Supra SL Prop RPMs and GPH

[pedel]

For those of you enjoying your new SL's (like I am!), I'm curious what engine/prop set up you have and what you're seeing in terms of RPMs and GPH while surfing. Here's my info:

- SL450
- Sea level
- Full Stock + 800lbs lead + 2-4 people in the boat
- Prop: Acme 2973 15x11 altitude prop
- Surfing 10.8 - 11.2 MPH
- RPMs 3800-3900 @ 11.2 MPH
- GPH: I just started tracking but my last tank was 6.3GPH

Even though the GPH isn't bad, I'd sure love to cut some RPM's and noise down. I'm thinking that since I'm at sea level my prop is a bit aggressive, but look forward to what others are seeing and your thoughts.

Thanks!

[Ryann]

I'll post back when I take delivery and get it broken in. It may be a couple months though before I get solid data. I hope it's more like 3200 rpm. My axis would surf around 3000 rpm. Might be a good time for you to buy a prop and keep the 2973 as

SL 400
Acme 2775 15 x 12.5 (pro orders all them with this prop)
I own 400 lbs of lead. I'm going to see how it does without any at all.

[elevatedconcept]

We are doing some testing on an SL450 at the shop with a 16/12.5... should be in the water tomorrow. Ill report back what the performance is around sea level.

[Ryann]

We are doing some testing on an SL450 at the shop with a 16/12.5... should be in the water tomorrow. Ill report back what the performance is around sea level.

Very interested. Please report back. Do you have any idea how big a prop you can go without having clearance issues?

[shockthis]

We are doing some testing on an SL450 at the shop with a 16/12.5... should be in the water tomorrow. Ill report back what the performance is around sea level.

Elevated Would be very interested in your thoughts of surf set ups on this boat, I have seen the pictures of what you do with the RZX wave.

[Ryann]

Any news on the 16 x 12.5?

[Charlie99]

Any new updates guys?

[shockthis]

I run about 3200-3400 rpm , not sure about the Gph

[Ryann]

Acme 2775: 3200 rpm 11.0 mph surfing with ballast. In my opinion, it's the perfect prop.

My gut says I would not go with a bigger diameter for prop clearance reasons. It looks tight as is.

[pedel]

Good timing on this question, because I just swapped props last night. I previously had the Acme 2973 15x11. I run with an extra 900lbs of lead and usually just a couple of people in the boat. I've been consistently running at 3900 RPM's. My dealer talked to SC, and they suggested I go with the stock prop Acme 1235 14.5x14.25. I just surfed it this morning and was averaging about 3600-3700 RPMs. I was kind of surprised they suggested this vs. the 2775 but figured I'd give it a try. But I have to give a huge shout out to my dealer who is swapping props out for me at no cost...it's a new boat and he's been super cool working together to figure out the best set up without having to roll the dice on buying new props!