A further bit of math - accelerating from 1500rpm, stock, is 60ft-lbs from the engine, plus 36ft-lbs totaling 96ft-lb.
With lithium, that assist is increased to 72ft-lbs, totaling 132ft-lbs.
Assuming accelerating in 3rd gear, which is the typical passing gear on the highway, along with 12% shorter gearing, it would feel like the the stock car has 148ft-lbs, or 54% better acceleration.
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