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Old 02-27-2009, 01:35 PM   #1
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Exclamation Small Pinion or larger Spur gear ?

When looking for a particular FDR or rollout.
If it better to use the smallest pinion or a larger spur gear
Or balance the 2 ? are there any ill consequences of choosing any of the above ?
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Old 02-27-2009, 01:43 PM   #2
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When looking for a particular FDR or rollout.
If it better to use the smallest pinion or a larger spur gear
Or balance the 2 ? are there any ill consequences of choosing any of the above ?
Depending on how small a pinion you are talking about... When they get TOO small they don't mesh well. I would try and balance the two I guess.
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Old 02-27-2009, 02:24 PM   #3
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If the are exactly the same final drive then there will be no performance change at all, it all depends on what fits in your car.
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Old 02-27-2009, 02:28 PM   #4
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If the are exactly the same final drive then there will be no performance change at all, it all depends on what fits in your car.
On a strictly theoretical basis that isn't quite true. Larger pinion and spur will have a higher moment of inertia and more weight so it would not accelerate as well but may have a better mesh and be more durable. In actual fact, no noticeable difference.
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