Boat Design Forums  |  Boat Design Directory  |  Boat Design Gallery  |  Boat Design Book Store  |  Thanks to Our Site Sponsors
Old 08-22-2006, 12:01 AM
Luchog Luchog is offline
Junior Member
Join Date: Dec 2005
Rep: 20 Posts: 31
Location: Rosario, Argentina
Prop change for improving hull performance

My boat is almost 19', setup is a Ford 6 inline engine with 170hp with a Volvo 280 sterndrive.

I run a 15x15 High Speed Propeller, boat reaches 4350rpm (engine max is 4500) at WOT, thing is this prop is a bit corroded and cavitates, and finally last weeked the hub went off.

Now I want a new prop, how will a Michigan or Super High Speed prop (long hub) affect boat performance, hull and bow altittude? Or Should I just get a new High Speed prop and expect much better performance?

I also noticed my rub rail gets VERY close to the water when doing some turns at 22mph, is there a chance some prop will affect hull attitude so that the boat turns better?
or could it be that my prop was so cripped that it lost so much power?

thanks in advance
Attached Thumbnails
Prop change for improving hull performance-dsc00752.jpg  Prop change for improving hull performance-dsc00755.jpg  
Reply With Quote
Old 09-14-2006, 03:11 PM
mtnrat mtnrat is offline
Junior Member
Join Date: Jul 2006
Rep: 10 Posts: 53
Location: Canada
Is there anyone you know that has a volvo leg that you can beg borrow or steal props from to try? IIRC most volvo props are 14" in diameterfor a 270 leg. Just looked some ar 15" as well. Do you know what the original prop was, because that is likely what you want? Look here. .
Reply With Quote
Old 09-14-2006, 03:24 PM
Luchog Luchog is offline
Junior Member
Join Date: Dec 2005
Rep: 20 Posts: 31
Location: Rosario, Argentina
Mtnrat, thanks for the response.

I've already bought a 16x15 prop, it's based on a discontinued Michigan propeller, the boat has lost 200rpm and a bit of power out of the whole, but planes higher on the water and turns on a dime.
It seems the old High Speed propeller was too much damaged, perhaps I could have gotten another new high Speed and improve handling while keeping the RPM previous rpm range.
Anyway i'm happy.
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Improving Efficiency at 15-20kt joebobb Boat Design 18 09-02-2005
02:12 PM 
Can anyone give me information of modifying my hull for better performance? lovingthekeys Boat Design 1 12-22-2004
04:36 PM 
Prop performance danmarine Boatbuilding 0 05-20-2004
02:58 PM 
Prop performance danmarine Fiberglass and Composite Boat Building 0 05-19-2004
08:03 AM 
Wanted: Mold 28' V-Hull Performance Face It Boat Molds 0 12-22-2003
09:49 AM 

Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.

All times are GMT -4. The time now is 12:16 PM.

Powered by: vBulletin Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Web Site Design and Content Copyright ©1999 - 2015 Boat Design Net