User Tag List

Page 1 of 50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 ... LastLast
Results 1 to 15 of 740
  1. #1
    Join Date
    Aug 2011
    Location
    Lake Mälaren, Sweden
    Posts
    770
    Thanks (Given)
    54
    Thanks (Received)
    15
    Likes (Given)
    69
    Likes (Received)
    52
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Looper exhaust porting

    If I make my exhaust ports (bridgeport looper)wider, would that make low end torque suffer?
    I want to shape them like a letter "L", turned upside down...

  2. #2
    Join Date
    May 2001
    Location
    New Hill, NC
    Posts
    1,505
    Thanks (Given)
    0
    Thanks (Received)
    1
    Likes (Given)
    0
    Likes (Received)
    3
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If you just widen them, you'll make everything better. Just don't raise them unless you know exactly what you're doing.
    Tony Brucato


    (919) 718-0249

  3. Likes HaulNbass liked this post
  4. #3
    Join Date
    May 2001
    Location
    The Villages, Florida
    Posts
    5,293
    Thanks (Given)
    10
    Thanks (Received)
    162
    Likes (Given)
    71
    Likes (Received)
    262
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    .150 wider at the top and taper to orginal at the bottom but unless you do the right intake work it will not add any power

  5. Likes HaulNbass liked this post
  6. #4
    Join Date
    Aug 2011
    Location
    Lake Mälaren, Sweden
    Posts
    770
    Thanks (Given)
    54
    Thanks (Received)
    15
    Likes (Given)
    69
    Likes (Received)
    52
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by racer View Post
    .150 wider at the top and taper to orginal at the bottom but unless you do the right intake work it will not add any power
    Thanks Racer!, will do that!
    The right "intake-work" are you referring to changes in duration on transfer/boost ports?
    I have already cleaned the intake mainfold up - taken away all sharp corners and added CCMS reeds. What is your opinion on shaving the heads? Boat is appx 2200lbs, prop is 22"raker, boat mainly used for skiing and recreation, no long wot-runs, maybe a minute max. I want to be able to use 91octane.

  7. #5
    Join Date
    Sep 2009
    Location
    iowa
    Posts
    674
    Thanks (Given)
    1
    Thanks (Received)
    2
    Likes (Given)
    5
    Likes (Received)
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by racer View Post
    .150 wider at the top and taper to orginal at the bottom but unless you do the right intake work it will not add any power
    .150 wider at the top overall or each window of the Bridgeport? Can you please elaborate on the intake work needed? It seems that these loopers are a black art when it comes to mild porting.
    1975 Hydrostream Ventura II
    1987 evinrude 200xp

  8. Likes HaulNbass liked this post
  9. #6
    Join Date
    Aug 2011
    Location
    Lake Mälaren, Sweden
    Posts
    770
    Thanks (Given)
    54
    Thanks (Received)
    15
    Likes (Given)
    69
    Likes (Received)
    52
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    A couple of questions;
    .150 must be like 4mm, anyone to confirm?
    still trying to learn the inch system...
    When you guys write .150, you mean 0,150 of an inch -right?

    Any good tricks concerning cleanup after porting and honing?
    compressed air, what else?

  10. #7
    Join Date
    Jun 2007
    Location
    Singapore/Melbourne/Italy
    Posts
    6,762
    Thanks (Given)
    480
    Thanks (Received)
    195
    Likes (Given)
    1923
    Likes (Received)
    839
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    reverse the water flow, hotter chest and therefore faster exhaust gas speed, maybe get the same result?
    then you might need to do a hot hone to ensure the exhaust runner expansion is allowed for?
    might need to add a water outlet on the top of the chest as well...just dreaming here...

  11. Likes HaulNbass liked this post
  12. #8
    Join Date
    Aug 2011
    Location
    Lake Mälaren, Sweden
    Posts
    770
    Thanks (Given)
    54
    Thanks (Received)
    15
    Likes (Given)
    69
    Likes (Received)
    52
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    About cleaning, how do you guys get all the metalflakes away when porting is completed - hot water?
    another thing; good webshops? My recent purchases were from boats.net, any other good/cheap stores out there?
    a third thing; can a "bobs exhaust snout" help prevent bogging when throttled up?, I am using a raker 22" with about 10mm ventholes. I have already drilled through the two holes in the mid, all the way into the exhaust cavity, improved the idle a bit. Now I want do a more aggressive exhaust mod in order to get rid off the of idle bogging. - Some more noise is ok, but not too much... Drilling above the anticav plate seems to be begging for to much noise!?

