Originally Posted by trilerian
Hey guys, I have the x1 rtr. I changed the pipe for the jp-1, and wanted to know about an engine choice. This is my first nitro, but it seems to me that the force .28 that came with the car is pretty fast. Forgive my ignorance, but what I want to know is if a good .21 will have as much power and be as fast as the force .28, and if so what would be a good choice for a small track (100 x 60). With the .28 I have no problems lapping the electric 4x4's.
Yes, a good .21 will have as much power as your .28, in most cases, a good .21 will have alot more power. With the track size you listed, your .28 is more than enough power and you might even go slower with a .21 because they make their power at a higher rpm where your motor makes it at a lower rpm which is good for small tracks.