Results 1 to 3 of 3
  1. #1

    Cold air intake questions for the brain trust........

    I have the seats and the seat support out of my '05 RXT and and have been looking at designing a cold air system for it. One of the questions I have is this: There is an oval shaped tube that exits the hull right in front of the front seat,and it just runs down to the bottom of the hull. It is ONE of the air supplies to the hull for the engine already. Do you think there would be enough flow into that pipe to support the engine for a stand alone air supply,or do you think the seat itself would restrict it to much? There appears to be a couple of inches between the seat frame and the actual opening of this tube,but the seat material fits pretty close to the hull in that area. I believe the seat would help keep water out of the tube and the engine if I decide to do this. The other option I have been looking at, is to tie this tube AND the one that gets it's air from the seat support, together and then directly into the supercharger. I know there would be enough flow then,but ,with either option,there isn't enough space for a K&N element so I may just do like BRP does and run without a filter. Any thoughts good or bad, on this idea are appreciated. I really need to devise a TRUE cold air system for this boat. TIA

  2. #2
    Gotta love this sport! 05Limited's Avatar
    Join Date
    Apr 2005
    Stockton, CA

    Opinions will vary, but I can only offer what I've determined.

    If you measure the opening under the sides of the seat and calculate the area in square inches, it is much greater than the square inches of the hole just in front of the seat... no problem.

    Running a 3" x 5" oval, necked down to a 3" round tube to the entrance of the PowerFlow intake would then isolate ANY hot, hull air from entering the SC.

    Removing the K&N to do this will undoubtedly draw thead responses.

    Some will say this increases the risk of ingesting foreign objects. I suppose this is true to some degree, however, the stock system doesn't have a filter/screen either... just don't open the seat and through something in the hole while it's running... LOL

    Many will say the biggest threat is water ingestion. To be honest, this concerns me as well. However, the system you describe, and the set-up described above, is exactly the way I have been running my '05 Limited since February. I have watched the bow spray approach the hull after coming off a wake/wave and have never witnessed enough water in that area to alarm me... but it could happen. The Limited's leg fairings do add a bit more protection. Go ride it hard, get some air, and make your own determination... I'm confident my riding stile and locations will never cause me problems

    e-mail if you want any help:


  3. #3
    Thanks for the reply and the offer of help,Jeff! I have been looking at this all week, trying to come up with a way to do this,that will be both efficient AND easy to switch back to stock,should the "need" ever arise I have another idea about how to do this AND be able to use a filter,but I need to get a K&N catalog and dig my tape measure out! You just may get an e-mail or two from me

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Custom cold air intake for a Speedster 150
    By VX1 in forum Sea Doo Sport Boats
    Replies: 26
    Last Post: 07-18-2020, 12:58 PM
  2. Yamaha VX DIY Cold Air Intake Question ....
    By misterjay in forum Yamaha PWC Performance (4-stroke)
    Replies: 0
    Last Post: 07-28-2011, 05:52 AM
  3. Cold air intake question
    By miniion26 in forum Kawasaki PWC Performance (4-stroke)
    Replies: 1
    Last Post: 06-24-2009, 08:18 PM
  4. New Cold Air Intake for Diesel Trucks Ford, GM and Dodge
    By 800AMSOIL4U in forum Open Discussion
    Replies: 0
    Last Post: 01-25-2008, 08:47 PM
  5. What the best air intake system for an RXP as Spring 2006?
    By Jarrett in forum 4-Tec Performance
    Replies: 44
    Last Post: 04-15-2006, 09:33 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