don't do that, the engine has to have a load on it when breaking it in, which is why they say to run it on the street, there won't be much lost control with an engine on break in, you should be running really rich, and the car won't pick up speed....also, a tip, we've gone over this a million times, so please search the forum about it...check out www.rbproducts.com and click on forum to see more ways on break in.