'93 cobra gt-40 chamber cc?

Discussion in 'Fox 5.0 Mustang Tech' started by JARED FOURNIER, Dec 7, 2003.

  1. JARED FOURNIER

    JARED FOURNIER
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    I've got an '89 5.0 block .30 over, with Probe forged flat-tops with the double valve reliefs(for possible latter swap to tfs heads), and gt-40 heads off of an '93 cobra motor. I'm trying to approximate my compression ratio, but I've read many contradicting chamber specs., everything from 60cc to 65cc. What's the straight dope? I'd like a ratio in the middle 9 to 1 range. Do I need to have these heads milled? Does any one know what the chamber volume of these heads is? The engine is on the stand, so now is the time if I need to get them milled. Thanks.
     
  2. ponycar17

    ponycar17
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    I've heard 65cc for the GT-40 heads...
     
  3. 1Quik85GT

    1Quik85GT
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    Those heads are 65CC I would mill them to get the cc lower...more compression..
     
  4. mike keirstead

    mike keirstead
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    the ones i bought were cc'd at 62 and they are untouched...