Prop Specs ONLY

[SquamInboards]

Hi all, recently purchased a 1990 20' Supra Sunsport with PCM Ford 351 factory 230 HP. 475 hrs on engine. I have the 1:1 tranny. This is the first boat I've owned, although been around boats most of my life. Still, learning a ton of new info. This is exactly the post I was looking for so thanks to SquamInboards for initiating it. I will be using the boat mostly for skiing and wake boarding and just all around cruising. I know I have a three blade prop and I believe it's OEM, but sorry I don't have other details. I'd really like to know what others would recommend for my boat and usage. Thanks!

How's this for a delayed response?

Looks like the user above, 'Kip' has a similar boat, and the same engine/transmission. I'd call Acme or Skidim with that info and see what they think, but I'd look at the one Kip used (above in this thread).

Then, let us know what you end up with!

[Foe]

1983 Supra Sport
PCM Engine 260hp
Velvet drive 1:1 gear ratio

Old prop:
Federal Supercup 13x13 nibral

with approx. 1500lbs ballast very bad performance, poor hole shot, massive vibrations, wake was washed out
WOT 3900 rpm @ 40mph

new prop ACME 541 13x12 3-blade
feels like a new boat, no vibrations at all, excellent hole shot, better/cleaner/longer surf wake
WOT 4200rpm @ 40mph

ordered prop at nettleprops, shipping time 10 days to Germany.

We are super happy with the purchase!

cheers Flo

[LCYrace]

1987 Supra TS6m
351w, GT40p heads, Performer RPM intake, Edlebrock 1410
Velvet Drive 1:1

Acme 541 13x12 3-blade
Great holeshot, great ski wake, great fuel economy
WOT 4500~4600rpm @ 44-45mph depending on conditions and passengers

$369 from Wake Makers!!!!

[mbraun55]

purchased in fall - only ran to test drive... picking up in a week - concerned!!!

1990 comp ts6m
351w
1:1 I think
prop unknown - has spare

problem I have is during the test drive - 3800 rpm WOT and 38 mph was the max!!! I need more... hole shot was strong so i'm hoping I can change prop and gain a little top end but my concern is the wot at 3800 rpm seems low for a 351w...

I understand there are A LOT of factors that could effect this including but not limited to - bad fuel, dirty carb, bent prop (was so excited I was buying I never even looked - my bad) low compression (ran smooth) - what else could it be??? wrong prop size? best stock prop suggestion (what should the prop be???)

[Jetlink]

Could be a calibration issue with both as well. Just throwing that out there.

[scbowles]

91 Pirata
new reman 454 gen V with Edelbrock Performer Intake Manifolds 2561. Tbi Marine conversion. Ports matched. fresh air exhaust.
72c velvet drive 1,1
Acme 4 blade 14 x 12 #3033 .60 cup.
2000 rpm 17 mph
2200 rpm 24 mph
2800 rpm 30 mph
3000 rpm 32 mph
3400 rpm 34 mph
3600 rpm 37 mph
4200 rpm 41 mph
Using dual GPS speedometers.

[mikestanley464]

A propeller is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral, that, when rotated, performs an action which is similar to Archimedes' screw. It transforms rotational power into linear thrust by acting upon a working fluid, such as water or air.[1] The rotational motion of the blades is converted into thrust by creating a pressure difference between the two surfaces. VidMate
VidMate for PC | Canli Mac izle

[Larrys21V]

Hi all, recently purchased a 1990 20' Supra Sunsport with PCM Ford 351 factory 230 HP. 475 hrs on engine. I have the 1:1 tranny. This is the first boat I've owned, although been around boats most of my life. Still, learning a ton of new info. This is exactly the post I was looking for so thanks to SquamInboards for initiating it. I will be using the boat mostly for skiing and wake boarding and just all around cruising. I know I have a three blade prop and I believe it's OEM, but sorry I don't have other details. I'd really like to know what others would recommend for my boat and usage. Thanks!

Hi Rob

I hope all is going well with the SunSport! Every time I cross the wake of my 21V I miss your boat! The two props I gave with are both stock. you are correct. My understanding is that you wont find a prop that makes the boat go faster (due to Hull design). There may be a power prop available for wakeboarding, but I don't think you would need it unless you've added ballast bags to the boat. Not sure what you are looking to do. But I had 10 people in the boat and pull 3 skiers out.

Unfortunately, I don,t think you'll find a prop to make it go faster than 43 MPH due to hull design. Also I'd not mess with the RPMs if someone recommends that. I hope your enjoying the boat, I'm getting my out a lot this summer!

[korey]

Wanted to add my experience here

Boat Info: 1986 Supra Saltare, 22' open bow

Drivetrain Info: 454ci/330hp PCM 1:1 direct drive 1200+ hours

Prop Specs: ACME 209 4 Blade 13" x 12.5" 0.080 cup

Performance / Usage:
WOT unloaded: 4500RPM at 37.5MPH (ridesteady digital readout, GPS)
11.2MPH at ~2600RPM with ~1900lb ballast and wake sharper for surfing. Seems like it's working pretty hard, nearly not doable with more than 3 extra bodies onboard. No chance in the world of getting on plane with that weight.

Seems to cruise pretty happily unloaded at 2600RPM at 25-26MPH. Fuel consumption makes it seem like it's not in the secondaries of the carb, therefore fairly economical.

Switching to Acme 1229 (13x11 80 cup) this week to help ease load on the aging old girl while surfing. Hopefully I can avoid letting her spin too many R's when unloaded.

[korey]

Tried the 1229 out this weekend, and LOVE it! It's 13x11" 0.080" cup 3 blade.

WOT Unloaded: 4600RPM at 41.0MPH. Yes, it sped up and only turns 100 more R's than my old 209. I don't quite understand it, but it's true! The boat is "throw you out of the observer's seat" fast out of the hole now.

Surfed great with 1900lbs + 4 dudes all day. Decided to throw the long rope in with surf weight at the end of the day, and had NO PROBLEM getting on plane with 1900lbs of ballast and 4 dudes. I was blown away!

I don't love turning this old engine more RPMs all the time, but it sure does feel good...