Charging at the track

Originally Posted by othello

Car batteries are built for delivering short high Amp bursts (ie starting your motor) and beeing recharged constantly. Applying a constant load (recharging your RC batteries) for a rather long period of time and maybe depleting your battery over half its capacity will degrade its capacity and cycle life in a short amount of time. Running your engine while recharging is the better option (when you don't want to degrade your cars battery).

As _paralyzed_ has already mentioned
-> A marine or RV battery is your best bet

should i replace my car battery with a marine or RV battery? and then charge my lipos off of that while it is idling , is that better? my car has no overheat issues, it warms up and than it stays at perfect operating temp. but this carbon build up thing, should i be concerned?

thank you for your advice and suggestions