height differences(marked on the track map):
AC can do 1.35g, GT6 pulls 1.47g. Here GT6 just takes more Gs:
I wonder, how much faster GT would still be if the rev limiter would hit at ~7500 too. Right now, I'm good though. More testing if GT Sport still supports telemetry export.
[something else really cool from GT6: It also exports fake GPS data with the telemetry that you can export from the MoTec app to Google Earth and then can see your driving line on a satelite foto and even animate a tour on that path]
