- 293
- Oxfordshire
- Bread_45
Hi All,
Since we don't have detailed telemetry in GT5, does anyone use replay mode to look at their car's behaviour during cornering, specifically camber?
Just to outline (and I'm sure most people in the tuning forum know this) you generally want to maximise grip by using camber to achieve the biggest contact patch possible. In GT5 we can set the static camber, but this will change as the body pitches/rolls and the suspension moves (dynamic camber). Theoretically speaking, during cornering you might expect to want the wheel to be perpendicular (flat) to the road for the best contact patch. IRL the tyre will deform (the outside tyre in a corner will get "dragged under" the car slightly). Thus you will actually want some negative camber relative to the road surface during cornering, so the tyre is dragged into a flat position when it deforms (you get camber thrust from this, which adds to cornering force).
Sadly, GT5 doesn't show tyre deformation visually, and we don't know if it models it. I was initially tuning so that, in a given corner, the outside wheels were vertical to the road. I've now been adding more negative camber so I can see the wheels angled inwards a bit when cornering. It seems to be a decent starting setting for a tune. If I change spring rates or roll bars, the suspension will move more or less, so the dynamic camber will change more or less - I check for this visually.
Also, when you steer, the front camber angle changes (steering axis inclination effect). In tight turns this can affect the amount of camber you're getting on the front wheels. I also check for this on replay mode. It's very noticeable when drifting, since countersteering makes the camber change the "wrong" way and sometimes you have to add starting camber to get the outside wheel vaguely vertical.
Does anyone else use replay mode for this purpose? Its hard to be quantitative (I guess you could take a photo and measure it up in an image editor to get the actual angles). I find I can at least make sure I'm not driving around with ridiculous angles.
Cheers,
Bread
Since we don't have detailed telemetry in GT5, does anyone use replay mode to look at their car's behaviour during cornering, specifically camber?
Just to outline (and I'm sure most people in the tuning forum know this) you generally want to maximise grip by using camber to achieve the biggest contact patch possible. In GT5 we can set the static camber, but this will change as the body pitches/rolls and the suspension moves (dynamic camber). Theoretically speaking, during cornering you might expect to want the wheel to be perpendicular (flat) to the road for the best contact patch. IRL the tyre will deform (the outside tyre in a corner will get "dragged under" the car slightly). Thus you will actually want some negative camber relative to the road surface during cornering, so the tyre is dragged into a flat position when it deforms (you get camber thrust from this, which adds to cornering force).
Sadly, GT5 doesn't show tyre deformation visually, and we don't know if it models it. I was initially tuning so that, in a given corner, the outside wheels were vertical to the road. I've now been adding more negative camber so I can see the wheels angled inwards a bit when cornering. It seems to be a decent starting setting for a tune. If I change spring rates or roll bars, the suspension will move more or less, so the dynamic camber will change more or less - I check for this visually.
Also, when you steer, the front camber angle changes (steering axis inclination effect). In tight turns this can affect the amount of camber you're getting on the front wheels. I also check for this on replay mode. It's very noticeable when drifting, since countersteering makes the camber change the "wrong" way and sometimes you have to add starting camber to get the outside wheel vaguely vertical.
Does anyone else use replay mode for this purpose? Its hard to be quantitative (I guess you could take a photo and measure it up in an image editor to get the actual angles). I find I can at least make sure I'm not driving around with ridiculous angles.
Cheers,
Bread
HAHHA
