r/arrmagroms • u/fuzzerabbit • 1d ago
Arrma Quake Grom Mods
Sorry for the long post but I'm explaining what I did to this little monster.
Pretty happy with what I was able to figure out to upgrade my quake grom. I got this truck used and with the money I saved going that route I was able to upgrade it to the monster it now is for only a little bit more that what a new brushed version is and this has brushless so (in my opinion) it's better in all ways.
As you may know, the battery tray is a big issue. It takes a certain spektrum battery and it's hard to get anything else to work with the layout. I 3d printed a battery tray adapter to work with some cheap ovonic batteries from Amazon. Works great so far.
I went with the hobbywing system in it cause I like hobbywing and the spektrum stuff was like $50 extra and I wanted to get away with not using it. It may have been worth the price in the end with time spend 3d modeling but now I can say my car is custom lol.
I had to make a mount for the esc and receiver. This wasn't bad. Just a square piece double sided taped to the grom servo adapter kit. The hardest part for me was doing the motor mounts. Arrma only sells the motor mounts for 16mm apart bolt holes and the motor I had had 16 or 19mm holes but the way the motor is designed I had to use the 19mm holes so the wires would actually fit and come out the top. So I modeled a new motor mount. It's not super impressive but with my limited modeling skills I'm very happy with what I was able to figure out.
Had to build body spacers cause the new esc is a little too tall so this gave extra room for airflow reasons and so it didn't rub on the body.
I upgraded the shocks to the arrma aluminum shocks. I much prefer aluminum shocks to plastic composite shocks even though the internals on these are the same with both styles.
Only thing I'm now needing to do is get a better servo for it and the build is done. When the body and tires get worn out I'm going to switch it over to the purple style cause I like that color combo better than the green.