Anyone with Hydromotive P5X results?
 

I'v been waiting to hear some random results from anyone that's ran these?

I'm looking for that extra 7mph at 3500 rpm... Is it possible??

Re: Anyone with Hydromotive P5X results?
 

Yes, it is possible to gain in your mid-range. Several OSO'ers have purchased and/or tried the P5-X. Hopefully they can chine in! If you want me to send you some test props the 27P and 29P are still available.

Julie

Re: Anyone with Hydromotive P5X results?
 

Thanks Julie, I've spoken to you several times about the new P5X's and I'm just waiting to hear results from the other guys before I purchase. I'm sure I'll end up with a pair.

I ran into a group of Eliminators from Sterling, Co. (the dealer) on the Missouri river the weekend before last and the guy with the new 28 Daytona with the Ilmor v-10's was running 5 blades. Didn't even think to ask how he liked them. Real smart, huh?? They were there for the shoot out, which was cancelled. Very nice people.

We're nearly at the end of our boating season and I'm thinking about adding some pro-chargers over the winter, then I will be ready to do some prop testing next spring. I'd still like to hear some results, specifically on the 28 daytona with twin 496 HO's.

Thanks again...

Re: Anyone with Hydromotive P5X results?
 

I am running 05 290 Velocity with a 27 pitch px5 on it.3500 rpm speeds went from 45 mph to 53.Top end numbers went from 82 to 83 at 5300 rpm.The motor is the 525 efi,also the other prop was a lab finish bravo 1-30 pitch.The prop just works better in every aspect.Planing acceleration,handling and efficiency..Julie was very helpfull in finding the right prop for my boat.

Thanks Julie...

Re: Anyone with Hydromotive P5X results?
 

We tried the 27's on a 28 daytona, no standoffs, high drive height, & they were no better that the labed bravo 30's he had.

I have 26 daytona with standoff box & very high X, with any 4 blade I could not run less than 30 mph or boat would come off plane. Tried the 27 boat would again run at low speed. Speeds at low RPM were not as good as when I had bravo I & regular drive that was 2" lower in water tho. Ran 27 but ran out of RPM on rev liminter of 5950. Speed of 101.7 I have now bought a 29, low speeds are better then the 27 but still not as good as the 30 was with the lower drive. Made some wot runs but blower belt was slipping bad & did not get any good runs in. Hopefully in 2 weeks will be able to make better comparison between the hydromotive 29 p5x & my lab bravo 30 & regular 32 bravo.

Re: Anyone with Hydromotive P5X results?
 

I have a 1998 382 Fastech Formula with HP 500 (carb) and no extension boxes. I currently have unlabbed 28" bravo one props, at 3500 rpm it runs 50 mph and a top speed of 75 at 5000 rpm. I would like to increase the mid range without hurting the top end. Are the P5X's the answer?

Re: Anyone with Hydromotive P5X results?
 

I'd like to hear the answer to this too,Smitty

Re: Anyone with Hydromotive P5X results?
 

Only way to find out is try. As I had stated above friend did not see any real increase. Call Julie @ throttle up & get on the list to try some, then you will know for sure. They have a test program. Way cheaper then buying.

Re: Anyone with Hydromotive P5X results?
 

Turbojack;

How high are the drives on the 28 daytona? I put Imco boxes on this past winter and think I need a set of 2" shortys now. I'm concerned about getting water supply with the shortys though. I'll get a good measurement, but drives are ~even to 1" below bottom of boat. It takes a good bit of positive trim to carry the bow ~4.5 on the bluewater. Before the boxes I blew the props pretty good coming on plane, now I have minimal blow. I turn 30 bravos IN @5600 with a best of 102 on GPS. Motors are 500EFI's with raised rev limiters, otherwise stock. I plan to try a set of QIV Hydomotives just to see what they'll do.

Re: Anyone with Hydromotive P5X results?
 

I have a possibly stupid question. If you are getting the props really hooked up, aren't you gonna bring more stress to the drive? I would think that will stress the drive more. :rolleyes:

Re: Anyone with Hydromotive P5X results?
 

There are many factors that affect the stress on the drive. We have to take into account in what kind of water the boat is used. We don't like to put 5 blade props on boats with standard prop shafts when used in rough water.

