Wiz
Forgot about Blackies' C150 TD. Yes, flew it with the 150 Lyco, but declined after he went 180HP. Once saw a C150 tailplane that nearly flapped unassisted after a lot of mustering with 150HP pulling it around in rough air. I don't think Clyde C intended them to have so much HP.
But, after saying all that, I'm admitting hypocrisy, as I fitted a Superior IO-360 to my RV-9A...when VANS says 160HP is the limit. It develops 190HP.
happy days,