Okay this is only an idea. What if you do a two cell mod with a booster car. Like connect the 2nd battery to the booster button. So when you press the booster the 2nd cell opens up. Tell me what you think.
It seems like it would work, but I couldn't begin to give you advise on the proper setup that would be involved to make this mod work without burning up one of the batteries or the motor.
If you figure it out...please post it for all to see.
Okay but I can only get a hold of the microsizer(unboosted) cars sorry. But if someone can make it possible to work it would be really cool. You can maybe do a tri cell. One cell powering the car (unboosted) and when you hit the boost the two other cells would be unlocked. This would definity pop a welly while movingand you hit the boost. Just a thought!