Originally Posted by
heretic
Actually my car feels more stable (especially on corner entry) with the tighter rear diff. It did decrease the turning radius a little bit as well but mostly it settled the car down. At this stage the car just feels better and is faster for me with a slightly tighter setting, period. I am not talking crazy tight, something that feels like maybe 10000 in a modern TC. I just have a hard time having a smooth diff for a long time with this setting.
Another question for you: what front-back weight bias would you recommend ? I saw you mention a heavier front in another thread, and apparently the pros do indeed run a heavier front on their TCs, at least on carpet.
It is worth saying that depending on your type of surface, grip level, suspension settings, whether or not you run a front spool, and things like that tightening your rear diff can cause either more or less rear grip. It's hard to predict, but easy to test.
I just seem to have a gift because every car I own, either touring, 1/12, or offroad, never has any problem generating front grip. Maybe I use too much sauce on the front but it's the way I found that I could make the car more consistent run-to-run and during the run.
As for weight distribution, most new touring cars built the way the instructions say to build it are a bit lighter in the front than the rear. I like a little more front bias, 50:50 or somewhat heavier in the front, as the increased forward bias takes away a little of the tendency to over-rotate on corner entry and makes the car easier to drive, smoothing out the transition between high-speed push and mid corner. It also gives a little more on-power steering and control because it keeps more weight on the front under power. The general rule of thumb is that increasing your cars rear-bias will give more turn-in, and lose grip on corner exit. There are exceptions to every rule, of course, so your results may vary.