Well i just looked at the bundle of different props i already had and I think they are way off. Here is what I have, all APC
9X7.5 (racing)
9X8.5 (racing prop)
8.75X7.5 (pylon prop)
8X8 (looks to be a regular prop, no bag & label with it)
I can see a difference in the design between the racing and pylon prop. The racing ones are curved and seem a like they have more meat on them. The pylon is much skinnier and is more pointed. As for the 8x8 it just looks like a regular prop, it may be a racing but kinda hard to tell since its so small.
Seems the props I have are nothing what people been talking about, think I'm way off.....oops....
Also I was wondering about wooden props. What do you guys like better? what seems to work well? I know I did use a 9X7 pylon prop before with my OS .46 FX and it had an instant rev compared to APC. But with that engine I think its apples and oranges.