PerryB

EFFECTIVELY retards the timing because now the flame front has to cross the entire cylinder instead of two fronts that meet in the middle. The...

Why one mag? Shutting one off effectively retards the timing slightly but has no other effect on fuel demand. The optimal mixture will still be the...

Yes. Assuming air in the system is not the issue, precharging the system through the bleeder ports gives you a MUCH better pedal with the original...

I'd go 82-42.

Phooey. I was expecting a Merlin.

Whats the compression ratio? If it's truly a 150 w/ 7:1 compression, your numbers are in line. Those are a couple of highly pitched pitched props....

What could possibly go wrong.....? Besides the engine starting as you subsequently fall off.

Yes the PW radials are pretty easy prop. Low compression and plenty of flywheel. You also get lots of choices on prop position. Nine, over the...

There was one I saw a few times at Watts-Woodland in the early 80's. Had to be the same one.

That's going to be too much prop for a 150. For a standard/stock 150 hp O-320 an 82/42 is about all it wants to swing.