Viper ACR, under steering PIG?

123
RayderRN
I have tried all I know about reducing understeer, and this thing wont go around the indy track without having to slow to at least 170, anymore than that I the wall has to help turn the rest of the way, this thing has 1000 hp and its fun in a straight line, just wondering if this is just the fate of the cool car or is there a cool tuning trick that can fix it?

Current tune: lower 18 front and 15 rear
spring rate up 1.0 in front and 1.2 in rear
damper 7 front 8 rear
antiroll 5 front 6 rear
camber -1.7 Front -1.2 rear
toe -.10 front -.05 rear
 
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