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14044862 aluminum heads?!? Are they to much for street application?!?

General engine tech -- Drag Racing to Circle Track

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bmyers1927
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14044862 aluminum heads?!? Are they to much for street application?!?

Post by bmyers1927 » Thu Sep 12, 2019 2:08 pm


    mag2555
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    Re: 14044862 aluminum heads?!? Are they to much for street application?!?

    Post by mag2555 » Fri Sep 13, 2019 6:32 am

    are you sure about that casting number?

    mag2555
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    Re: 14044862 aluminum heads?!? Are they to much for street application?!?

    Post by mag2555 » Fri Sep 13, 2019 7:18 am

    So it seems the 861 and 862 casting are large port Bow tie heads and can only be used on the mark 4 and 5 blocks.

    Aside from that there 380 cc runner volume would call for having atleast 556 cid under them for a street usage and in a light car and with 3.90 gears out in back to make good use of that big port volume.

    In other words if your not planing to build a big cid 750+ hp motor then heads with under 320 CCs will serve you far better and you can still make well over 600 hp on pump fuel!

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    Dave Koehler
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    Re: 14044862 aluminum heads?!? Are they to much for street application?!?

    Post by Dave Koehler » Fri Sep 13, 2019 8:50 am

    Curious to see if this first post is a real person or a robot troll.
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    MadBill
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    Re: 14044862 aluminum heads?!? Are they to much for street application?!?

    Post by MadBill » Fri Sep 13, 2019 10:30 pm

    Looks suspicious certainly, but would anyone be trolling to shill factory GM parts?
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    Happy is he who can discover the cause of things.

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