too much for my O27 curves....sometimes it takes a gentle hand starting the train out with the Prewar cars.
Sometime when your sitting watching a movie for a few hours, grab a handful of tin wheels and axles, a rag and a bottle of Brasso and go to town. Do that to all those axles and wheels then get em all cleaned off, oil em up and you can pull what ever you want.
Hey, they make or did make 042 and 054 curves in 027 track if you can find some. There is also the Marx 034 which I bet you have some of. Just sayin, you might could modify one of your loops with some broader curves if needed...
Here you go, complete circle of 054 (027 size) Lionel track. You could keep the 027 inner, change to 042 middle and 054 on the outer loop. I think it would work and wouldn't take any more space to do.
https://www.ebay.com/itm/LIONE...c:g:VSgAAOSwHcpaokNW