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Thread: 1500 pre crossflow head questions

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    Spanner Monkey

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    1500 pre crossflow head questions

    OK guys I've got a new old stock ford 1500 pre crossflow cylinder head still in the box (not GT). It's marked up as a low compression version (L).
    Anybody know what the difference between the low and High compression (H) cylinder head.
    Also I'm trying to get some valves for it. Now looking in my Cortina book it shows a standard 1500 inlet valve is bigger than the GT valve. Can this be correct? Anybody be able to give me a definite answer I would be very grateful. Thanks Paul

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    Racer Decade Plus User Forest_rallying's Avatar

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    Re: 1500 pre crossflow head questions

    Contact Throbnozle Racing,they specialise in pre X flow Racing engines.

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    Re: 1500 pre crossflow head questions

    GT valves were bigger
    i think but cant be sure that the low comp head was thicker than hc

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    Re: 1500 pre crossflow head questions

    Quote Originally Posted by Graham View Post
    GT valves were bigger
    1500gt valves were smaller

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    Re: 1500 pre crossflow head questions

    Quote Originally Posted by Graham View Post
    GT valves were bigger
    1500gt valves were smaller

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    Re: 1500 pre crossflow head questions

    If I say it twice does it make it more believable? Not sure what happened there! :0

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    Spanner Monkey

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    Re: 1500 pre crossflow head questions

    GT inlets are smaller. GT Exhausts are Bigger

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    Re: 1500 pre crossflow head questions

    According to Tuning four cylinder Fords book by Paul Davies the valve sizes are 1.43 inlet, 1.18 exhaust for std 1500 pre X flow and 1.410 in, 1.245 ex for the 1500 Gt engine. The same valves are fitted to the 1300 pre x flow as the std 1500 five bearing crank engines. The smaller capacity 3 bearing engines were fitted with 1.27 in and 1.18 ex valves.

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    Spanner Monkey

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    Re: 1500 pre crossflow head questions

    I have a 116E 6050 J 1500GT head in the US if anyone is interested, please PM me.
    James

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