Prop selection help

[AndrewC]

Calling on those that have prop experience.

I have been through this with my last crossover boat and am about to look at a new prop for my current boat. I hate prop shopping as I feel so out of my depth on this stuff.

I currently run a acme 537 which is 13.5" DIA x 16" Pitch. I want to stay with the Acme brand and My boat is a 07 220SAN.

Reason for upgrade is we are running extra sacs for surfing now and if we want to relocate our surf spot, we can't get on the plane to do so.

Here's the next issue. My current top end is 40mph and I don't want to lose any off this as we would not be able to foot.

I have herd that there are "tractor' props out there that offer better hole shot with out sacrificing top end. Is this true or am I asking too much?

One option that I was considering is a Acme 1579 (13.5" Dia x 14.25" pitch) but not sure if my top end would suffer. Pretty sure that the Acme 1235 (14.5" Dia x 14.25" Pitch) would kill my top end too much.

I have been on wakeprops.com but looking for some real life experience input/knowledge.

Cheers

[nyryan2001]

Well the 14" pitch is what allows you to go 40+.

You are limited in that you are trying to increase hole shot while loaded bu not loose your 40+. Normally you drop pitch.... And take "smaller steps" to carry heavier loads. But dropping pitch will reduce your wide open speed.

about the only thing you can do is increase diameter, keeping pitch the same... Till you max the tq your engine is able to produce, swinging the larger prop... Till you can no longer hit your 5500rpm wide open.

the 1235 would bet suggestion, if your engine can swing it up to 5500... But there isn't magical answer. Generally you gotta give something to get something in props.

more specifics would help.

EXACTly what is your top speed now and RPMs? What speed is your absolute requirement? 41? 42?

[scottb7]

Yep on the "gotta give to get". I understand in summary the trade off is power or speed.

I am re-propping my 2008 210 due to wanting to take less time to get on plane. Per below link I am going from one extreme to the other from 645 to 1433. I have a couple people that ski at 36 mph a couple times a year. If I am ok with rpm's at that speed then fine. If I don't like engine speed at 36 mph on new prop I may tell them to wakeboard, or buy their own boat. I gotta do what I gotta do to optimize the experience for the 90%.



http://www.wakeprops.com/wakeboard-b...oat-propellers

[1955 classic]

Hi Andrew

unfortunately you have to make a trade off for one or the other. I have done many prop changes over the years and once you get into the cnc acme props etc, they do what they are designed to do.
that being said, a tractor (surf prop) cant do the top speed of a Ferrari(footing) on the road, and the Ferrari cant pull a nice heavy trailered nautique behind it.

I currently have the 1234 (Right hand version of yours)..and the 1578 as back up. I can give you some exact top rpm/top speed settings in 2 weekends time on the 1234 prop , as the boat is at a holiday house, unless someone can get back to you sooner with some speed recordings.
Also if you get the prop from Delta with the planet nautique discount from memory i paid $415 USD plus freight a couple months ago for the 1578 spare prop.

[AndrewC]

Thanks everyone,

I managed to get a second hand 1235 prop off eBay that has been used once for a pretty good price. If we want to foot on the odd occasion, then we will just swap the props. For the number of times we actually foot, this will not worry us.

Thanks

[Neverenough]

I have an 08 220 w343 and run a lot of extra weight. Usually have plenty of people with is too. We run a 1235 and on smooth water we get 39 at WOT. Loaded with water it will still get on plane. Not very fast but it will. I'm not sure you can go wrong with 1235.

[jsta281]

Thanks everyone,

I managed to get a second hand 1235 prop off eBay that has been used once for a pretty good price. If we want to foot on the odd occasion, then we will just swap the props. For the number of times we actually foot, this will not worry us.

Thanks

let me preface my response by saying everything I have learned on the prop topic I have learned from tim. The truth is there is really no way to know what prop is the best without lots of data starting with engine size max top speed and rpm at that speed with current prop. It is possible to increase hole shot and top end if you are running to much pitch for your set up.

[scottb7]

I used the ACME 1433 4 Blade 14" x 14.25" Propeller for first time Sunday. It was pretty great! We had what we call one button press all the way around. Meaning stock ballast all full. (I have the rear tanks gone and have 1100 sacs.) I am confident that we can sac out quite a bit more with no problem.

In the time it would have taken the stock prop to get on plane I glanced down and we were at 35 miles per hour. You just slide up onto plane with very little / no noticeable bow rise. It is somewhat like having a different boat.

[Mikeski]

I have the same needs as on my 211. After trying literally 8 different props on my boat I finally settled on the 644 (645 for your rotation). It is the same as what you are currently running but the 0.25" smaller diameter helps it get out of the hole a little quicker. The 1234/5 was not good at ski or footing due to increased prop wash. I also have a 856 but I only run it at altitude.


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[Mikeski]

I have not tried a 14" prop, might work for you but I prefer the ski wake with a smaller prop


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