Originally Posted by Odin544
Hey guys. Looking at getting a Zero S for a VTA car. I've started reading the thread from the beginning and am finding contradictory information. Plus its from '10 so not sure if anything has changed since then. I want to keep this car as cheap as possible. So no aluminum unless I HAVE to have it. I saw there were issues with getting the correct gearing for the 25.5 and still being able to tighten down the motor. So what is everyones solution? Do I just need the vertical motor mount? Suggestions on gearing? Any help would be greatly appreciated!
19T center pullies and alloy spur gear holder are pretty much required as the front belt is too tight otherwise.
VTA gearing: You should start around 4.0 and adjust from there. I use 93T 64P spur and 46 or 47T pinion to get to close to 4.0 and still be able to move up or down 3-4 teeth on the pinion to adjust for track variables.
Vertial Motor Mount isn't required it's just a PITA to get the motor mounted without one as one of the motor screws will be behind the spur and you'll either need to do a lot of repositioning or make sure your spur has holes big enough to get your driver through them. You can keep the stock FRP top plate you'll just need to dremel out the center some to allow the VMM arm through.
Other than that you can run until something breaks or annoys you enough to change it out -- turnbuckles for example are annoying, but other than being hard to adjust they serve their purpose just fine.