The positive side of a 5 blade is that there is less vibration which is less stressful on an outdrive. 5 blades generally get on plane better than 4 blades so there is less stress on the drive when getting on plane. 5 blades stay hooked up better in choppy water, the 4 blade tends to let loose before a 5 blade thus causing more stress than a 5 blade prop.

Overall I think the drives seem to last longer with a 5 or 6 blade prop than a 4 blade due to the above reasons, especially with bigger power.

Matt

Re: Anyone with Hydromotive P5X results?
 

jdnca1- Not real sure how high, I will ask him when I see him. I want to say he is above or even with the bottom. I know that he had to go & add thru hull water intakes since the shorty drives did not let him get any water once on plane at any speed above 30. He did before & now even more so of blowout coming on plane. He has NO problem getting the front up. Most times he has bow too high

Re: Anyone with Hydromotive P5X results?
 

I suspected there would be a water pick-up problem thats why I haven't tried a loaner set yet. Looks like I've found my first winter project!

Re: Anyone with Hydromotive P5X results?
 

I'm trying both the p-5's this weekend and the p-5x's during the week on a 28 Daytona 625 Hp motors with extension boxes and a high x-dimension. I will post results as I get them. I'm running 34 stock Bravo-1's right now, the best top speed I've seen is 114 (GPS) so we'll see.

Re: Anyone with Hydromotive P5X results?
 

Devin,
Let me know how the props work and also let me know before you run up to WI. I have a prop to send back with you. I am currently trying a P5X 27" on my cat. 112 MPH is the best I have seen with the 30 labbed Bravo and 115+ is my goal. I am trying the prop at current drive height and 2" higher. We shall see how it does and make a decision which way to go from there.
Craig

Re: Anyone with Hydromotive P5X results?
 

Wet, Unless you were a long way from the rev limiter with the 30, you will need to go at least to the 29

Re: Anyone with Hydromotive P5X results?
 

I agree with the shorty I will probably need to re-prop, but at least I can get a handle on if the boat will even plane off with the P5X and the shorty. Plus with my rev limit set at 6800 there is a good possibility If the boat planes OK the speed at 6500 - 6600 will be in that 115 area with the P5X. I have a lot of experimenting to do, but that is what it takes to get it right!! :D

Re: Anyone with Hydromotive P5X results?
 

I just started using P5X on my tripple fountain, These are replacing some Bravo 30's which were too much for my application. I am using 27" P5X. So far they are great. Now the 30's wer not right as I could only get about 4700 RPM out of them and about 76 MPH. The 27's now are turning about 5200. I have not banged the limiter yet but only have 2 runs on them. My 3000 rpm MPH was about 50 with the B1 30's and 48-49 with the P5's. Getting up on plane seemed quicker but I did not time it. I think they offer the best of both worlds, faster midrange better hole shot and similar top end. It would be interesting to put them up agianst 28 p bravos but I only had 30's.

Re: Anyone with Hydromotive P5X results?
 

Wet - what is your X. My propshaft is 1/2 above the lowest part of the outside sponsons. I do not have any problems at all planing with the p5x. When my drive was 2" lower with labed 30 I had little blowout after boat brokeover, & it was same with the higher drive height.

Re: Anyone with Hydromotive P5X results?
 

this just in... 29 p5x CUSTOM labbed by tom at hydromotive

2001 35 playboy cig... 4000 rpm cruise 63.7 mph top end 84 mph
a labbed 30 bravo 1 was 59 mph and 81 mph the playboy is heavy though and i think the 5 get the nose up more which is needed,
on shorter lighter boats the gain may not be as great
i tried no labbed 30 4blades from tom and saw 83.1 if ilabbed thoughs i think i would have been at 85 but lost some cruise speed

Re: Anyone with Hydromotive P5X results?
 

In testing today, they do get on plane quicker and smoother for sure. I hit 82 today with 1/2 tank and 6 people on board. (stock HP500EFI's). I am very hapy so far.

Re: Anyone with Hydromotive P5X results?
 

This prop has completely changed the handling of our particular boat.
Go to my write up in this post for details..
Dave :D

http://www.offshoreonly.com/forums/s...ad.php?t=83559

Re: Anyone with Hydromotive P5X results?
 

I'm sure this is written in here somewhere, but what is the general rule of thumb size wise when going from a 4-blade Bravo One prop to a PX5 prop? Do you normaly pitch one prop size down when using a 5-bladed prop?

Re: Anyone with Hydromotive P5X results?
 

