Hi,
I think your right. All the boosters say 4.2v max
I did fit a power cap on my RX for a race, but no change.
So I think I need a power cap on the ESC (hobbywing 60A).
I still don't know anything about those either !!
Any pointers on what ones to buy for the ESC?
I can repeat buy some caps for the RX on Ebay, as I got some of those for my 10's
The problem on my car is quite bad, when the RC shuts down, it normally twats me into another car or track side.
Thanks.