Thanks for the input Mike.
I likely do more auto slalom than lapping, but I take the track more seriously, and do slalom more for fun.
I have had no issues with the car understeering with the stock differential. It's more that I found I couldn't get on the power exiting turns as early as I figure I should be able to.
Here's a video of the track I run at. You can see at T2 (tight left uphill) I struggle to put much power down without unstabilizing the rear.
The car has all whiteline products available for it, kw v3 coilovers, and ~ -3/-3 fr/rr camber. I currently run zero toe as I do DD the car in the summer, but I am open to mucking with some toe out to stabilize the car a bit on braking.
The car does make over the stock power. Around 280 wheel or so. That could climb to around 300 wheel next year.
From a lot of the reading I've done, many have suggested the 1.5 way for track use. When I brought this up on a local pro solo forum, an experienced driver suggested I would be better off with a 1 way due to the push/understeer I would realize with a 1.5way. I'm not sure what to think as I don't really know of a clear set of pros/cons of both.
I was leaning towards the OS Giken til now, but the Cusco RS seems to get a good rep, and would allow me to try both 1 way and 1.5 way and see what I prefer.
What measurable differences am I likely to see between the 1 and 1.5? Is there a significant benefit to 1.5 way in having a small amount of lockup on decel that I should consider? I see braking stability mentioned alot, but I'd love to hear your take on it, having used both.
Last point - I like to drive like a bit of a hooligan in closed course environments, and enjoy the ability to control oversteer and force slides when I want to. By no means am I constantly drifting around like a mad man, but I wouldn't want to make the car into an understeer machine in order to shave a few tenths at the track. I like having a tail happy car, and enjoy playing with the limits of grip.
Any insight or suggestions would be much appreciated.
Mike