Alright I have been banging my head with this annoyance for a long time. So here is a fix for it. If I am not mistaken in 5.2 Epic introduced a feature where torque can be applied to each wheel. This can be used to bypass this throttle cut that chaos vehicle has. Below is a function using the “Set Drive Torque” feature. I made it so torque can be set by gear with first gear having the most torque, and top gear having the least torque.
The code snippet:
https://dev.epicgames.com/community/snippets/kojw/unreal-engine-chaos-vehicle-power-cut-bypass-function
Here is an alt link to the function:
Edit:
Remember to set the “Max wheelspin rotation” to a high value in your chaos tire settings. 25000 works for me.
Also set "External Torque Combine Method to additive.