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Thread: Supra SL Prop RPMs and GPH
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05-17-2018, 06:10 PM #1Member
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- Dec 2017
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- Seattle, WA
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Supra SL Prop RPMs and GPH
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!2018 Supra SL
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06-05-2018, 11:03 PM #2Senior Member
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- May 2018
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- Atlanta, GA
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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.
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06-06-2018, 01:15 AM #3Member
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- Jun 2018
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- 33
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.
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06-06-2018, 07:22 AM #4Senior Member
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- May 2018
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- Atlanta, GA
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06-06-2018, 10:07 AM #5Senior Member
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- Sep 2011
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- Christina Lake
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06-12-2018, 01:15 PM #6Senior Member
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- May 2018
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- Atlanta, GA
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Any news on the 16 x 12.5?
2022 Supra SL 400 ordered!
2019 Supra SL 400 passed on for summer fun
2018 Supra SL 400 Arrived and awesome!
2014 Axis A20 - Sold to a great family
1992 Supra Comp T6SM
1999 Nautique Super Sport
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07-11-2018, 05:32 PM #7Junior Member
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- Oct 2017
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- Sylvan Lake
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- 18
Any new updates guys?
2017 Supra SE 550
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07-12-2018, 01:49 AM #8Senior Member
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- Sep 2011
- Location
- Christina Lake
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- 171
I run about 3200-3400 rpm , not sure about the Gph
2018 Supra SL
2013 Nautique 210
2011 outback v
1992 Sunbird
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07-12-2018, 08:12 AM #9Senior Member
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- May 2018
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- Atlanta, GA
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- 119
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.2022 Supra SL 400 ordered!
2019 Supra SL 400 passed on for summer fun
2018 Supra SL 400 Arrived and awesome!
2014 Axis A20 - Sold to a great family
1992 Supra Comp T6SM
1999 Nautique Super Sport
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07-12-2018, 12:37 PM #10Member
- Join Date
- Dec 2017
- Location
- Seattle, WA
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- 34
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!
2018 Supra SL