Raypanic

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.

Nordicflame

iTrader: (4)

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

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

KAAMA

iTrader: (1)

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?

Turbojack

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.

bobl

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.

WETTE VETTE

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

eliminator219

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..

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

Cat-n-Around

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

throttleup

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.

cdscarab

???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?