Page 1 of 4 1 2 3 ... LastLast
Results 1 to 10 of 36
  1. #1

    Read this: Info on 4-tec motors, injectors,rrfpr's, etc.

    Attached is some info based on research done and information learned while recently trying to figure out why I was running lean with the addition of a Rude sc'r and rrfpr over the Rotax stage 3 kit I had previously. It was too cold today to go out and test, so I figured I would type this up and perhaps could help some others with similar questions.

    Mark
    Attached Files Attached Files


  2. #2
    EZ Dock of Long Island Shibby1485's Avatar
    Join Date
    May 2005
    Location
    Long Island, NY
    Posts
    9,464
    +1
    4
    Mark... outstanding!!

    absolute tremendous contribution to the forum, well done, VERY informative

    i like your apprroach and how you do things. dont just slap something on your ski without fully understanding how it affects each running condition of the motor and how it works and plays a role in performance.

    thanks!!!

  3. #3
    Moderator RX951's Avatar
    Join Date
    Apr 2005
    Location
    League City, Texas
    Posts
    16,066
    +1
    23
    wow, I love technical information. that was very straight forward !
    Thanks for the reading ! is this a sticky candidate ?

  4. #4
    Ride Hard! aha's Avatar
    Join Date
    Jul 2005
    Location
    Covina, Ca
    Posts
    2,009
    +1
    11
    That was a great write up Mark! The math kinda went over my head but I get the idea. Based on the formula you put in the doc I am wondering if someone can build a HP calc in excel... any math/excel wizzes around? haha

    I agree with you regarding monitor whats going on with your motor... I am doing a few upgrades and am not even planning on cranking the motor up without an AFR guage and boost gauge hooked up. Going to add a fuel pressure gauge to that list now

    Thanks again for the great info!.

  5. #5
    Site Admin Green Hulk's Avatar
    Join Date
    Apr 2005
    Location
    Morgan City, LA
    Posts
    36,398
    +1
    2,524
    Mark, thank you very much for taking the time to type that all up and share it with us.

    This is a must read for anyone modifiying their skis.

    I'm going to stick this one to the top for a while.

    Thank you very much!

  6. #6
    Mark is the real deal! THe first person I knew of that had a stageIII boat back in 05 with a 100 hours on it! He is definately a genuine guy! Good Job Mark! Very informative and your right about we need to monitor our engines more closely!

  7. #7
    daverxp4's Avatar
    Join Date
    Aug 2005
    Location
    montreal,canada
    Posts
    1,323
    Quote Originally Posted by Green Hulk View Post
    Mark, thank you very much for taking the time to type that all up and share it with us.

    This is a must read for anyone modifiying their skis.

    I'm going to stick this one to the top for a while.

    Thank you very much!
    how about puting it in the how to section faq there are alot of these we shouldadd to that section

  8. #8
    Happily Self-Employed WFO's Avatar
    Join Date
    Nov 2005
    Location
    Houston, Texas
    Posts
    12,801
    +1
    450
    95-100% duty cycle at 8100-8200 ?


  9. #9
    Quote Originally Posted by aha View Post
    That was a great write up Mark! The math kinda went over my head but I get the idea. Based on the formula you put in the doc I am wondering if someone can build a HP calc in excel... any math/excel wizzes around? haha

    I agree with you regarding monitor whats going on with your motor... I am doing a few upgrades and am not even planning on cranking the motor up without an AFR guage and boost gauge hooked up. Going to add a fuel pressure gauge to that list now

    Thanks again for the great info!.
    Here you go.
    Mark
    Attached Files Attached Files

  10. #10
    Ride Hard! aha's Avatar
    Join Date
    Jul 2005
    Location
    Covina, Ca
    Posts
    2,009
    +1
    11
    Thanks for the calc Mark!!

Page 1 of 4 1 2 3 ... LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. WTB - Parts Clamp for manifold to j-pipe on 4 tec motors
    By thetolleyman in forum Sea Doo 4Tec Skis
    Replies: 2
    Last Post: 08-27-2012, 04:24 PM
  2. Type of Clamps for Rear Drive Shaft Oil Seal on 4 Tec Motors?
    By thompsdw in forum 4-Tec Performance
    Replies: 2
    Last Post: 09-05-2011, 05:51 PM
  3. Need info on this
    By 1FASTXC in forum Polaris PWC Performance
    Replies: 11
    Last Post: 05-05-2007, 02:22 PM
  4. Need info on the concept of swapping injectors
    By Jarrett in forum 4-Tec Performance
    Replies: 6
    Last Post: 05-12-2006, 02:17 PM
  5. Every 4 Tec owner should read this!
    By MikeTrin in forum Sea Doo Open Discussion
    Replies: 0
    Last Post: 05-16-2005, 12:41 PM

Posting Permissions

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