Page 2 of 13 FirstFirst 123412 ... LastLast
Results 11 to 20 of 122
  1. #11
    performance enthusiast AD4342's Avatar
    Join Date
    May 2006
    Location
    Abu Dhabi, UAE
    Posts
    296
    +1
    1
    what about where to bend the leading edge? I know I would rather not to but I would like to do some experimenting and I would like to bend at the right place.


  2. #12
    pet's Avatar
    Join Date
    May 2006
    Location
    Washington DC metro
    Posts
    1,306
    i just bend the very end of the prop, i was trying to increase to get 200rpm more and when i vent out to test ride I lost 200rpm, how that happend ? i think i need an advice

  3. #13
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    37,518
    +1
    2,953
    You probably bent it the wrong way.

    Picture the impeller sitting in the pump which is installed in the ski.

    Bend the blades up towards the front of the ski for more RPM's
    Bend the blades down towards the back of the ski for less RPM's

  4. #14
    pet's Avatar
    Join Date
    May 2006
    Location
    Washington DC metro
    Posts
    1,306
    HA HA HA... increase/decrease...
    i got it fixt, thanks again Jerry

    will the top end or the bottom gonna improve?
    Last edited by pet; 06-27-2007 at 06:37 PM.

  5. #15
    hsdforever's Avatar
    Join Date
    Apr 2007
    Location
    French west indies
    Posts
    167
    I have a lot of question... sorry !

    When someone say "i repitch impeller..." it's the same operation ?

    one will call the propeller shaft part FRONT and the part pumps the BACK, ok.

    If my impeller is a 13/19, i made this tip's for increase pitch, I draw the blades towards the BACK. the new pitch will be a 14/19 ? a 14/20 ? I will win speed ?

    Must I give a millimettre to all the blade AND all the blades? or must I only give a millimetre on half (and with identical on all the blades)?

    I have a 14/20, my engine pains to start, taken it again in jump of wave is not signal, only speed in flat water is better. if I twists the blades forwards, I would gain in start or re-start ? is what I would lose of speed?


  6. #16
    hsdforever's Avatar
    Join Date
    Apr 2007
    Location
    French west indies
    Posts
    167
    Someone help ?

    thanks a lot....

  7. #17
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    37,518
    +1
    2,953
    Does this pic help?
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	impbend_127.jpg 
Views:	2673 
Size:	86.9 KB 
ID:	29607  

  8. #18
    hsdforever's Avatar
    Join Date
    Apr 2007
    Location
    French west indies
    Posts
    167
    Yes, a little... i want understand more... sorry... I buy a SOLAS 14/20 btu my engine is stock (air filter only), i win speed but in offshore or for holeshot it's a big shi...

    I want to made a 13/20 to start qickly and don't lose speed... can i decrease pitch like the photographie on my impeller for this result ? Or may i put my origin's impeller ?

    thanks...

  9. #19
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    37,518
    +1
    2,953
    You can decrease pitch like you see in the pic. Move it 2 mm to start with.

  10. #20
    pet's Avatar
    Join Date
    May 2006
    Location
    Washington DC metro
    Posts
    1,306
    Quote Originally Posted by Green Hulk View Post
    Move it 2 mm to start with.
    i did 2mm and i got 250rpm back, now i am at 8050rpm.....should i pitch it a litle bit to get 8100 or just let it be ?

Page 2 of 13 FirstFirst 123412 ... LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Impeller pitch ?
    By Piney in forum 4-Tec Performance
    Replies: 5
    Last Post: 07-02-2010, 08:42 AM
  2. RXP speeds vs rpm and impeller pitch
    By Vern in forum 4-Tec Performance
    Replies: 21
    Last Post: 02-10-2007, 11:35 PM
  3. Question on impeller pitch....14/19...14/17....15/20...?
    By GeoRXT in forum Sea Doo Open Discussion
    Replies: 1
    Last Post: 04-24-2006, 05:07 AM
  4. Impeller Pitch's
    By Alaska05RXT in forum 4-Tec Performance
    Replies: 3
    Last Post: 04-19-2006, 08:52 AM
  5. Impeller Pitching Questions
    By 1FastTrespiper in forum 4-Tec Performance
    Replies: 43
    Last Post: 01-04-2006, 10:28 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •