ACME 2775 for 2017 RZX2

[BrewKaiser]

ACME is recommending a 2775 (15 X 12.5) for my '17 RZX2.

We mostly surf but I do like to pull the slalom out every now and then. We run pretty stock, but may put some PNP in the lockers in the future. Just wanted a more efficient prop for surfing, with a bit more hole-shot when loaded.

Anyone see any issue with 2775 for my needs or recommend something else?

[tigemech]

How many rpms are you currently surfing at? What is your elevation?

[Germaine Marine]

Does your rzx2 have the 2-1?

[BrewKaiser]

No 2-1.
Elevation 450
RPMs: Mid 3000 (we surf 10.8 to 11.4 MPH)
Raptor 440

Stock prop was OK, but I wanted a spare (JiC) so I decided to have a new prop installed and stow the factory stock as a spare with prop puller kit. Folsom Lake has a ton of debris early in the season so figured it prudent to always keep the extra on hand and ready.

[Germaine Marine]

i would go as much diameter with the 1.5-1 and the 440 as possible room wise. If you can squeese a 16 in there I would.

[BrewKaiser]

OK, Thanks @elevatedconcept I'll see what we can do.

[tigemech]

had a rzx2 with the 440, and pnp, about 1400ft put a 2315 prop on it. ran 3400 rpms and had a great hole shot over stock prop. Problem is youre not going to get more efficient and a better hole shot, possibly with a larger diameter, but hard to say.

[BrewKaiser]

Thanks all. Turns out my dealer went ahead and ordered and installed the 2775 during 20hr service while we were on vacation. Since it was already on, I said I would give it a shot and if not happy return and replace with larger diameter.
With stock ballast full (no PNP or Lead) hole shot is good and cruising 11 mph around 3100 RPM. Spent about 6 hours on the lake this weekend and only surfed. Definitely noticed lower fuel consumption.
Top end is certainly slower with 32 MPH at 4500 RPM, but that's OK for me for the few times I slalom or for the brief in/out from marina.
I plan to get some PNP soon so I'm sure I'll re-evaluate then, but I don't plan to go all out beast mode with ballast as we're purely recreational.
So thanks again for all the advice and it is noted and taken to heart for future needs.

[Germaine Marine]

I would look into adding some cup back in Brew..... thats gonna give you some top end cruise back without taking away anything on the bottom.

[BrewKaiser]

I would look into adding some cup back in Brew..... thats gonna give you some top end cruise back without taking away anything on the bottom.

You really are the Tige Whisperer, Elevated. Thanks for the recommendation. I'll discuss with the service guy at the dealer. You have an ACME # in mind? If not, no sweat, I'll work it out.

[Germaine Marine]

You really are the Tige Whisperer, Elevated. Thanks for the recommendation. í*¾í´™ I'll discuss with the service guy at the dealer. You have an ACME # in mind? If not, no sweat, I'll work it out.

No need to change props if you like that one. On an off week or weekend, take it off and send it in. Have them add .40 thousands. That is the equivalent to adding an inch of pitch. Should be rather inexpensive. Call acme and ask for Todd Diekevers you can tell him Jason (me) gave you his name.

That change in cup should drop rpm, run a little better on top.


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[Bakes5]

32 MPH @ 4500 RPM is about what the Z3 does with a 12 pitch 2219 prop.

Regarding props and cup.

So I have a Z3 with the 440. I have an Oj 15x14 and an Acme 15x14.25 w/ 0.150 cup. For some reason the Acme dogs out pretty quickly as crew/weight goes up. It runs about 200 RPM slower at all speeds which is great but absolutely loses hole shot for slalom compared to the OJ. The OJ isn't as affected by crew size. I think the limit for a Z3 is 15x14 with the 1.5 tranny. RZX2 is about 800-1000 lbs heavier.

Your setup (32 mph at 4500 RPM) sounds a little on the tractor side....which is exactly where you want to be if all you do is surf. I would think anything more than a 13 pitch prop would suck on an RZX with the 1.5 tranny.

[BLucas86]

I run a 2775 on my RZX3 at sea level. Dropped RPMS a few hundred over the 2419 and seems to do really well. The only time I've had an issue was when sacked out with 4200 lbs and a crew of 14. Couldn't run full ballast in rear with the 440 motor.

Assuming you're going to slam this RZX2 and you're at or around sea level, your total weight should be around the same as mine.

Good luck. Nettle props in Austin has a great program. Give them a buzz if you don't have a source.

[BrewKaiser]

@Bakes5, we do mostly surf. I have yet to test slalom as I'm nursing a meniscus tear, but may add some cup as Elevated suggests. Realistically, I think there will be pure slalom days when conditions are right and a few slalom enthusiasts are on board. For these days it wouldn't take much to swap back to stock prop. For the few hours we can make it out, filling and draining ballast for different set ups is just wasted time anyway. Most people want to surf anyway. The early AM Slalom crew is a different story...

@BLucas86 thanks for the feedback. I don't plan to slam it, but 3500-3700 with 4-7 people will likely be where we max out.

I need to pick a hobby that doesn't require so much thought. Between this and home brewing my hobbies are starting to feel like work....

[Bakes5]

Sucks about your meniscus. Get if repaired/debrided pronto if you have not already.

I hate filling and draining ballast...which is why we surf very little.

You should try out a hydrofoil. Those are easy on the knees and you can still go big when you are an old man.