wbjones wrote:
Keith wrote:
wbjones wrote:
keep in mind that there is a very easy way to figure out if you have a LSD....
get yourself somewhere where the Man won't see you and lay a patch... if you leave twin tracks it's got the rear end locked up... peg leg.... no LSD...
With IRS and both wheels with the same traction level, that won't necessarily tell you anything. IRS cars don't unload one side the same way that live axle cars do.
ok guess I need a quick lesson here.. with all my open dif vehicles if I dump the clutch all I get is a single strip of rubber... in cars w/ LSD there is always 2 strips.... I just never have seen an open dif car lay 2 strips...
But in a 110 RWHP Miata, even dumping the clutch won't get you visual proof.
Or jack up the damn car and turn one wheel.
Jeez you guys like doing things the hard way.
Shawn
PaulY
Reader
11/26/09 12:40 a.m.
Trans_Maro wrote:
Or jack up the damn car and turn one wheel.
Jeez you guys like doing things the hard way.
Shawn
That doesn't work with a torsen. It's a torque multiplier, if there is no torque like in a completely unloaded condition, it's like multiplying by 0. In that case it behaves like an open diff and will spin the other axle the opposite direction.
I could just dump the clutch with the open diff in the GTI see how many I lay then do it again in a month or two when I get my quaife LSD installed.
the way I have always checked is by finding a paved road with a dirt shoulder. Put one tire in the dirt, and let her fly. If you spray dirt and don't move, you have an open diff. If you spray dirt, chirp tire and move, you have an LSD.
wbjones wrote:
ok guess I need a quick lesson here.. with all my open dif vehicles if I dump the clutch all I get is a single strip of rubber... in cars w/ LSD there is always 2 strips.... I just never have seen an open dif car lay 2 strips...
If both tires have the same amount of grip (or more accurately, depending on how the diff is constructed, the same amount of torque or differing amount of torque is sent to each wheel depending on its level of grip) both tires will spin at the same time. Very rarely in an open diff car can you get continuous both wheels spinning, usually it only happens for a second or two.
My old Neon ACR almost always spun both wheels when pointed dead straight. (SRT swap)... corners were another matter entirely.
My E30's seem to behave similiarly: two wheels spin when pointed straight on flat pavement, but clearly have open diffs through corners. The M3 very obviously has an LSD through corners with throttle exuberance at corner exit...
My MX6 will roast both tires, but it definitely doesn't have an LSD.
wow, any day you learn something new has not been wasted...
