No i dont race, but i consider my bashing to be pretty rough. My engine has 2 gallons through it now, i hope it will go for at least 2 more. I was going to get the D21B, but my brother bought the T, and it was way better than my force 8 port, so i got me a T also. I just figured for less than $200 for a modified how could i go wrong, plus i had some turbo plugs left over from my orion .28 wasp that was toast after about 5 tanks, the dang bushing in the conecting rod disintegrate, and ruined the whole thing.