Originally posted by jfc_tech
Yea i agree too that its the driver and that os tr is a good engine.
previously, no one at our place wanna use the OS TR other than this new guy from out of town. he end up consistent in our A-main top 5.Now our LHS got a problem...out of stock. 
Someone asked why one would use a restrictor? The answer is simple and this proves it. The OS TR may not be as powerful as some of the other motors, but You can end up being more consistant as you have the RIGHT power. More consistant often means you will do vry well in the race if not win, (If you drive well obviously, as the driver is what wins, not the car) as you will not over power the car through corners and end up spinning in many places.