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Thread: Building A looper Beast

  1. #11
    Team Member R Austin's Avatar
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    On the first trial run of heads, the core had 4 posts that met the plug side of the head to insure positioning of the core and would be welded shut with a plug. They are eliminated in the final head allowing the heads and all other cast parts to go straight to heat treat to bring them to T6 state. The following pics are of a head that I sacrificed to ensure core position and wall thickness around the combustion chamber.
    Attached Images Attached Images           

  2. #12
    Team Member R Austin's Avatar
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    On another head some combustion chamber machining to test the cutting tool. I will now build holding fixtures for the complete machining of another sacrificial head, after complete machining to drawings and a 21CC chamber. The next series will be drawing and pattern development of the mid case casting pattern.Name:  Head 122.jpg
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  3. #13
    Team Member R Austin's Avatar
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    Quote Originally Posted by R Austin View Post
    On another head some combustion chamber machining to test the cutting tool. I will now build holding fixtures for the complete machining of another sacrificial head, after complete machining to drawings and a 21CC chamber. The next series will be drawing and pattern development of the mid case casting pattern.Name:  Head 122.jpg
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    Attached are more pics of the roughing in of the cylinder heads. 1 end and 1 mid head.

    Also I have attached the drawings produced for making the mid case half. After the design of the part, the sand mold form needed to be created. This actually is harder than a cylinder block for the looper. I spent many hours creating this mold in the computer. Trying to keep my head around what I was looking at and how to get it to pull apart in the right places. Looks like a simple drawing, but not so.Name:  IMG-20120901-00623.jpg
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  4. #14
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    Just to cool!!!:d

  5. #15
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    Now we have TWO fascinating projects to look forward to on a daily basis! Life is good.

    But why go to all this work of building a looper while retaining the restrictive, stock Merc reed valve system? It appears that Tim's project and this one could be combined for a truly killer motor!

    Jeff

  6. #16
    Team Member Gene East's Avatar
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    Because the Looper design works even with the "restrictive" reed valve and because Dick Austin is a genius who enjoys doing things a little differently.

    I have nothing against Tim and his project. I would like to see the 2 motors face off on the water.

    My money would be on Dick!! Sorry Tim, hope you understand.

  7. #17
    Team Member BJuby's Avatar
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    If I had the expertise, know-how, tools, and time to do this, I would make the Looper exactly as it was put together, without a single improvement as well.

  8. #18
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    ..." I would like to see the 2 motors face off on the water.
    "

    Yeah! Love to see/ hear that happen.

    Jeff

  9. #19
    Team Member F-12's Avatar
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    I'll be there............
    Charley Bradley


  10. #20
    BoatRacingFacts VIP Aeroliner's Avatar
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    Default Looper vs Crossflow

    From past 4 cylinder four carb engines that both Tim and Doug Kay built I beleive that there is no way that a cross flow of equel cubic inches can match a the looper relative to pumping efficiency and HP per cubic inch. You can expect the crossflow to do about 2HP per cubic inch while the looper will approach 4 HP per cubic inch. Having a number of Quincy deflectors and loopers sitting here and having run some of them it might be fun to go further. One day after restoration we will run a Quincy D looper on gas along side our 4 carb 44 and see how the two stack up. Could also run a Quincy 40 with pads and the rest.

    Also just obtained a 40 Quincy looper block and I am looking for pistons, elbows and horns to put this engine back together.

    Alan

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