So i found an 03 evoIII for sale local to me and extremely interested in it, my question tho is from what i've read i understand the front lsd on the 03's is open then viscous mid, and the rear is clutch? how much of a performance difference, specifically turning capability is the open front compared to the 04+ helical? and is it worth upgrading? thanks!

 

open diff will understeer more than the same car with a front LSD.

I upgraded to the front helical LSD and it was deff worth it

 

The 2003 all-wheel-drive system uses a viscous-coupling center differential a 1.5-way clutch type rear diff, and an open front diff.

 

And how about evo VIII's set up ???

front ?
middle ?
rear ?

 

thanks!

sorry that was a typo i ment evo8 not 3 lol, i know its an open diff i really was interested in knowing how much a performance loss the open diff was compared to the helical in turns

 

Exactly what he posted. I have a helical LSD in my 2003 and absolutely love it