Anyone here have experience using tire warmers? Our club uses WKA rules and have confirmed that there is no rule not allowing them. We do a GWC qualifying and about half our time our outlap is not even half a lap to get temp in tires. Anyone with experience know how long after taking blankets off in normal 60 degree morning weather, if the remaining heat would still be effective.
I could have them on plugged in at pits, keep on then remove at grid but could be sitting for 5-10 min before released.