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-   -   New props- 2005--42 Ex/525 efi's (https://www.offshoreonly.com/forums/fountain/176153-new-props-2005-42-ex-525-efis.html)

gerritm 12-27-2007 08:08 AM

New props- 2005--42 Ex/525 efi's
 
I got a new set of labbed 32P Bravo 1 props. I got a chance to run them last week. My stock props were 32P Bravo 1. Here is the before and after.
Stock 32P -- WOT 81mph @ 5000RPM's
Labbed 32P -- WOT 79.5 @ 5200RPM

Similar conditions, temp around 70 --1/2 load of fuel -- 2 people -- about 1 foot waves.

I picked up a couple of hundred RPM's but struggled to get the last few MPH @ top speed. Boat ran well, very similar in planing and cruise speeds and RPM's. Any ideas?

tblrklakemo 12-27-2007 09:52 AM


Originally Posted by gerritm (Post 2384345)
I got a new set of labbed 32P Bravo 1 props. I got a chance to run them last week. My stock props were 32P Bravo 1. Here is the before and after.
Stock 32P -- WOT 81mph @ 5000RPM's
Labbed 32P -- WOT 79.5 @ 5200RPM

Similar conditions, temp around 70 --1/2 load of fuel -- 2 people -- about 1 foot waves.

I picked up a couple of hundred RPM's but struggled to get the last few MPH @ top speed. Boat ran well, very similar in planing and cruise speeds and RPM's. Any ideas?

not labbed correctly for your boat?

TxHawk 12-27-2007 11:05 AM

I realize that salt water will be different but, I have seen the 42's with 525's do very well with a 1" spacer and 30 P5X's.
TxFountain here on OSO was getting 83.7 in the summer heat on Texoma. His boat had AC and Gen.

fastoys 12-27-2007 12:25 PM

I like the 5 blade Maximus labbed. Boat is better all around. Talk 2 Monstaa.

Single With Twins 12-27-2007 03:55 PM

not apples to apples but on my 42 with 600 Innovations I went from 4 blade 31 bravo 1's to 5 blade 29 Hydros and it works much better all around for me.

I am sure my selection isn't the best on the market but 5 blade props might be where to look.

Good luck;

Jay

gerritm 12-27-2007 04:32 PM


Originally Posted by Single With Twins (Post 2384798)
not apples to apples but on my 42 with 600 Innovations I went from 4 blade 31 bravo 1's to 5 blade 29 Hydros and it works much better all around for me.

I am sure my selection isn't the best on the market but 5 blade props might be where to look.

Good luck;

Jay

I appreciate the info. I got the props for free and wanted to see if there was an improvement. I was curious what the results would be. If they worked out great. I still think the 5 blade is the way to go, but these were the right price. Might just have to sell or trade them.

Fountainclimber 12-30-2007 12:02 PM

I've have a pair of 28" Maximus' with a test run only. XR hubs. Plastic plugs are missing. Very cheap.

F

gerritm 01-01-2008 09:04 AM

I think the 28's would be a little light for pitch. I think I would need around a 30P in a 5blade. I did take the boat out yesterday for a New Year's Eve run and with a light load of fuel, and 2 people in the boat we did get it up to 82mph with a little coaxing. Stayed around 5200 rpm.

Fountainclimber 01-01-2008 08:37 PM

The stock 32 Bravos turn 5400. The 28 Maximus run about 5200 on a 2004 38.

F

HiPerf2000 01-01-2008 08:50 PM

I have a pair of XR shaft 32p hydros for sale if you wanted to switch to hydromotives.


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