What prop 1235 is to much

[rensink]

What prop do you guys think i should try next tried the stock 537 which pulled to many RPM's tire warranted it for a 381 boat pulls enough RPM's but with the weight it's a dog out of the hole. I ran the 1235 preferred like a dream but to many RPM's once again.

Motor is PCM 6.0L 409hp
Ballast 2,000lbs
+ people
= close to an average of 3200lbs
What prop can you guys recommend that will pull the correct RPM's and still plane out?

[Wickedcummins]

What are you trying to say by too many RPMS

[knelems]

I would call or email Bill Weeks at Acme, he is very helpful.
Bweeks@acmemarine.com

[rensink]

By to many RPM's I mean to many the PCM 6.0L is only supposed to turn roughly at max 5400 with the 1235 and stock 537 it'll turn close to 5900-6000

[laserfish]

What are your RPM's while boarding or surfing? I would think that is the most important. If you drop the pitch, any boat will hit the rev limiter. But you need the lower pitch to move the ballast. Trade off.

[helmut]

Would be worth contacting Eric over at OJ. Travis seems real happy with this prop. Check out the rpms on his x star weighted up.

http://www.wakeworld.com/forum/showthread.php?t=788869

[jmhatchett]

By to many RPM's I mean to many the PCM 6.0L is only supposed to turn roughly at max 5400 with the 1235 and stock 537 it'll turn close to 5900-6000

You shouldnt be running it that way anyhow, the only thing in control of the RPM's is the driver. Keep your throttle lower and you wont ever need to worry about how hard your engine runs at WOT.

That being said if you run 3200lbs you NEED the 1235, I had the 537 on mine but started adding a little more weight every time and it got sluggish out of the hole compared to the 1235. You lose 2-3 MPH off the top end but at wakeboarding or surfing speeds you cant beat that prop for the situation you are in... IMO.

[JreisRZR]

I have a 1631 that came from the factory on my ex343, I run 47.2 @ WOT @ 5300 rpm in my rzr, it is supposedly a reworked 1237 to help with top end by adding cup, but don't quote me on that, ita just what I read, I also run 1600# and people and gear for a total of about 2k-2.5k, I wanna say it turns 3300 wakeboarding. Maybe take a look at the 1237 and 1631

[Duncan]

Good read. I do not understand how a prop picks up both a better hole shot and lower rpm at speed, as some on that thread reported.

Makes we wish I knew more about prop design, especially as influenced by an engine's torque curve.

From my limited understanding, I do not think the OJ-X5 would eclipse the 1235 on hole shot and probably not rpm at non-planing surf speeds. Maybe less slip/cavitation (which is not a probelm on my PCM 409 after moving to the 1235.

But from WW thread, it sounds like if you are upgrading for wakeboard speeds and heavy ballast, the OJ-X5 is worth considering.

Maybe some TO prop genius will step in here and set me straight

[talltigeguy]

Good read. I do not understand how a prop picks up both a better hole shot and lower rpm at speed, as some on that thread reported.

Makes we wish I knew more about prop design, especially as influenced by an engine's torque curve.

From my limited understanding, I do not think the OJ-X5 would eclipse the 1235 on hole shot and probably not rpm at non-planing surf speeds. Maybe less slip/cavitation (which is not a probelm on my PCM 409 after moving to the 1235.

But from WW thread, it sounds like if you are upgrading for wakeboard speeds and heavy ballast, the OJ-X5 is worth considering.

Maybe some TO prop genius will step in here and set me straight

You may have seen my response in the thread. I was extremely disappointed that Eric from OJ posted, but did not bother to give the logic behind why the X5 might perform better. Can a 5 blade have a greater surface area at a lower pitch to give equal low end torque, but better midrange performance?

I did put a lot of stock in what guys from the performance boat world had to say about more blades being very commonplace on those boats and how it helped.

[NICKYPOO]

In theory, given equal surface area, a lower number of blades should always be more efficient. Now that they are really tweaking the shape and cup, maybe they found something in the five blade they really like. One thing to remember is that the evolution of the wake boat is still in toddler stage. Think of 10 years ago compared to today. When I switched from the old 4 blade OJ to a new 3 blade ACME, it was night and day.