An Abmods .12 racing engine or Murnan modified .12 will be your best bet with a 19t(first gear) dynotech pinion(25t second gear)....You'll leave the new cars in the dust...

I was just thinking about this, and I wonder if it does work, but for a completely different reason than it's supposed to.

My recent adventure with increasing the exhaust timing on a crappy engine has given me reason to consider, what if the RB Innovations "supercharger" generates just enough extra pressure in the intake to have a similar effect as mildly increasing the intake and exhaust timing? As a general rule, our little nitro engines don't get anywhere near their metallurgical limits (except for the occasional defective part, anyway), because nobody wants to get a reputation for making engines that explode during the A-main. While our little nitro engines don't have RPM limiters like full-size engines have, they are still effectively RPM-limited by their ability to suck in fresh air and fuel and push out exhaust. Since our little engines are essentially suffocating at high RPM, slightly better intake airflow would produce slightly higher pressure in the bottom of the crankcase at high RPM, enabling the transfer ports to scavenge the combustion chamber slightly more thoroughly. (I'm repeating the word "slightly" over and over on purpose.) So, even though there's no way the "supercharger" could actually pack more air and fuel into the combustion chamber, and even though any extra fuel that made it into the engine would be wasted straight out the exhaust, the "supercharger" might make a crappy engine run a little less crappy.

If it works the way I suggested, it would still be a ham-fisted alternative to actually learning how a valveless 2-stroke engine works and making adjustments correctly, but it would at least be more than a placebo effect.

Calculate how much liter air is going through the engine per minute at full speed, thats about 40 liter air per minute.

The turbo is a closed system so all air must be provide by the air pump, is that little thing capable of blowing more than 40 liter per minute?

At 35,000rpm it blows enough air to make the hair in your nose wiggle a little bit. I have one that a friend gave to me. It’s poorly manufactured, worse tolerances, and the main shaft is only supported by a single ball bearing. It’s a quack hop-up.

It's not a closed system. You are thinking of a positive-displacement supercharger like a Roots supercharger. The RB "supercharger" is just a belt-driven fan, similar to a centrifugal supercharger except manufactured to much looser tolerances. Air can get around the fan.

Again, I'm not saying the RB "supercharger" is actually pressurizing the engine. There is no way it could do that. But it might reduce the vacuum in the intake a little bit at high RPM, and a slight improvement in airflow would translate to a small but noticeable increase in power, especially in an engine with mild timing and a carburetor that is too narrow. The TRX 3.3 does indeed have a carburetor that is too narrow. People have been fitting TRX 3.3 engines with wider carburetors from the Losi 3.4 for years.

It also weighs too much for a 200mm sedan to get almost zero performance gains versus a Modified .12....