R/C Tech Forums - View Single Post - Spec R S2
Thread: Spec R S2
View Single Post
Old 10-20-2014, 07:05 AM
  #67  
DBM
Tech Fanatic
 
Join Date: Feb 2014
Location: Saskatoon, Canada
Posts: 911
Default

Originally Posted by slakr
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.
DBM is offline