Tried Q5 Hydromotives on 382
 

Compared to labbed B1's: Stock Q5's, with 3 inches less pitch, speed down 1, rpm down 200. Slip cut in half, from 21% to 11%. All readings are gps and digital tacks. Tests with same weight, same place, same day, back to back. This ones for Troutly.

Your welcome, thank you, John B

PS, labbing should make Q5's better than B1 labs.

Hey John, are you that dude with the sloop that the Beach Boys sing about?:p

Have not heard of anyone who tried the Hydromotives, after talking to Hydromotive, who was not pleased with the outcome. What advantage are you personally seeing with spinning them in, and does it affect the "docking" manuvering of the boat?

Props in both cases were spinning out. I have to back into a boathouse, and spinning out would cause too much hull damage, because the boat will crab sideways badly with one in reverse.

The best part for us is the higher speeds at the same rpm in the lower speed range:

Minimum planning speed (light load) B1Lab= 22mph with full down tabs @ 2200. Q5 stock 18mph @ 18mph.

Tabs & trim level @ 3000rpm; Q5 = 43, B1 = 36
This works much better with the HP sound choice which opens at 3000rpm and won't close above 2700rpm.

John B

Mr.Troutly,
The 29's on loan for test or are they for sale.I'm currently able to turn 5300 + with 28 lab b1S and seems for me the 29's could be just what I need.29 Hydros do not work for me.

Troutly, Your running weight is probably over 12200lbs. Try this formula http://go-fast.com/boat_speed_predictions.htm . Your shaft horsepower is maybe 920 or less (with those ****ty mufflers), weight 12100+-, with a factor of maybe 260 (maybe lower with the extra 1/2" spacer). This gets you to maybe 71 mph.
Now pop in 11000 lbs and you should hit 74 +-.

Did you gain any speed with the 29's?

Troutly, Tom at Hydromotive, an old friend and the owner, told me Wednesday that Formula has recently bought a bunch of Q 5's from him. The Q5's are so much better than the B1's on the 382, I wouldn't be surprised if they aren't going to use them on the new 382's. Robert should check this out for you, they may swap a pair for your 30's. You would probably want 25's or 26's, call Tom for recommendations, he hit mine right on the money.
John

Troutly, BTW the B1's are 31 pitch and the Q5's are 28's. 82 @ 5350 = B1 & 81 @ 5150 = Q5.

I have been a little out of pocket with a minor health problem. Whatever you guys need can be billed to me and we can work out the details later. Hope to be back at work in a few days. I'm sure Darryl Johnson will take care of you in my absence. Sorry for the inconvenience. Robert

Magic,

Sorry to hear you are under the weather and wish you a speedy recovery.

John B

Robert, get well soon, the board needs you :)

Robert is basically OK,just some stress.Happens a lot,he gets burned out and has to regroup. He is going to doctor Wed AM,thanks for your thoughts. Karen

Troutly,

I hate to butt in again, but I humbly suggest that you consider testing w/o the spacers before you settle in on the props. As long are you are not running into cavitation problems - which I think you already said you are not, sorting this out should be the first step.

That alone, I think you will find a 100-200 rpm increase and that extra mph to two.

The worse scenario would be is settling in with the props, having them labbed, then realizing you don't need the spacers, and having to bump the props again. It's just a waste of time and money.

At the very least, do the spacer testing before the labbing.

John B., does your 382 have the spacers too?

Good luck.

Just what is involved with removing the spacers? I have never seen one. Is it simply a matter of unbolting, removing the spacer and reassembly? Or do you need to change internal parts too?

I too would think that if it is an easy change that you would first try the 5 blades with the spacers removed. The 5 blades may be fine at the higher x, specially if the original props were too high a pitch.

Troutly,

Once you try the 5 blades you will want them! They are the ticket for heavy boats. You can also run a higher x dimension, with less slip, and thus more speed!

Our x dimensions' could be the same. Mine has Stellings boxes which are 14 inch set backs, while your ITS's are 9 inches. Your's is borderline's with 4 blades, therefore, I think, Formula added the spacers. If your drives were down another 2 inches you probably would have way less slip, and wouldn't be able to pull the 30" B1's past 4700.

MrMagloo, Mine has no spacers.

Padraig, When you add a spacer you need a longer coupling for the vertical shaft, which you swap for a stock one if you pull it out. You also need longer or shorter studs etc. depending on which way you are going.

formulafastech,
Thanks for asking that question. I am a little confused myself. I think it might have something to due with the amount of slip. if 29's slipped bad, they may have acted like 26's?

Think of these props like a torque converter in a car, the bigger the diameter and the more fins the less slip.
Very simple right!

Sweet :)

Troutly Nice!
 

Please let me know how they work I'm anxious to hear! I will get a set right away based upon your results!

Do you need any Leak proof trim pump caps? Fancy ones?

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