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Old 03-23-2004, 09:52 PM   #1
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Default Spur Gear

how many teeth does the stock TC3 spur gear have?
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Old 03-23-2004, 09:54 PM   #2
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Quote:
Originally posted by LancerEVO
how many teeth does the stock TC3 spur gear have?
72.. teeth..
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Old 03-23-2004, 09:59 PM   #3
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so what would my ratio be i have

24 tooth Pinion
72 Tooth Spur
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Old 03-23-2004, 10:01 PM   #4
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Quote:
Originally posted by LancerEVO
so what would my ratio be i have

24 tooth Pinion
72 Tooth Spur
7.50
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Old 03-23-2004, 10:03 PM   #5
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thanks alot but i got another question

i got a 19 T motor what pinion and spur gear should i get?
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Old 03-23-2004, 10:32 PM   #6
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Quote:
Originally posted by LancerEVO
thanks alot but i got another question

i got a 19 T motor what pinion and spur gear should i get?
Try 96-100 tooth spur gear and 36-40 pinion. I use this in both stock and 19t. It's a good combo
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Old 03-24-2004, 12:02 AM   #7
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Quote:
Originally posted by LancerEVO
so what would my ratio be i have

24 tooth Pinion
72 Tooth Spur
no it isnt 7.50....

you divide the spur number of teeth by the pinion number of teeth to get the ratio...in your case it would be 72/24=3.00
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Old 03-24-2004, 12:23 AM   #8
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so how fast should my car be????
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Old 03-24-2004, 12:36 AM   #9
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the lower the number in gear ratio the more top end or mph you will have...the higher the number the faster it will take off but lowers the mph
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Old 03-24-2004, 11:56 AM   #10
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Quote:
Originally posted by Brandon R
no it isnt 7.50....

you divide the spur number of teeth by the pinion number of teeth to get the ratio...in your case it would be 72/24=3.00
Yes it is 7.50.. you need to mutiply 3.0 by 2.5 ( the TC3's internal drive ratio.)
The formula for FDR: Spur/Pinion x your car's internal drive ratio= Final drive ratio
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Old 03-24-2004, 11:58 AM   #11
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Quote:
Originally posted by Brandon R
no it isnt 7.50....

you divide the spur number of teeth by the pinion number of teeth to get the ratio...in your case it would be 72/24=3.00
owned. you have to factor in the internal ratio, which i did.
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Old 03-24-2004, 12:00 PM   #12
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LOL AWOL.. good thing we agree. BrandonR- 0\/\/|\|3|)
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Old 03-24-2004, 12:32 PM   #13
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he asked what would his ratio be with 24 and 72 right? not final ratio with internals. so no not owned. Do you factor in the transmission ratio on a real car? NO so why factor them in on these? It makes it much easier to not factor that in.
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Old 03-24-2004, 01:50 PM   #14
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Quote:
Originally posted by Brandon R
he asked what would his ratio be with 24 and 72 right? not final ratio with internals. so no not owned. Do you factor in the transmission ratio on a real car? NO so why factor them in on these? It makes it much easier to not factor that in.
I think he meant to ask for final ratio as he isn't running a pan car w/direct drive so just the spur/pinion ratio wouldn't be too useful for him.

o wne d

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Old 03-24-2004, 03:50 PM   #15
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whats the difference between knowing the final ratio and the direct ratio? If he changes the pinion to a 30 and drops down to a 2.40 ratio does that mean it would do the same thing as calulating the final ratio? yes it will make everything the same thus no need to worry about final ratio unless you change the internal gears. Its much easier to tune the direct gear than worry about all the other stuff right? If you go through all that trouble i feel very sorry for you!!
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