I have a hot bodies dirt demon with the stock Powerhouse .26 on it.

The problem is that when it starts it sounds like it's at full throutle when it's at idle but it still drives fine.

With this problem i have been clocked at 46MpH when it comes to idle after driving for a few minutes it sounds like a normal engine but after a few seconds is roars again. I have had the motor for about 3-6 months and it still does it from when i got it. I race my trucks so i have had pro/expert drivers look at it. I think it has something to do with the carb. I'm thinking of getting this motor for it
( http://www.ofna.com/eng-picco-28.html ) Ofna .28T Factory Team w/Turbo Plug. Is this motor any good it sais it's taking the 27's place?

Thanks in advance
Joe