For 21.5's on larger outdoor tracks try starting at 46* on a motolyser and a 3.4 to 3.5 FDR.
I have feedback from some guys who have gone to a 3.1 to 3.3 FDR at 48*, but start off safe
Large outdoor track 3.39fdr at 51degrees it's a rocket with a r1 fan comes off the track about 138degrees that's in the Florida heat. Timing at 51 on a motolyzer
