I made significant modifications to many parts from OpenRC F1 by barspin. You will most likely not be able to use any parts from that build.
ACR Viper Model by stunner2211 has been modified to be able to print in multiple pieces assembled together using screws or dovetails. I have also fixed mesh in many places to make it printable.
WIP assembly information.
Some of the pieces that slide into each other may require some sanding depending on what resolution you print the model in.
There is ~0.1 to 0.2 mm tolerance in each part that slide into each other.
Most of the body parts are designed to require minimal supports however I recommend you set support threshold to at least 55 degrees at 0.2 mm layer height resolution.
You can print either the wheels or the rims to use with 63mm OD 48mm ID rubber tires. I have not tested the rims yet so they might require some tweaking.
Print 3 Front wheels/Rims and 1 rear wheel/Rims. One of the front wheels is used as a rear wheel for differential drive.
I added holes to front wheel axle to add reinforcement rods (1mm dia paper clip) to increase strength. Alternatively you can print ones without holes. Printing them at 100% infill is recommended to reduce risk of layer delamination.
I increased the size of the small differential gear to make it printable on my Ender 3. I was having trouble with printing anything smaller.
I used small pieces of 1mm diameter paper clip to hold the inner differential gears inside the main gear.
ESC: https://amzn.com/B07792FPD8 Battery: https://amzn.com/B085Q3Q28V Steering Servo: https://amzn.com/B07L6FZVT1 Motor: Any 35T motor will do. Keep in mind mounting screw distance of 25mm. Any 2 Channel RC Transmitter and Receiver will work
2 pcs - 12x18x4mm Bearings 6 pcs - 8x12x3.5mm Bearings Several Flat and Button or socket head M3 screws and nuts (WIP)