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Std 2lt Pinto Head Combustion chamber CC

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2lt_Scort
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2014/09/14 21:42:38 (permalink)
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Std 2lt Pinto Head Combustion chamber CC

Hi,
 
Does anyone have a reliable CC measurement for a stock 2lt cylinder head combustion chamber assuming virgin with no skimming/resurfacing?
 
Thanks,
Rhys

Mk2 2dr 2lt EFI quad T/B's
Mk2 2dr Track Car project
Mk1 2dr
Mk2 2dr 2lt (Sold)
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    PeterM
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    Re: Std 2lt Pinto Head Combustion chamber CC 2014/09/15 07:57:28 (permalink)
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    The low km heads I have worked on in the early '80's with little wear and standard valves and no resurfacing average 47.3cc.
    Allow a small variation between each combustion chamber on a particular head; and also variations between heads.
     
    If you are cc'ing the entire system:
    Ring Landing: 1cc
    Felpro Gasket (1.5mm thick, 92.5mm diameter): 10.1cc
    Deck to Piston at top of stroke (0.6mm): 3.9cc
     
     
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    2lt_Scort
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    Re: Std 2lt Pinto Head Combustion chamber CC 2014/09/15 08:34:03 (permalink)
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    Thanks Peter.
     
     

    Mk2 2dr 2lt EFI quad T/B's
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    Mk1 2dr
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    Flighter
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    Re: Std 2lt Pinto Head Combustion chamber CC 2014/09/15 21:59:28 (permalink)
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    Everything I've read states that Felpro head gaskets are actually 1.0 mm compressed.  I mention this because 0.5mm can make a big difference to the final compression ratio.

    WTB: Recaro seat - any condition considered
     
     
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    2lt_Scort
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    Re: Std 2lt Pinto Head Combustion chamber CC 2014/09/16 07:41:32 (permalink)
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    Hi Flighter, yes that would about right as its looks to be about 1.3 uncompressed. 
     
    My head comes in at 40ccs. Had to have pistons dished and will run a thicker Cometic h/gasket to get comp ratio back to 9:1
     
    Rhys
     
     

    Mk2 2dr 2lt EFI quad T/B's
    Mk2 2dr Track Car project
    Mk1 2dr
    Mk2 2dr 2lt (Sold)
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    PeterM
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    Re: Std 2lt Pinto Head Combustion chamber CC 2014/09/17 19:26:49 (permalink)
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    You are correct.
    I rechecked my old notes and measured a used 2 litre gasket (not Felpro) across the fire ring came up at 1.1mm thick.
    Apologies for my silliness.
    #6

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