Default is no punch control - this is from Castle's Driver's ED manual

"4. Punch / Traction Control
This setting controls how fast the throttle position within the ESC can be changed over time. This smoothes high power starts and limits punch somewhat. As explained previously, acceleration is a matter of battery capability, but you may not want 100% of what the battery can deliver in every situation.

This setting is crucial to drag racing as it can be used as a “traction control” to match traction conditions. The lower the setting, the less throttle change limiting there is. For pure burnout and wheelie action, use a very low setting or the disabled setting. For softer acceleration or for a lowgrip surface, raise it up to a higher setting.

Don’t be afraid to use these settings! It may be fun to watch your car do back flips, but sooner or later you are going to want to be able to drive it under some semblance of control. This is T H E setting to put you back into control."

Punch is backwards from what you might think it would be....