Thanks for the info OG, but with a 1.5 gearset, how are you managing 70.5mph at 4600rpms with a 25P...That would calculate to about 2.9% slip... :confused:

Your numbers make more sense if it were a 27P prop at about 10% slip(more reasonable)...I think it's a 27.

Daze - I think the current prop "25p" probably has been worked. Also the speeds are off of the speedo which is probably off by a few. I would really like to gain the extra 700 or 800 rpms and some more top end.

OG

Gotcha!!
A little bit of this and a little of that...adds up in the end. ;) :cool:
Thanks!!

We tested props on the 24 Outlaw last night. We are running with a 454. Right now we have a 23p-3 blade-high rpms, too high for me.
Let me see if I can remember all of the details of our testing.

First we tested a 24p-4blade-came out of the water very nice-handles real well-58.4mph-low rpm 4800

Second we tested a 25p-4blade-took FOREVER to get out of the water-55.2mph-5000rpm

Last was a 26p-4blade-lab finished-took a while to get out of the water-handles good but not as good as the 24-59.8mph-5000rpm.

I could be wrong on these. This was the first time I have ever tested props. Mike Gorden was the one running the show. I am sure he has the right details. GAWD I need to start writing this stuff down to remember.

We like the 24 because of the way it came out of the water and the way it handled and the low rpm BUT it is just NOT fast enough for my blood.

I am sure Mike will have more props for us to test soon.

Hi everyone, I running a 23p Mirage Plus lab finished by CHP. Runs 5100 rpms at about 61 mph although it has a lot of slipage at lower speeds unless I put the trim down.

Rick

Hi RHICKOFF,
Using your numbers, 23P prop, engine turning 5100 at 61mph, that yields 17.5% slip....That seems incredibly high...

Two things, either your tachometer is off and you're not turning 5100 or you're turning a smaller prop.

Any ideas??

Typically, turning a 23 pitch prop at 5100rpms should net upper 60's...

:confused:

Nick,

I have three props. The Mirage Plus (labbed) 23p at 5100 rpm and 61 mph. A Bravo I 23p at around 5100 rpm and 59 mph. And a Bravo I 21p at 5200 rpm and 57 mph. All are accurate to GPS. Any other idea's?

Rick

Hey OG, try a 22 or 24 Bravo 4 blade or a 21 or 23 Merc Rev 4. Both are 4 blades, see how you like them.

I was fastest with a 4 blade, It just improved the stern lift so much that is picked up speed and the attitdue improved trememdously. I wound up going with a labbed 23rev4.

A good lifting 4 blade is my suggestion to anyone running 500+ hp in a 24....

Good luck:)

Allan,

refresh my memory:crazy: :D How much HP are you running:confused:

OG:cool:

She's close...
 

Both the first 24p and the second 26p props were Bravo 4-blades.
We ran it up to 55.2 at around 5300RPM's and we turned around so we didn't wast time with that prop.
The third prop was a 26p Spinnelli 4-blad that I recently traded from another board member that has been lab finished, but not sure by whom. It is also a smaller diameter than the 26p Bravo prop.
My question would be, has anyone compared a 22p Hydromotive Q-IV to a 24p Bravo 4-blade? Does the 24 Outlaw like the stern lift of the Hydromotives?

By the way, Thanks to Ron & Carrie for letting me play with props and burn their gas.
Thanks guys, I love a good boat ride. :p