New 4 blade prop

ACME 540Luchog
Ok, I am thinking that is the best prop too.. I have listend to alot of yalls opions and think its the best prop for my boat.. Only three more months and I am getting my boat ready for spring..lol to sad for you guys up north..

Ok SNobessed,
I will call Delta props, but I dont use my boat for tubing, only a little.. Maybe twice.. Mostly skiing and when my friends cant go to the lake I go by myself.. Merry Christmas to you as well.. Thanks..

ok sounds good.. I will do a little more research on some props. I just want to make sure I put the right one on, and nothing changes except hole shot. Yall have talked alot about different props but if there is a another 3 blade prop out there that performs better than what I got then I will stay with the 3 blade. If not I most likley will go with the 540. I will goggle props and see whats going on..

I've got this really cool 2 blade red composite prop, just put out by the Acmme company. It's 12x12 and a brass hook for attaching the rubber propulsion extension bands... I was quoted top speed of 49mph for the first 40 yards when wound correctly.. Any advise on going with this style prop/system Hollywood???

Moj'

skicat2001 wrote: I use my boat for tubing

Maybe you should go with Hollywood's prop suggestion.

Try a Federal or Michigan Wheel, they do make a 13x13 and a 13x12 to fit your boat. It would be an awesome upgrade!

Lee,
Considering what you want to use the boat for and the WOT, my vote is the 540.
Other opinions?

Ok guys, I got a 3 blade 13 x 13 prop. So what should I get. 540 or 542? Or should I stay with the three blade maybe a differnt one. What you think?

skicat2001 wrote: 8122, I sure will.. I am going up there this next weekend to check. Please look for my reply, I would really like some more advice after I get the specs. You guys know your props.. Thanks

you got all the advice you are looking for 10 ***************ing times over already

Lee,
Confirm what prop you have on the boat now. Take a look and see if it is the 13x13.

For clarification, I do recommend the three blade cnc props for almost all DD boats and almost all uses they are the best all around performer, just not sure we can throw away all the four blades just yet.

Cavitation is a pretty specific and often violent event that usually leaves behind some evidence, more common to simply increase slippage. Now whether the slippage increases simply because it now takes an exponentially increasing amount of power to get moving faster or because the blades are flexing and becoming less efficient, or a combination of both I dont know.

Skicat,
   Sorry to include all this confusion on your post, its all way past what you need for your boat. The following applies to you,

The prop determines how many rpm your engine can achieve. A larger pitch prop, or sometimes the same pitch prop with additional blades is harder to turn and will keep your engine to a lower RPM (rotations per minute) at WOT (wide open throttle or full speed). A smaller pitch prop is easier to turn will let your engine turn more RPM and typically has a better whole shot. Your boat if stock should run between 4400 and 4600 rpm at WOT with minimal load. If it runs significantly lower than that you need less pitch, if it runs significantly higher you need more pitch. In general the 542 will run more rpm and give you better holeshot (good for heavily loaded boats used mostly for boarding, or boats where the engine is getting a little tired), and the 540 will run lower rpm and give you better top speed. For your boat most (but not all) have found that both are better in every way than the stock 13 x 13 three blade props that were standard on this boat, and both are better in every way than any of the four blades available.

No, I sure dont know my WOT RPM. Please explain.. Like I said, I am glad to talk to some guys that are very helpful on props,rpms and etc. Know I can learn more and really get my boat hummming.. So what is a 3 blade 542?

Joe - Is there a point (in RPM) where a prop starts to cavitate?

JoeinNY wrote: All I know is I got whooped by two different 4 blade wearing boats up at Lake George...

I think if you were to have lined up with the 409 out of the hole, you wouldnt have considered it such a whooping... guarantee you would have put 1-2 boatlengths on it. What was the other boat?

You and I both know that matching the size of the prop (mainly pitch) to the power curve of the motor is critical. It just so happens that the 4-blades available for the 1.23 are a bit steeper, which lend themselves well to high-hp combos.

So tell me Joe- if there was a suitable 3-blade for your boat (~13x16.25 Acme), dont you think that would be the hot ticket?

TRBenj wrote: As to why CC continues to offer 4-blades as original equipment on the DD's is anyones guess. Even Acme admits that the 3-blades offer better performance.

What does "DD" mean, I'm a big fan of double D's, but I'm assuming it means something else in this context?!?!?