  13. Likes HaulNbass liked this post
  14. #9
    Join Date
    Jul 2005
    Location
    Regina SK. Canada
    Posts
    560
    Thanks (Given)
    0
    Thanks (Received)
    9
    Likes (Given)
    2
    Likes (Received)
    29
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Just to confirm your conversion 0.150" equals 3.81 mm .

  15. Likes Will hedrick, HaulNbass liked this post
  16. #10
    Join Date
    Nov 2003
    Location
    Va. Beach, Va.
    Posts
    158
    Thanks (Given)
    0
    Thanks (Received)
    5
    Likes (Given)
    0
    Likes (Received)
    7
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Captain75 View Post
    My recent purchases were from boats.net, any other good/cheap stores out there?
    I ordered some parts from boats.net in August. I received a letter from them in October telling me that they found mal-ware on the checkout section of their website, which may have been on their since January. I had my credit cards replaced even though nothing looked out of the ordinary. I had ordered parts from them in April and did have 4 or 5 charges that we're not mine during the next month. I had to change cards after that as well.

  17. Likes HaulNbass liked this post
  18. #11
    Join Date
    Apr 2004
    Location
    phoenix, az
    Posts
    1,211
    Thanks (Given)
    3
    Thanks (Received)
    4
    Likes (Given)
    1
    Likes (Received)
    11
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Cleaning... Hot hot water with degreaser/dawn soap everywhere until you think it is clean enough. Then do it two more times. Pressure wash if you have one. Then immediately lightly coat all the steel sleeves with the oil you plan on running. It can never be too clean.

  19. Likes HaulNbass liked this post
  20. #12
    Join Date
    Nov 2003
    Location
    Michigan
    Posts
    333
    Thanks (Given)
    1
    Thanks (Received)
    3
    Likes (Given)
    9
    Likes (Received)
    50
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Cannot stress this point enough!! It's amazing how much damage can happen the first time you fire it up if it isn't clean enough. I use the whitest towels I have on everything after it's cleaned, if there is a hint of grey...it gets washed again.
    Quote Originally Posted by lokinutz View Post
    Cleaning... Hot hot water with degreaser/dawn soap everywhere until you think it is clean enough. Then do it two more times. Pressure wash if you have one. Then immediately lightly coat all the steel sleeves with the oil you plan on running. It can never be too clean.

  21. Likes HaulNbass liked this post
  22. #13
    Join Date
    Dec 2011
    Location
    Sunny Oregon
    Posts
    1,770
    Thanks (Given)
    0
    Thanks (Received)
    1
    Likes (Given)
    1
    Likes (Received)
    12
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I just stick my stuff in the dishwasher when the old lady is at work. It comes out clean.

  23. Thanks Will hedrick thanked for this post
    Likes upyours, OMCFREAK, Will hedrick, HaulNbass liked this post
  24. #14
    Join Date
    Aug 2011
    Location
    Lake Mälaren, Sweden
    Posts
    770
    Thanks (Given)
    54
    Thanks (Received)
    15
    Likes (Given)
    69
    Likes (Received)
    52
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    First porting pics...Click image for larger version. 

Name:	image.jpg 
Views:	814 
Size:	179.7 KB 
ID:	287661
    Exhaust 4mm wider at the top, tapered to stock at bottom.
    area surrounding protected by ducttape.

  25. Likes HaulNbass liked this post
  26. #15
    Join Date
    Sep 2009
    Location
    iowa
    Posts
    674
    Thanks (Given)
    1
    Thanks (Received)
    2
    Likes (Given)
    5
    Likes (Received)
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is that 2mm wider for each window or 4mm?
    1975 Hydrostream Ventura II
    1987 evinrude 200xp

  27. Likes HaulNbass liked this post
Page 1 of 50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Chris Carson's Marine