Not really sure just yet,I can tell you it stays on plane at lower speed/RPM,also with my old props at 3300RPM I was doing 42mph and now I am doing 48mph,at WOT with my 32 4 blade Bravos the boat was inconsistent, one minute I was doing 76-77 then slow down or stop at a no wake and take off and I would now only be hitting 72WOT,with the new 5 blades I have taken the boat out 3 times and the temperature was hot 92-94 and the lake was flat no chop and boat was full of fuel and I was constantly hitting 73-74 which to me its a improvement,hopefully next time I go out the lake will have a 1-2 foot chop so this way I will have a better idea,but if I get a constant 75 out of that boat I will be happy,but I am happy now with the results,it will be interesting to see the result once I try the new signature 4 blade props I order for a back up set,who know maybe I can hit that B/S Fountain report of 79.5 LOL

What model / year Fountain do have?

04 35 EX 496 boat,I believe the boat is were it needs to be as far as top speed,I was just bored over the winter and thought I would play with the props,lol
Glad I did ,like the ride the 5 blades have to offer,
a lot of people on here as well as facebook claim they get 80-82 out of their 35 EX with same power,but I have asked for somebody to make me a believer and proof it to me with a video while they are doing 80-82 but so far nobody has,LOL!

Their prices seem to be very reasonable for a new prop. Waiting to hear the performance of the SL-4.

I just ordered it them, so I will update once I receive and try them out.

Any testing results yet?

the 5 blades have been working great,the 4 blades got shipped yesterday and I should have them by next Friday,bad news is I am leaving Thursday for 2 weeks so wont be able to test out the 4 blades till I come back,

Just send them to Michigan and I'll test them for you.
Your welcome

Wonder how they are vs. Brett's new 5 speed

Sorry to use the thread here, but...…..Cary look at these here compared to mine, in the same park.

My 5 blades are alleged to be one offs, Turbo - SQOXP 155030, BBlades labbed #1842 and #1843.
Basically a fat eared 15.50 X 30 5 blade with an average length tube and no flare that made several trips back for work. Last trip added the tip cup to the tip of the blades. You need to call Brett about his 4 and 5 Speeds maybe with the extended tube.

The Sage has spoken! Get Busy.