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Quick and easy way to *lower* compression?

Discussion in 'The Garage' started by Pookster, Nov 12, 2004.

  1. Pookster

    Pookster 1/2 ton status

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    if you were trying to lower the compression of an engine, can you use some kinda head gasket spacer? Just thinking that people deck a block to get better compression, thinking that it could be done in reverse?
     
  2. 84_Chevy_K10

    84_Chevy_K10 Banned

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    No. That will destroy your quench and give you worse detonation than you have now.

    A bigger cam or changing your cam timing is probably a better option.
     
  3. Pookster

    Pookster 1/2 ton status

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    its for a diesel. /forums/images/graemlins/wink.gif I want detonation!
     
  4. 84_Chevy_K10

    84_Chevy_K10 Banned

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    [ QUOTE ]
    its for a diesel. /forums/images/graemlins/wink.gif I want detonation!

    [/ QUOTE ]

    Oh, damn.

    I'd imagine it'd work...not sure that quench appies to Diesels.

    How about polishing those cylinder heads while they're off?
     
  5. Pookster

    Pookster 1/2 ton status

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    its just a thought- Since nobody seems to make low compression heads for the 6.2 diesel, why not just make a bolt on spacer, kinda like a TBI spacer.

    Im sure im missing something important, but... its just a thought...
     
  6. bablazer73

    bablazer73 1/2 ton status

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    ok, But why would you want to lower the compression?
     
  7. m j

    m j 1/2 ton status

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    for a turbo.

    you want the better pistons so spend the money for the 16:1 s
    deep dish makes more power then a flattop
    more surface area for the constant pressure
     
  8. diesel4me

    diesel4me 1 ton status Premium Member

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    I've heard of spacers and guys using double head gaskets,on gas motors--but never on a diesel!.I doubt if double gaskets would live on a diesel,especially with a turbo!. /forums/images/graemlins/crazy.gif
     
  9. rcamacho

    rcamacho 1/2 ton status

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    Diesel's typically run 20:1 CR even with a Turbo. If you really need to increase CR, go with a composition head gasket (thicker than steel or copper). If this is not enough than you'll need to swap pistions or heads.
     
  10. Pookster

    Pookster 1/2 ton status

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    thats only the older diesels or the NA diesels. I think the cummins, duramax and powerstroke are all now like 18:1 or lower.
     
  11. wasted wages

    wasted wages 3/4 ton status

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    If there is any meat to the combustion area of the cylinder head? You could remove material kinda like when they CC heads.
    Pistons could also be fly cut to remove material but at what expense IE: blowing a hole in the top of the piston.

    The engine would not produce much power down low till the boost came up,,maybe some web pages on tractor pullers might be a good place to look,,,those diesel powered pullers make some insane boost with 4 or more turbo's /forums/images/graemlins/yikes.gif /forums/images/graemlins/yikes.gif /forums/images/graemlins/yikes.gif /forums/images/graemlins/yikes.gif /forums/images/graemlins/yikes.gif /forums/images/graemlins/yikes.gif
     

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