I give you the breakdown for beating race 47 of tempest 3 tier 4 with the Ford 2005 GT. The challenge is a 1.37x 0-60 for race 47. The 2005 GT will beat all other challenges easily using no stage 6s. But when it comes to that sprint, you need the car fully maxed with all stage 6s and fusions. This makes this car not as great an option for tempest 3 tier 4 unless you maxed it out. Alternatively simply swap out for a quick sprint tier 4 on race 47 only. Which will cost you 400 gold or so.
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