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Thread: It got a leg out of bed!!!!!!

  1. #1
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    It got a leg out of bed!!!!!!

    I thought some of you engine builders might like to see what happens to a 36 degree turbo Offy when a rod goes for a walk.liknwal 089.jpg

    Expensive day at the track!
    URSUSMAJOR

  2. #2
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    Quote Originally Posted by Bigbjorn View Post
    I thought some of you engine builders might like to see what happens to a 36 degree turbo Offy when a rod goes for a walk.liknwal 089.jpg

    Expensive day at the track!
    Did it go through the muffler guard or some such?

    Not being funny, doesn't look like a block............... just interested.

    DL

  3. #3
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    I'll bet a few "Oh bother"s were uttered.
    If you don't like trucks, stop buying stuff.
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  4. #4
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    Quote Originally Posted by 350RRC View Post
    Did it go through the muffler guard or some such?

    Not being funny, doesn't look like a block............... just interested.

    DL
    That is the sideplate that bolts on the cylinder case. The top part is the crankcase breather. The rod has already been through the block.
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  5. #5
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    Quote Originally Posted by V8Ian View Post
    I'll bet a few "Oh bother"s were uttered.
    Perhaps in circuit racing by English gentlemen, Ian. Speedway crew chiefs were more likely to let out a few GDMF's and belt the driver around the head with blunt objects.

    Smoky Yunick once took to Joe Hunt with a faulty magneto.
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  6. #6
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    Quote Originally Posted by 350RRC View Post
    Did it go through the muffler guard or some such?

    Not being funny, doesn't look like a block............... just interested.

    DL
    This is an Offy block.liknwal 079.jpgThe sideplate bolts on the side with all the studholes.liknwal 080.jpgAnother block. Note the damage to combustion chamber on No.1.liknwal 081.jpg
    URSUSMAJOR

  7. #7
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    Sorry to mislead you. I got a bit ahead of myself. The bit with the hole in it is the breather chest that bolts to the side of the crankcase. It is not the water jacket plate that bolts to the open side of the cylinder case. Here are some photos of an Offy crankcase. It is for a 159 c.i. 19 degree turbo Drake-Offy. As pictured it is smoking hot and the main bearing webs are being pulled in for a trial fit. They were removed and .0035" turned off then anodised. When the crankcase is smoking hot the webs should be a light press fit in the crankcase bore. The engine builder told me he got the case as a raw casting from John Drake early 2000's and believes it is the last case cast for Drake Engineering. The pictures were taken at Ken Walton's shop near Kansas City where the case was machined.DSC_0001.jpgDSC_0003.jpgDSC_0005.jpg
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  8. #8
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    Here is another one that made a loud noise. It is a purpose built race engine from the 1920's. SOHC & long stroke. I don't know the maker's name. The engine is displayed in the Museum of American Speed, Lincoln, Nebraska. Right next door to the huge Speedway Motors shop and warehouse.liknwal 068.jpg
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  9. #9
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    Interesting look engine - looks like steel cylinders with an alloy waterjacket - Can you imagine stopping that leaking?
    John

    JDNSW
    1986 110 County 3.9 diesel
    1970 2a 109 2.25 petrol

  10. #10
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    Quote Originally Posted by JDNSW View Post
    Interesting look engine - looks like steel cylinders with an alloy waterjacket - Can you imagine stopping that leaking?
    John, it looks to me like it was copied around aero engine practice of WW1 & 1920's.
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