Keen to hear what your numbers are full throttle and what boat and engine combo you have. What pitch etc now.
The vengeance can certainly be improved on for sure, as you say. I can’t think of an occasion when the vengeance has actually performed better than the standard ally black max the same pitch, on boats I know of.
All I’d say is that I’ve been blown away with the enertia for out and out top end on my boats. But I’ll admit that it’s not as perfect as I thought all round. The tempest plus taught me this last year. The more I use my tempest prop, the more I admire it. It’s just so good mid range and for efficiency mid range too. And compared to anything else but the enertia, it’s incredible too end too.
The rev 4 from what I know of them is an incredible thing too. But only really on boats that are heavy and have huge power to swing them. A 4 blade will always be a compromise on performance compared to a 3 blade. Just on physics alone. But the Rev 4 and bravo 4 blades do a serious job on performance for such a compromise. If you don’t have a big heavy hull with big power and the need for a 4 blade...stick to a 3 blade, I’d say. One thing to think about is that there is certainly a difference to the way the tempest behaves compared to your vengeance...pitch for pitch. The tempest and to a lesser extent, the enertia...will almost behave like an extra inch in pitch, in my experience. Same goes compared to a laser 2 or black max. To explain a little further. Without looking up exact details...your average black max, vengeance or laser 2 19” prop will be around 13.75” to max 14” diameter by 19” pitch. The 19” tempest will I have will be about 14.25” or maybe even more. Can’t quite remember now. The Rev 4 19” I assume will be the same or larger. Big blades and lots of lift from them. This means they usually have a lower rpm cruising than the usual 19” prop. But to confuse thing further...that can often be cancelled out at the top end...given the hull lift they can have...meaning that they can sometimes allow equal or more rpm at full throttle...with more speed too, of course.
The enertia again is a funny one. They are made of the X7 alloy metal. I’d guess that they are around a 1/4 to a 1/3 the weight of a same pitch vengeance or laser 2 perhaps. Meaning they can be easier to spin than usual. Lots to think about. But for sure. You’ll need to try a few out. Said it a few times by now...but I’ve been known a tempest of 2” less pitch to show less rpm than a 4 blade ally prop...along with an increase in speed by around 5/6 mph at the top end.
