CUSCO RS 1 LSD(blue box) Compare to FD3S Torsen LSD (red box)@ Time attack
 

Not really a Rx7 stuff, but is Rotary and track relate

Same tire same suspension setting. blue line with 5.3 final drive and Cusco RS as you can see on the chat ,with 100% locking ability on Cusco RS .i was carry a more speed in to first left hand corner, but on the chicane specialy on sec one. even 5.3 i was carry a more speed but with clutch type on 100% lock ability on throttle it create a bit of exit understeer thus more turning angle on steering wheel and i was hestiate to give gas early but with Torsen, since is open diff before it lock i was able to really clip the apex, when tail kick out i know i can steer it with rear tail, so i punch the TP right open, with that and shorter distance i gain about .2 sec there