ORIGINAL: bluesilver
For the Buggys I have also found the RB C6BB engine to be the best suited for them.
I also found that if you change to the JP-3 pipe you get a bit more bottom end and also lets them rev a bit more freely up top.
Even better....
C6BB with JP-3 pipe and header from OS-T2050 (shorter than the JP header) + 30% Nitro and stock shimming. That's gravy righ there.
Ran that combo today and it's killer. It really woke up compared to the stock JP-3 which really limited the engine.
You don't need more bottom end with the C6BB. It's massive as it is.