Anybody ever swapped out a heavy( stock) rotating assy for lighter aftermarket?

mderoy340 said
Auto Racing Weather « Air Density Online
You can get historical data for a track here.

1st problem is I don't see my local "Rockport Int'l Raceway" on the list of tracks, 2nd problem is the history function on that page only goes back to Feb 2016. Engine #1 run was 8/18/2014, Engine #2 run was 7/30/16.

Grant