Props to address Cutwater performance

[ucarrasquilla]

Does anybody know the difference between the Power Tech OFS5 and SCE5 in terms of performance?
I have a Cutwater c-32 coupe. The c-32 refuses to get on a plane below 27 knots. It also drinks gas heavily between 6 and 26 knots.
I normally cruise Puget Sound, the San Juan and Gulf Islands. My prefered speed would be between 15 and 26 knots.
Or should I be considering a different set of props? I normally fill up full and run to half empty. I keep the water tank mostly half full.
I normally don't load much since my wife and I end up eating at the different locations we visit.
Between my wife and I we weight 300 pounds.
Also, anybody knows how to get the attention of the people at Power Tech.
I have tried contacting them via their Web Site contact-us request, e-mail, phone call to the operator who connected me to a sales person's voice mail. Two weeks and no response.
I am trying to get the ext-tube welded as recommended in this forum. A distributor in Anarcortes indicated I would need to talk to Power Tech to get it done.
If it is not Power Tech, is there any other competing product?

 

[WWIProps]

I got a hold of the receptionist at the PowerTech front desk and she put me in touch with John Parker who was very helpful. I have a Cutwater 32CB and just installed the OFS5 CSE. I am not quite ready to publish my data as I have not had a really smooth day to properly compare the new props to my factory setup data. Preliminary results shows my performance is pretty much in line with Mike and Sarah's Solara 31 data. I have lost about 3-5mph (51mph down to 47mph) off of the top end speed and have seen significant efficiency gains around 42-4400 rpm. The hole shot is great and I get on a plane around 3400 rpm/21mph/.96gph. I cruise at 4200rpm/33mph/1.2gph. I am surprised the counter rotating prop (starboard) engine is burning more fuel in the midrange than the standard rotation (port side) which did not present with the original props. The WOT and below 2500rpm fuel consumption is the same on each engine. The boat seems to run flatter with the new props. Again, I need to do some more testing with slack tide and smooth water.

Overall I am very pleased and I recommend the upgrade.

 

[Submariner]

Does anybody know the difference between the Power Tech OFS5 and SCE5 in terms of performance?
I have a Cutwater c-32 coupe. The c-32 refuses to get on a plane below 27 knots. It also drinks gas heavily between 6 and 26 knots.
I normally cruise Puget Sound, the San Juan and Gulf Islands. My prefered speed would be between 15 and 26 knots.
Or should I be considering a different set of props? I normally fill up full and run to half empty. I keep the water tank mostly half full.
I normally don't load much since my wife and I end up eating at the different locations we visit.
Between my wife and I we weight 300 pounds.
Also, anybody knows how to get the attention of the people at Power Tech.
I have tried contacting them via their Web Site contact-us request, e-mail, phone call to the operator who connected me to a sales person's voice mail. Two weeks and no response.
I am trying to get the ext-tube welded as recommended in this forum. A distributor in Anarcortes indicated I would need to talk to Power Tech to get it done.
If it is not Power Tech, is there any other competing product?

Full disclosure: PowerTech is a channel sponsor.

The difference between the SCE and the OFS is blade geometry and diameter. SCE is a 14” diameter, OFS is 15.25” diameter.

I have spoken with and/or worked with owners on a C-288 (Twin F250’s), C302 (Twin F300’s) and a Solara S-310-SB (Twin F300’s). All these boats worked well with a pair of OFS5-16-EXT (OFS, 5 blade, 16 pitch, with the Exhaust Tube/Channel Surfing edition). The C302 performed fantastic with a pair of the OFS5-16-EXT’s. I suspect your C32 will perform similar.

I have all this documented, as well as specific information about ordering published on our website.
Https://csurf.co/powertech

The Channel Surfing edition prop’s are only available direct from PowerTech. They take 8-10 weeks to make once ordered. PowerTech hasn’t released them to the dealer network so no prop shop’s can assist. The prop’s are also patent-pending (the exhaust tube is the patent pending). PowerTech welds them together as the original 3 piece install wasn’t nearly as popular. The exhaust tube’s primary function is to improve fuel efficiency, stern lift, in the mid-range RPM band.

Let me know if you have additional questions.

 

[Rocky Lou]

There's quite a lot of data published on specific performance numbers that various folks have achieved. The net of if in my case is that I tried a slew of props from Sharrow and PowerTech and settled on the OFS5/16 with extension tubes (referenced on website above). The SCE props did nothing to lift my stern heavy boat with twin engines, generator, full gas tanks and sometimes a tuna bag on the swim platform. Changing to the PowerTech props was like getting a new boat.

 

[ucarrasquilla]

Thank you all for your response. I contacted John Parker@ Power Tech via e-mail.