I just did a forum search and found 19 threads that mention a 9V battery. This one:
http://www.tinyrc.com/forums/showthr...8122&highlight
shows a post where 12 volts was pumped through a motor. The poster claims that the motors could take it and failed due to melting the endcap due to friction. The internal contacts were unharmed according to his observations. So, it looks like the motors may take 9 volts, at least for a short time. So, I retract my declarative statement on that. However, there is no post claiming the PCB can handle that voltage level. The post sited here even says that it won't take it. Though he did motor tests only using kit racer frames. So, I don't see any threads on this site supporting the PCB taking 9VDC. I'm not willing to sacrafice a perfectly good micro to prove it to myself, so I guess I'm stuck being skeptical. You could do this to a mosfet modded car though. They can handle the voltage. Well some fets can. This gives me concern for a video proving anything as well. A mosfetted car could do it (assuming the DC/DC converter is out of spec enough to take it). A car with a paper battery made from scans of a real 9V constructed in Photoshop would make a very convincing video as well. I suppose the only way to really prove it to oneself is to bite the bullet and hook one to a functioning stock car. I'm just not sure I'm willing to pay 20.00 for the proof
.