I think that is what they told me. I think I was also told that the bravo 30 should be = to the 27 p5x. My 30 bravo 1 was labed by Houston & I am now trying the 29 p5x since I was on rev limiter with the 27 p5x. Hopefully this weekend will be able to do some good testing between the labed 30 bravo, 32 bravo, & 29 p5x.

Re: Anyone with Hydromotive P5X results?
 

I tested 25 & 27 pitch P5X's on my 28 Nordic Midcabin. The 27 turned the exact RPM and speed at WOT as a labbed 28 Bravo 1, but had much better low end and cruise numbers. The 25 turns the same RPM/Speed as a stock 26 Bravo 1 prop at WOT, but the low end and cruise is again much better. Where you really notice a difference is when the boat has a lot of weight in the bow, the P5X will stay hooked up great. The Bravo props would slip and the boat wouldn't stay on plane below 40 MPH. That's my experience. This boat loves 'em.

Re: Anyone with Hydromotive P5X results?
 

My propshaft is about 2-1/4" below my sponsons and it planes out fine with a 30 labbed Bravo 1.

Re: Anyone with Hydromotive P5X results?
 

:D Craig
I dont have any 5 blades,but I do have a labbed 4 blade that is a 32 twisted to a 33 that Merc did for me, I really think that as light as your boat is and with the hp you have, I think that you could turn it and maybe pick up the extra mph that you are looking for if you can get it to roll over. Anyway, you are more than welcome to try it.. :D

Les
219 548 9500-Home nights 219 916 2120-Cell days

Re: Anyone with Hydromotive P5X results?
 

Water condition were 1-2 chop air temp 76 deg. The P-5's gave me a lot a stern lift (too much), made the boat real squirrelly at speed. The P-5X felt a lot like the bravo with more response and control. Both the 5 bladed props handle rough water much better and came up on plain easier but the Bravo still had the best top end as you can see. I was into the rev limiter hard with the P-5X's so Im sure if I went up to 33's or 34's when there available I'll get the speed of the Bravo. I was into the limiter with the Bravo just not a hard.

Rev limiter set at 5400 rpm's

P-5 32p labbed...............P-5X 32p stock.................Bravo 34p stock
3200 rpm 63 mph............3200 rpm 63 mph...............3200 rpm 60 mph
5200 rpm 110 mph...........5400 rpm 112 mph.............5400 rpm 115 mph

Re: Anyone with Hydromotive P5X results?
 

I'm curious why there was such an rpm difference between the P5 and P5x. Especially with all the stern-lift you were getting from them. The slip numbers are surprisingly low considering the stern-lift of the p5's. I am also impressed with the low slip number for the Bravo 1. Of course if it was lab finished it could be a different story.

How did the Bravo 1 get on plane compared to the P5x. I would have to agree that if we had a 33 or 34 P5x we would see increased speed. Each inch of pitch is about 3 mph so if you were able to spin a 33 p5x at the rev limiter I would expect 115. If you could turn the 34 P5x then maybe a little more than the Bravo 1.

Assuming that the 33 P5x had the same top end as the Bravo 1, are all the benefits of the 5 blade worth the money? Also keep in mind your cruise speed would increase with a 33 or 34 P5x. About 2 mph or so.

Re: Anyone with Hydromotive P5X results?
 

???If the P5s generate a lot more stern lift than the B1s, where do the Merc Maximus 5s fall in this picture? More or less stern lift than a B1 of comparable pitch?

Re: Anyone with Hydromotive P5X results?
 

It looks like my setup is very similar to Cat-n-Around. Same hp, high X, boxes etc. My performance with the stock 34 Bravos are about the same. I tried a pair of P5s and they provided too much stern lift.

The P5s ran great in ruff water and at cruise, but the stern lift caused some bouncing in the 75 mph range. I have a friend with about the same boat but more hp and lower X. He loves the P5s except for the top end speed, but how often are you running there?

Thanks for the test results Cat-n-Around.

Re: Anyone with Hydromotive P5X results?
 

I agree the p5's did run better in rough water. I too don't understand why the rpm's were lower, the prop's were ran back to back. With the p5x's I should be able to spin at least 33's, I was into the rev limiter pretty hard. They are definitely easier to get on plain and stay on plain at a much slower speed. If I could the same top end or better with the p5x they would be worth the money. But the Bravo's performed very good just took a little longer to get there.