This build thread is to document my 4WD Trampa creation. I usually would do a verbal dump of a build after its completed but I wanted to do it different this time around.
I have taken inspiration from @glyphiks 4WD custom monster build. Unfortunately I am not as talented as Al when it comes to battery building and enclosure making so I am making do with what I know and what I have available.
I wanted to bring this build to life because I have yet to see a DIY 4WD AT board here in Sydney, Australia, and so I figured I would give it a crack myself. Failure or Success, it will be a learning process.
I choose a Trampa holy pro 35 17ply deck with infinity trucks and superstar hubs because my very first DIY board was built on the same platform and that build continues to serve me well today. The deck was ordered and delivered in less than a week which is damn impressive considering the current covid situation we find ourselves in. Shout out to @Trampa and his team.
I am using 2x Focbox Unity’s which will be powered by a 12s2p 20ah lipo battery pack mounted on top of the deck. I got the Unity’s of @elitejarcool they were the last 2 he had left in his stock.
I have done some work on the unity’s and the enclosures they are mounted in so far and I think they turned out well. The Unity’s are housed in 2 individual faux pelican cases purchased from Jaycar Electronics. I was unable to get a large enough plate of 5mm thick aluminium so I made do with 2x 50mm x 160mm x 3mm aluminium plates placed side by side to act as a ghetto heatsink. I don’t think it will be enough to dissipate the heat generated but something is better than nothing.
The 2 aluminium plates are bolted together with 2 smaller aluminium rails which lifts the aluminium plates away from the enclosure hopefully allowing the plates to also clear the hanger bolts which are used to secure the enclosure to the deck.
Battery and battery enclosure:
The battery box that I have chosen comes from RS Components. It was chosen as it had the right dimensions to fit the batteries, BMS and battery indicator without too much fuss. Dimensions are 240mm x 190mm x 105mm
The batteries I wanted to use are 4x 6s1p 10ah to make a 12s2p 20ah pack. The batteries are on backorder so it will be a waiting game for them to come back in stock.
I am using 4x TorqueBoards 6355 190kv motors. I had a pair for another project that never got off the ground so they were repurposed for this project and I had ordered 2 more which only recent arrived. Hats off to @torqueboards for the fast shipping.
I will upload better photos of the Motors and Battery box once I am back home.
I will be rocking 2 sets of the E-toxx 5:1 helical gear drives. I have a 5:1 straight cut spur gear setup on my other DIY Trampa and they have survived 2000+ km’s and I have only ever needed to replace the bearings in the wheel gear. For me it was a no brainer to continue to rock the E-toxx units because I know they can stand the test of time. Thanks @NoWind for putting up with my stupid questions via email lol
This is what it looks like partially mocked up
I am only missing some key parts at the moment.
- 4x 6s1p 10ah lipo’s from hobby king (back order)
- 2.4ghz Mini remote (Ordered)
More updates to come as more parts come in and more progress is made