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Old 10-09-2008, 09:44 AM   #7531
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hey guys, after assembling the tc5r with the upperdeck countersunk/o-ring screws-did you guys notice a slight bind between the spur gear and the two orange o-rings that sits underneath the two countersunk screws?

i saw the o-rings sort of chewed away but the spur is not touching the countersunk.

i confirmed everything is shimmed correctly as far as the spur gear center pulley assembley goes.

did anybody else experience this?

thanks
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Old 10-09-2008, 11:11 AM   #7532
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The o-ring shouldnt be sticking out from the washer. How tight do you have the screw?
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Old 10-09-2008, 12:02 PM   #7533
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Gearing question (TC5R). Running 17.5 brushless LRP motor with 3800 Orion Lipo, 64 pitch gearing. For an average size track (indoor carpet with rubber tires) what is a good starting point?

Both spur and pinions. Thanks for the help.
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Old 10-09-2008, 12:13 PM   #7534
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Originally Posted by Swampracer View Post
Gearing question (TC5R). Running 17.5 brushless LRP motor with 3800 Orion Lipo, 64 pitch gearing. For an average size track (indoor carpet with rubber tires) what is a good starting point?

Both spur and pinions. Thanks for the help.
With my Orion 17.5 rubber tire I was running 94/50 3.76FDR on a medium to large size track.
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Old 10-09-2008, 12:14 PM   #7535
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Originally Posted by Swampracer View Post
Gearing question (TC5R). Running 17.5 brushless LRP motor with 3800 Orion Lipo, 64 pitch gearing. For an average size track (indoor carpet with rubber tires) what is a good starting point?

Both spur and pinions. Thanks for the help.

When I had my TC5 I used a 100 tooth spur and 50+ tooth pinions. That will start you around a 4.0 fdr and you can go down from there.
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Old 10-09-2008, 12:24 PM   #7536
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The o-ring shouldnt be sticking out from the washer. How tight do you have the screw?
i got regular tight-not crazy tight but not loose either-all 4 orange rings stick out
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Old 10-09-2008, 12:24 PM   #7537
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should i loosen them so they dont stick out? duh
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Old 10-09-2008, 12:29 PM   #7538
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Quote:
Originally Posted by Swampracer View Post
Gearing question (TC5R). Running 17.5 brushless LRP motor with 3800 Orion Lipo, 64 pitch gearing. For an average size track (indoor carpet with rubber tires) what is a good starting point?

Both spur and pinions. Thanks for the help.
3.75 or so is usually about right. I also run a 100tooth spur and have been using a 53T pinion for a 3.77.

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should i loosen them so they dont stick out? duh
Yes they should be under the countersunk washer. Might try without the rings too if you use the ITF chassis and top deck...more resistant to tweak and I tried the rings but found I already had enough torsional flex without them.
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Old 10-09-2008, 01:00 PM   #7539
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Isn't that the point of the ITF chassis, so you DON'T need things like o-rings under the screws?
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Old 10-09-2008, 01:09 PM   #7540
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Isn't that the point of the ITF chassis, so you DON'T need things like o-rings under the screws?

I have done a fair amount of testing with both...simply the o-rings on the top deck create some inconsistencies in the car, but does not really add any additional roll. I find the car is simply better without them.
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Old 10-09-2008, 01:16 PM   #7541
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3.75 or so is usually about right. I also run a 100tooth spur and have been using a 53T pinion for a 3.77.

Yes they should be under the countersunk washer. Might try without the rings too if you use the ITF chassis and top deck...more resistant to tweak and I tried the rings but found I already had enough torsional flex without them.
i will try without the rings-- should i ditch the countersunk too?
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Old 10-09-2008, 01:36 PM   #7542
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Thanks for the input with the gearing question I had, but I must be missing something.

Do you divide the Spur gear number by the pinion size? 100T spur using a 50T pinion would be a 2 fdr? or am I forgetting something.

What company makes 50T pinions? What dose everyone use?

Thanks guys!!!
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Old 10-09-2008, 01:39 PM   #7543
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Originally Posted by Swampracer View Post
Thanks for the input with the gearing question I had, but I must be missing something.

Do you divide the Spur gear number by the pinion size? 100T spur using a 50T pinion would be a 2 fdr? or am I forgetting something.

What company makes 50T pinions? What dose everyone use?

Thanks guys!!!
FDR

Spur/pinion*IR=FDR
(IR=Internal Ratio)
(IR on a TC5 is 2.0)

100/50*2.0=4.0FDR
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Old 10-09-2008, 01:46 PM   #7544
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Quote:
Originally Posted by Swampracer View Post
Thanks for the input with the gearing question I had, but I must be missing something.

Do you divide the Spur gear number by the pinion size? 100T spur using a 50T pinion would be a 2 fdr? or am I forgetting something.

What company makes 50T pinions? What dose everyone use?

Thanks guys!!!
PRS makes pinions up to 65 teeth...and they are good quality too.

http://www.precisionracingsystems.com/catalog/4
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Old 10-09-2008, 02:07 PM   #7545
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Thanks guys.......for helping me out. I already placed a order through PRS.

Cheers
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