JimmyWang
Member
- Location
- Chicago, IL
From reading the reviews on some car magazines, I am always wondering why the 2nd Gen FX35 with only 28 more horses and slightly less torque can shave 1 sec to 60mph from the 1st Gen FX35. I did some research and have one hypothesis. I know there are many knowledgeable members here and maybe they can help me (and other people interested in this) figure this out.
The major different besides the engine between 1st and 2nd Gen is the transmission. When checking the gear ratio
1st gen
I 3.54 6.7 44 mph (6600 rpm)
II 2.26 10.4 69 mph (6600 rpm)
III 1.47 16.1 106 mph (6600 rpm)
IV 1.00 23.7 140 mph (5900 rpm)
V 0.83 28.4 140 mph (4950 rpm)
final drive ratio:
3.69
2nd gen
I 4.89 5.1 34 mph (6800 rpm)
II 3.17 7.8 53 mph (6800 rpm)
III 2.03 12.2 83 mph (6800 rpm)
IV 1.41 17.5 119 mph (6800 rpm)
V 1.00 24.7 155 mph (6300 rpm)
VI 0.86 28.6 155 mph (5450 rpm)
VII 0.77 31.9 155 mph (4850 rpm)
final drive ratio:3.54
for the first two gears before hitting 60 mph, the gen2 has a gear advantage of 17.3(4.89*3.54): 13 and 11.22:8.33. This means that if the engine revs similarly, gen2 will put down roughly 26% more force to push the car ( since the wheel diameter is the same for gen1 and gen2, it also means 26% more torque).
The only downside on gen 2 is that it needs switch three gears to reach 60mph compare to 2 for gen1. But that only count for I would say, most a tenth of a second.
Using the same argument, gen2 is similar to a gen1 with a torque that is 262 ft-lb(gen2 torque)*1.26=330 ft-lb. And this is similar to a stage 2 Stillen supercharged gen1 hence I would think the 0-60mph performance of these two (gen2 vs. stage 2 Stillen gen 1) will be similar.
The major different besides the engine between 1st and 2nd Gen is the transmission. When checking the gear ratio
1st gen
I 3.54 6.7 44 mph (6600 rpm)
II 2.26 10.4 69 mph (6600 rpm)
III 1.47 16.1 106 mph (6600 rpm)
IV 1.00 23.7 140 mph (5900 rpm)
V 0.83 28.4 140 mph (4950 rpm)
final drive ratio:
3.69
2nd gen
I 4.89 5.1 34 mph (6800 rpm)
II 3.17 7.8 53 mph (6800 rpm)
III 2.03 12.2 83 mph (6800 rpm)
IV 1.41 17.5 119 mph (6800 rpm)
V 1.00 24.7 155 mph (6300 rpm)
VI 0.86 28.6 155 mph (5450 rpm)
VII 0.77 31.9 155 mph (4850 rpm)
final drive ratio:3.54
for the first two gears before hitting 60 mph, the gen2 has a gear advantage of 17.3(4.89*3.54): 13 and 11.22:8.33. This means that if the engine revs similarly, gen2 will put down roughly 26% more force to push the car ( since the wheel diameter is the same for gen1 and gen2, it also means 26% more torque).
The only downside on gen 2 is that it needs switch three gears to reach 60mph compare to 2 for gen1. But that only count for I would say, most a tenth of a second.
Using the same argument, gen2 is similar to a gen1 with a torque that is 262 ft-lb(gen2 torque)*1.26=330 ft-lb. And this is similar to a stage 2 Stillen supercharged gen1 hence I would think the 0-60mph performance of these two (gen2 vs. stage 2 Stillen gen 1) will be similar.
