its ok mensa is allways at my house thanks alot lol if yo know what that menas ... no didnt think so
As a matter of fact, I do know what Mensa not only means, but the requirements on being a member of Mensa, the correct grammar to use when using the word "Mensa", "always", "a lot", "you" and "didn't", not to mention your double misspelling of the word "Mensa" and "means" at the same time! If you're going to flame someone for misspelling a word, it helps if you can at least spell correctly (not to mention the spell checking feature this forum has.)
Now, Dan14, so as to not derail your question outright, any rig can go just about as fast as you want it to if you are willing to invest the time and money into making it as fast as you want. Factors that affect speed include the size of the engine, the CB and spur tooth counts, the weight of the rig itself, the size and compound of the tires and variables similar to those. Think of it in terms of a regular 1:1 automobile. I've seen folks take a VW Beetle (old style) and drop a 350 smallblock with a different transmission and those things flat fly. It's all in what you want to make of it.
That being said, getting a rig that runs so fast it's near impossible to control becomes frustrating. I have a little RC18T that I dropped a Mamba 8000 in and I tend to regret that decision every time I run it. It's wicked fast, so fast that it's a bear to control and tends to end up on it's lid more often than not.
There is no set answer to your question, but stock, right out of the box with standard gearing and a mid-range .21, I'd say in the 35-45 MPH range should be expected for top speed.
Hope that helps!