How to calculate the Gear Ratio, Final Drive Ratio and Rollout
05-09-2011, 02:55 AM
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RE: How to calculate the Gear Ratio, Final Drive Ratio and Rollout
I'm going to try and pick the brains of the racers in Fitchburg before I show up there this summer. I want to start off with what I've got, but if they're all running something that seems to make more sense then I'll change up my gearing. I'm still adding spurs and pinions to both TA05s seperately. I can go 100/30 in the older car but not the same in the new one; it won't fit. They're two different gear ratios anyway, so it's even better to keep their gears seperate.
05-09-2011, 09:26 AM
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RE: How to calculate the Gear Ratio, Final Drive Ratio and Rollout
No I must have done something wrong. I gps'd the car earlier and did 24.5mph. I've used that estimator for my trucks and it's almost right on most of the time. I'll try getting my gearing again or something.
03-09-2013, 10:35 PM
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RE: How to calculate the Gear Ratio, Final Drive Ratio and Rollout
ORIGINAL: dragnse7en
<div>Rollout:</div><div></div><div>To calculate the rollout of the car’s gearing, you will need to measure the tire’s diameter in standard inches. Once that’s written down, calculate the circumference of the tire by multiplying it by Pi (3.14). One example would be a tire with a 2.44 inch dia. would have a cir. of 2.44 inches.</div><div></div><div>For example, using the numbers we already have:</div><div><span>2.44</span>/ 2.25 = 1.08</div><div>
<div>Rollout:</div><div></div><div>To calculate the rollout of the car’s gearing, you will need to measure the tire’s diameter in standard inches. Once that’s written down, calculate the circumference of the tire by multiplying it by Pi (3.14). One example would be a tire with a 2.44 inch dia. would have a cir. of 2.44 inches.</div><div></div><div>For example, using the numbers we already have:</div><div><span>2.44</span>/ 2.25 = 1.08</div><div>
I've marked the mistake in the OP's post in bold above.
Thanks!</div>
03-10-2013, 01:03 AM
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RE: How to calculate the Gear Ratio, Final Drive Ratio and Rollout
ORIGINAL: bsodmike
Just FYI for anyone coming across this, as I just did via Google - 2.44 in * pi = 7.67 inches, so the rollout should be 7.76/2.25 = 3.41
I've marked the mistake in the OP's post in bold above.
Thanks!</div>
ORIGINAL: dragnse7en
<div>Rollout:</div><div> </div><div>To calculate the rollout of the car’s gearing, you will need to measure the tire’s diameter in standard inches. Once that’s written down, calculate the circumference of the tire by multiplying it by Pi (3.14). One example would be a tire with a 2.44 inch dia. would have a cir. of 2.44 inches.</div><div> </div><div>For example, using the numbers we already have:</div><div><span>2.44 </span>/ 2.25 = 1.08</div><div>
<div>Rollout:</div><div> </div><div>To calculate the rollout of the car’s gearing, you will need to measure the tire’s diameter in standard inches. Once that’s written down, calculate the circumference of the tire by multiplying it by Pi (3.14). One example would be a tire with a 2.44 inch dia. would have a cir. of 2.44 inches.</div><div> </div><div>For example, using the numbers we already have:</div><div><span>2.44 </span>/ 2.25 = 1.08</div><div>
I've marked the mistake in the OP's post in bold above.
Thanks!</div>
Thanks.
