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ERA Chas, not sure where your estimate is based or what you expertise in this area is, but 1.2 60' times usually require at least a drag radial and a drag race setup suspension, front and rear (proper instant center for the rear, springs and shocks). As you've seen from Jack, he gets 1.3 on a 9 sec run. Twin turbo is 1.7 on a 10 sec run. I get 1.7 on a mid-10 sec run as well, with a set up for road courses and running on Nitto NT01 tires, which are not a wrinkle wall drag tire. I'd be interested in your street car times since you seem to be providing advice to folks who are actally running pretty quick for street cars.