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Old 07-14-2015, 12:30 AM   #1411
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Please correct me if I'm wrong, the standard driveshafts are 50mm. I'm looking for the shortest driveshafts and I've found CSO driveshafts that are 44mm. Does anyone know of any shorter driveshafts?
Xray measure their driveshaft lengths differently to everyone else. I have a feeling a 50mm Xray is about the same length as a Tamiya/Yok/Etc 44mm
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Old 07-15-2015, 05:47 PM   #1412
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did someone say drive shafts? Radtec 50mm and 52mm DCJ/ECS joints and many many other T4 hop-ups are now available at RocheRC USA
http://shop.rochercusa.com/index.php...ory&path=85_90
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Old 07-15-2015, 11:24 PM   #1413
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Could someone explain what is the use of a spur gear adapter? Specifically this part http://www.rcracingpro.com/car-parts...so-18093h.html
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Old 07-16-2015, 02:27 AM   #1414
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Could someone explain what is the use of a spur gear adapter? Specifically this part http://www.rcracingpro.com/car-parts...so-18093h.html
It's just an option part for the central layshaft that holds the spur gear and the 2 center pulleys. It's a little lighter than the stock piece because of the extra holes. Not really a huge gain from it. I have one of them and I had to correct the size of it to fit inside the 5x10 bearing.
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Old 07-16-2015, 03:24 AM   #1415
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It's just an option part for the central layshaft that holds the spur gear and the 2 center pulleys. It's a little lighter than the stock piece because of the extra holes. Not really a huge gain from it. I have one of them and I had to correct the size of it to fit inside the 5x10 bearing.
A CSO part that didn't fit correctly

Well that makes a change
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Old 07-16-2015, 03:36 AM   #1416
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Could someone explain what is the use of a spur gear adapter? Specifically this part http://www.rcracingpro.com/car-parts...so-18093h.html
+1 on other comments. Basically, it is less rotating mass within the drive line to improve acceleration. I imagine it would be difficult to notice the difference in performance between the stock & aftermarket part.
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Old 07-16-2015, 10:51 AM   #1417
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Thanks for the advice.

I'm looking for steel/ metal spools and have found this one http://www.rcracingpro.com/car-parts...cso-20213.html

Has anyone used it or know of abou other metal spools?
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Old 07-16-2015, 11:14 AM   #1418
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Thanks for the advice.

I'm looking for steel/ metal spools and have found this one http://www.rcracingpro.com/car-parts...cso-20213.html

Has anyone used it or know of abou other metal spools?
Would just add to rotating mass and wear down the front belt faster.

I use the spring steel spool outdrives, because the composite outdrives can wear and break a bit too easily, but there's no need for a full metal spool.
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Old 07-16-2015, 11:31 AM   #1419
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Would faster rotation of the belts wear the spool?
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Old 07-16-2015, 11:39 AM   #1420
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Also I'm looking to run thicker belts (4mm-6mm), is there any spool that would allow this?
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Old 07-16-2015, 11:41 AM   #1421
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Also I'm looking to run thicker belts (4mm-6mm), is there any spool that would allow this?
Wider or thicker?

If wider, that would be awfully difficult as you'd need a wider layshaft pulley and a wider top deck slot, etc...
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Old 07-16-2015, 11:45 AM   #1422
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Originally Posted by cbs007 View Post
Thanks for the advice.

I'm looking for steel/ metal spools and have found this one http://www.rcracingpro.com/car-parts...cso-20213.html

Has anyone used it or know of abou other metal spools?
I've ran the cso aluminum spool. I took it out because it was too rough on the drive clips. Even in 17.5 I would have to change them after a race day. Sometimes one would be completely gone after a heat.
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Old 07-16-2015, 11:56 AM   #1423
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Sorry, I meant wider spool, wider layshaft pulleys, etc (kinda like a custom car),. I'm wondering whether there are any off the shelf parts or if I have to design and get the parts machined.
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Old 07-16-2015, 11:57 AM   #1424
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I've ran the cso aluminum spool. I took it out because it was too rough on the drive clips. Even in 17.5 I would have to change them after a race day. Sometimes one would be completely gone after a heat.
So the aluminium spools are of no use? Mainly trying to use for a speed run car, hence the faster rotation speed.
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Old 07-16-2015, 12:44 PM   #1425
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I have a boosted 4.5 in my mod car. Never had any issues with the composite spool. I've snapped a couple of belts over the years, but they were fairly worn by the time that happened and it was due to high grip acceleration and/or braking. That's not going to be an issue for speed runs.
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