What does the grip reduction option really do?

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bs13

bs13

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Does it only affect you when running in the rain or when you get off the track? If so what is considered off the track? For example: Is it one tire over the curb? Is it one tire on the apron? Two tires in the grass?
 
Dirt picks up on your tires and severely impacts your grip until it comes off.

And I believe the setting intends for rain to be more slidy, but never driven rain without it so I wouldn't know.

We have also noticed minor on track handling differences with the setting off, but are unable to explain these differences specifically.
 
Some already covered, this is from my own experience.

Grip Reduction set to Real

-When running off track, tires pick up dirt, tires will lose grip temporarily until dirt is scrubbed off. Usually a corner or 2.

-Tires work correctly in the wet. Slicks are the worst, followed by Sports, then Comfort, with wet weather tires (inters/rain) being the best. Depends on wet track %.

For example, Slicks can range from 0% - 30% as the track gets wetter. Sports tires are slower than slicks in the dry, but over 20% they perform better and can range up to 35~40%. Where Intermediates can be put on at 20% (any sooner and they wear out very quickly) they only become faster than slicks are 25% and can range up to approx 70%

%'s vary when track is going from wet to dry. Dry line appears on track on racing line sooner than off racing line.

- Racing line matters. More grip on the racing line, less grip off the racing line. Also in wet weather, racing line is more slippery than off the racing line.

When Grip Reduction set to low

-Running off track has less of an effect when rejoining track.

-Slick tires are the best tires in wet weather, all %'s.

-Grip across track is even, regardless of racing line/dampness.
 
Thanks for both or you replies. I have noticed the simulated grass or dirt sticking to the tires when grip reduction is real. Thanks for the confirmation.

On a dry track I thought that grip reduction on real only affected you on the track edge or off the track. So your saying with grip reduction on real it affects the driving line on a dry track? Is this also true on an oval track?
 
I imagine it's true for an oval track, but I don't do oval track racing so I don't know for sure.

With the road courses, it varies per track. You begin to notice it more with ABS=0, and some tracks more so than others. Laguna Seca for one, the first corner braking can vary if your off the racing line or right on it. It's easier to lock your tires off the racing line compared to being on it.

You also find grip during cornering is greater on the racing line, and running just off it can affect your speed through the corner greatly.
 
Thanks again. You confirmed another thing I saw the other night. We were racing online on the Daytona road course and our wheels kept locking up when we barely touched the brakes. It was absolutely ridiculous but maybe lowering the brake bias all the way down would have helped.
 

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