r_drawviewmodel 0 makes the Racer texture look weird
0 Racer looks like this on 1st person view: https://i.imgur.com/Tby6L0I.jpg
I didn't test it on other vehicles, but I tested it on unmodded local server. Result was the same.
My suggested solution: Remove the texture completely.
Servers tested: Jeff's Vehicle Warfare, Jeff's Nexuiz25 DM/TDM/CTF Server and a local server.