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Old 06-10-2014, 07:41 AM   #61
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Have one of these on the way for 17.5 Blinky TC.
Can anyone recommend a spur (manufacturer and number of teeth) and pinion (number of teeth) to help get me started?
Will be running on a medium sized outdoor asphalt track.
https://www.youtube.com/watch?v=0a9hI8BFbxo
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Old 06-11-2014, 02:32 PM   #62
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Confirmed ! Those orange o-rings in the diff swell up and make it tight
and notchy. I'm going to try the Spec-R X-Ring seals from the S1
diff.
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Old 10-04-2014, 04:23 AM   #63
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what is the ideal spur/pinion (48P) set up for this on a large indoor track? TIA!
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Old 10-19-2014, 11:15 PM   #64
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Im using associated orange O rings now.

they leak really well, but diff performs awesome, and can last a few races before it needs to be refilled.

Been running the car in VTA / GT (Scale Spec) in Seattle, and its doing pretty well!
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Old 10-19-2014, 11:22 PM   #65
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Quote:
Originally Posted by miles514 View Post
what is the ideal spur/pinion (48P) set up for this on a large indoor track? TIA!
I'd change it to 64 pitch to smooth it out.

Depends what class you're running?
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Old 10-19-2014, 11:57 PM   #66
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I'm using the tamiya TRF gear diff O-rings and my geardiff isn't leaking.
Very pleased about the car too.
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Old 10-20-2014, 07:05 AM   #67
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Quote:
Originally Posted by slakr View Post
Have one of these on the way for 17.5 Blinky TC.
Can anyone recommend a spur (manufacturer and number of teeth) and pinion (number of teeth) to help get me started?
Will be running on a medium sized outdoor asphalt track.
https://www.youtube.com/watch?v=0a9hI8BFbxo
Assuming the S2 uses the same center pulley/layshaft setup as the S1 and R1, I've had the best luck using 3racing spur gears. I run a 96t 64p in my R1 f I r 17.5 blinky, and 72t 48p in my S1 vta car. The 96t 64p in my 17.5 car allows me to run a good variety of ratios. I bought a Yeah Racing pinion set that has 41-46t pinions, and combined with the 86t spur, has been good for tiny to larg-ish indoor carpet tracks.
If you want to stick with 48p for outdoors, a 34t pinion will give you a 4.0 fdr which is a decent starting point.

Edit: I've also used Kimbrough spurs with ok results. They are a bit thicker than the 3racing ones so might have to pay with shims and spacers a bit. I also used tamiya ones and found them to fit much like the kimbrough, although the tamiya plastic seems a bit harder.
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Old 10-20-2014, 02:14 PM   #68
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Best spur I've used in my S1 is an Associated. It's a little thicker than the kit spur and takes up the play in the lay shaft.
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Old 10-20-2014, 11:00 PM   #69
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Using a panaracer spur.

its about 8-10% of the cars value

The associated ones are really good also, bought a few cheap ones to run outdoors.
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Old 10-24-2014, 01:39 AM   #70
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Been testing my S2 on carpet with a 17.5T and the car was very fast.
I was only able to pull out an extra 0.2s on my fastest laptime cause the car was already very stable and carried a lot of corner speed at the start of testing.
I started with a FDR of 5.75 with a motor timing of 15 on my speedpassion V3 MMM and i ended my testing with the motortiming set at 10 and an FDR of 5.45.
Still searching for another 0.2seconds to hit my target, but i'm sure it's doable.
Need to upload the propper software to my reventon pro esc, still using a modified software and i need the stock1 software.
So far the car is a blast to drive.
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Old 11-17-2014, 02:52 AM   #71
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Hello,

I got the s2 for my daughter racing car and it's running very well exept for the rear diff. The o-ring are way too big and give to much pressure inside the gears. Can somebody give me a link or references with suitables o-ring to solve the problem ?

Thanks.
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Old 11-17-2014, 04:10 AM   #72
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Quote:
Originally Posted by TheRealBigJim View Post
Hello,

I got the s2 for my daughter racing car and it's running very well exept for the rear diff. The o-ring are way too big and give to much pressure inside the gears. Can somebody give me a link or references with suitables o-ring to solve the problem ?

Thanks.
I replaced the orange o-ring with the Spec-R X Rings. They seem a little small but have yet to leak (1 full race day).
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Old 11-17-2014, 06:51 AM   #73
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Quote:
Originally Posted by TheRealBigJim View Post
Hello,

I got the s2 for my daughter racing car and it's running very well exept for the rear diff. The o-ring are way too big and give to much pressure inside the gears. Can somebody give me a link or references with suitables o-ring to solve the problem ?

Thanks.
you can fix the problem with Tamiya TRF Diff Sealing O-Ring (red o-rings)
suits perfectly and no leaking problem at all.
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Old 11-18-2014, 12:06 AM   #74
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Quote:
Originally Posted by mooby64 View Post
I replaced the orange o-ring with the Spec-R X Rings. They seem a little small but have yet to leak (1 full race day).
Thank you i ordered some to test
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Old 11-18-2014, 12:09 AM   #75
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Originally Posted by Italboy View Post
you can fix the problem with Tamiya TRF Diff Sealing O-Ring (red o-rings)
suits perfectly and no leaking problem at all.
Hello,

thank you for your advice.

Are you talking about these one's :

rc-5mm-gear-diff-o-rings-42259
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