I was wondering if it is normal for the carb. not to open all of the way when new?
No it should open all the way. There must be something blocking it or your linkage is not set up correctly
"I like rc cars"....."WHAT? YOU'RE KIDDING!"
Either that or the carb is not adjusted properly. You can loosen the pinch bolt and spin it just a little.
The Super Derecho
I adjusted it when I bought it. I was just curious if it was normal.
When I got my Slayer, it only opened half way. Go figure.
Mine did the same, but was fixed by resetting the transmitter. In my case anyway :-)