What you guys are "feeling" is the fictional values in the Force Feedback programming which will vary wildly between sims, settings, and obviously wheels manufactures. Basically, none come anywhere near modeling a tire, let alone a tire under the strains and stresses of auto-racing. They do not model rubber elasticity, tread deformation, sidewall flex, friction, graining, etc. This is the same tire model that iRacing uses today (sorry guys, this is sad but fact) and models less than half with ISI does.Īll tire values in all games lack 90% of real-world tire values. NR4-2003 (same base physics as GPL) was released with some amount of tire modeling, though still no where near what ISI does in rFactor. ![]() GPL did not model tires at all, just blocks of 'stone' at the end of suspension pieces. rFactor is the next generation of that physics engine and more advanced, though in small steps. ISI licensed the use of that engine to Simbin to create GTR1, GTR2, RACE07, and all their addons. GTR1 and GTR2 are all built from the same ISI physics engine as the older EA Sports F1 games.
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