Thread: Building A looper Beast

  1. #211
    BoatRacingFacts VIP Aeroliner's Avatar
    Join Date
    Mar 2008
    Location
    Lake Charles, Louisiana 70611
    Posts
    972
    Post Thanks / Like

    Default Fuel Pumps

    We run our Merc 44 with two pumps and turn the engine about 8,600 RPM. I know folks that only run a single pump on their 44 MOD engine and it works fine. I am sure the 5 pump configuration will provide far more fuel then is needed. The single feed line might be an issue but if this was made into a larger manifold it might distribute the fuel better.

    Second thought! Looking at the carbs they have a rubber hose between each carb so 6 carbs equal's five hose sections. If a tee was placed in each hose then the 5 pumps would connect very nicely and the engine would have a very nice balanced fuel system.

    Also remember that the 75-H engine only has 2 fuel pumps and a inlet fuel distribution block.


    Alan
    Attached Images Attached Images  

  2. #212
    Team Member GHMiller's Avatar
    Join Date
    Mar 2005
    Location
    Haslet, TX
    Posts
    49
    Post Thanks / Like

    Default

    Quote Originally Posted by R Austin View Post
    The issue was a real estate problem. If you look between each fuel pump there is a black nut. That is the nut on the stud holding the intermediate case, along with the main thru bolts, to the block. I reasoned that if 3 fuel pumps can supply 60 cubic inches, which is 20 cubic inches per pump, then the additional 40 cubic inches of displacement can be supplied by 2 more pumps at 20 cubic inches each. I do not care for electric pumps and the only other option was to pressurize the tank with crankcase pressure. I am sure the 5 pumps will be sufficient.
    I understand what you are saying, it make sense to me now, thank you for your explanation. I believe you are correct that five pumps should be sufficient. On my mod 44 I run one inline six, 150hp, fuel pump and it works perfectly.

  3. #213
    Team Member
    Join Date
    Jun 2005
    Location
    Eastern PA
    Posts
    762
    Post Thanks / Like

    Default

    Can anyone explain where all those fuel hoses in the photo are going to/ coming from?

    Jeff

  4. #214
    BoatRacingFacts VIP Aeroliner's Avatar
    Join Date
    Mar 2008
    Location
    Lake Charles, Louisiana 70611
    Posts
    972
    Post Thanks / Like

    Default 75-H fuel hoses

    The square block on the center fuel pump mount has the fuel inlet at the bottom hose. From the fuel block the upper hose feeds the top pump and the lower feeds the bottom pump. The carbs are all on a common fuel manifold with the upper pump feeding at the top and of course the lower pump feeding to the bottom. Hope this helps on the 75-H photo.

    Alan

  5. #215
    Team Member R Austin's Avatar
    Join Date
    Aug 2005
    Location
    ludington Michigan
    Posts
    266
    Post Thanks / Like

    Default

    Correct Alan, the plan is use 5 tee's in the hoses between carbs. The question is the number of fuel pumps it will take to supply the required amount of alcohol not gas. Having just 50% of the BTUs of gas, it requires twice the quantity. That's why the 3 pump comparison to the 60 inch looper was made. I have no doubt 5 are enough.

    your collection is absolutely incredible.

  6. #216
    Team Member
    Join Date
    Jun 2005
    Location
    Eastern PA
    Posts
    762
    Post Thanks / Like

    Default

    Outstanding explanation!

    Thanks.

    Jeff

  7. #217
    Team Member R Austin's Avatar
    Join Date
    Aug 2005
    Location
    ludington Michigan
    Posts
    266
    Post Thanks / Like

    Default

    Few more pictures of some of the small work that has to be done. Trimmed the sleeves on the block and faired in the transfer passages.

    Got the pistons back from coating process and fit to the cylinders and then fit up the rings. Now the block, case, and pistons are ready for final assembly. Just waiting on the completion of the center main bearing races.

    Welded up the drain passages in the back of the manifold reed cover. Then refaced both surfaces.

    While waiting on the bearings, I have started to modify the carbs and continuing work on the megaphone patterns. Coming up on the second anniversary of the start of this project. Now looking at the end of the tunnel.



    Name:  IMG-20131110-01703.jpg
Views: 709
Size:  121.7 KBName:  IMG-20131110-01701.jpg
Views: 713
Size:  138.1 KBName:  IMG-20131110-01702.jpg
Views: 705
Size:  88.1 KBName:  IMG-20131124-01710.jpg
Views: 717
Size:  151.4 KBName:  IMG-20131124-01711.jpg
Views: 716
Size:  117.7 KBName:  IMG-20131124-01712.jpg
Views: 728
Size:  291.5 KBName:  IMG-20131124-01713.jpg
Views: 713
Size:  283.1 KBName:  IMG-20130920-01594.jpg
Views: 703
Size:  143.5 KBName:  20131205_135352.jpg
Views: 704
Size:  110.9 KBName:  20131205_135321.jpg
Views: 701
Size:  139.5 KB

  8. #218
    Team Member F-12's Avatar
    Join Date
    Dec 2004
    Location
    USTS, FL
    Posts
    641
    Post Thanks / Like

    Default

    Beautiful, Mr. Austin.
    Charley Bradley


  9. #219
    Team Member
    Join Date
    Jun 2005
    Location
    Eastern PA
    Posts
    762
    Post Thanks / Like

    Default

    Your photography is also excellent, by the way.

    Jeff

  10. #220
    Team Member BJuby's Avatar
    Join Date
    Aug 2011
    Location
    Cold Spring, NY
    Posts
    322
    Post Thanks / Like

    Default

    That carb adapter is simply an amazing piece of craftmanship. Well done, and SO CLOSE!

Thread Information

Users Browsing this Thread

There are currently 6 users browsing this thread. (0 members and 6 guests)

Similar Threads

  1. Legendary Dub Parker's B Looper found!
    By Original Looper 1 in forum Outboard Racing History
    Replies: 5
    Last Post: 07-07-2010, 05:54 AM
  2. Wanted to Buy: Quincy Looper parts
    By Bob Dunlap in forum Parts and Accessories
    Replies: 2
    Last Post: 06-04-2008, 02:53 PM
  3. Quincy Looper Pictures and Collections
    By Original Looper 1 in forum Outboard Racing History
    Replies: 71
    Last Post: 01-21-2008, 04:26 PM
  4. Waldman F 44 Looper has been found!
    By Original Looper 1 in forum Outboard Racing History
    Replies: 26
    Last Post: 06-18-2007, 09:55 AM
  5. Quincy's 90 ci King Looper Beast
    By Original Looper 1 in forum Outboard Racing History
    Replies: 1
    Last Post: 04-06-2007, 07:08 AM

Bookmarks

Posting Permissions

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