Quote:
Originally Posted by ajc209
...... the only reason closer gearing makes the car accelerate faster through the gears is because the average power the engine is putting out is closer to max power. If you had really wide gearing lets say you red line in 1st gear then shift up to second and it drops to 4k rpm. Ypur engine is now ptting approx 100hp or half of full power and revs need to build in order to build power. Now consider closer gearing where 2nd gear is at 5.5k rpm. The engine is outputting 175hp at those revs. So in the example above with the long gearing the engine is running from 150-200hp as it revs throught the gears, with the closer gearing the engine is running from 175-200hp as it revs through the gears. It easy to see that with closer gearing the engine is putting out more power on average, or area under the curve if you were to plot it on a graph.
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Your right thats part of it to.
Quote:
Originally Posted by ajc209
Nope. Sure you'll have tons of torque in first gear but the wheels wont be spinning very fast and thus they wont be donig any more work than in 4th gear. The only thing that will change the WHP is drivetrain losses in 1st gear vs 4th gear and rolling road losses because you are putting down mor torque - this is usually corrected to some extent.
Wrong again. That's when the gear box is 1:1 but the diff is 4.1:1 so the engine is turning 4.1 times per wheel rotation in 5th gear.
At 60MPH or 1Mile per minute you'd need to travel 1620 meters. Wheel circumference is 1.96M.
=> 1620/1.96 = 826 rotations per mile.
The engine isnt revving at 826 rpm at 60mph in 5th is it? try multiplying by 4.1 = 3389rpm.
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Lol yeah totally forgot the diff ratio hahahaha
my bad there