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Thread: Can heads be too Big

  1. #1
    Member JOURNEYMAN
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    Can heads be too Big

    This was just an information Question. Some of the Head manufactors
    web site quote compression ratios for there heads . Lets say 632 cu
    10-1 compression 714-750 cam shaft soild roller. cam 360 head or bigger be too much.

  2. #2
    Senior Member RACING JUNKIE
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    yes heads can be too big....helmets only come in so many sizes.

  3. #3
    Senior Member RACING JUNKIE
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    Re: Can heads be too Big

    Quote Originally Posted by blaserman
    This was just an information Question. Some of the Head manufactors
    web site quote compression ratios for there heads . Lets say 632 cu
    10-1 compression 714-750 cam shaft soild roller. cam 360 head or bigger be too much.
    I'd tell you that head is perfect :lol:

    Really thought many disagree with me but myself and a few locals keep going back to a huge head on smaller motors and they just down right fly ! I've now did this 2 times 548 with dart 410's and 468 with dart 355's, a good friend of mine put dart 360's on his 496 all 3 motors really ran good better then anything around here with the same size motor and smaller head.
    David Lanning
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  4. #4
    Senior Member EXPERT BUILDER
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    That being said,the carb and cam have to work together also.

    Did you guys have to try different carbs and cams with the low compression,big heads and big cubes to make things work together :?: Was there a fine point(small window) for the carb and cam :?:
    If a 5 lb hammer can't fix it,it must be electrical
    Keep the shiney side up! 8)
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  5. #5
    Senior Member RACING JUNKIE
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    Quote Originally Posted by Tod74
    yes heads can be too big....helmets only come in so many sizes.
    :lol: :lol: :lol: Heads are never too big,it's the motor that is under them is just too small :wink:
    "The problem with quotes on the Internet is that you cannot confirm their validity"- Abraham Lincoln

  6. #6
    Senior Member RACING JUNKIE
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    Quote Originally Posted by nofear69
    That being said,the carb and cam have to work together also.

    Did you guys have to try different carbs and cams with the low compression,big heads and big cubes to make things work together :?: Was there a fine point(small window) for the carb and cam :?:
    we did not stuck a cam/carb that anyone would with the size motors would run

  7. #7
    Senior Member RACING JUNKIE
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    Quote Originally Posted by olds48
    Quote Originally Posted by Tod74
    yes heads can be too big....helmets only come in so many sizes.
    :lol: :lol: :lol: Heads are never too big,it's the motor that is under them is just too small :wink:
    I like how you think.

  8. #8
    Senior Member RACING JUNKIE
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    Quote Originally Posted by Tod74
    Quote Originally Posted by olds48
    Quote Originally Posted by Tod74
    yes heads can be too big....helmets only come in so many sizes.
    :lol: :lol: :lol: Heads are never too big,it's the motor that is under them is just too small :wink:
    I like how you think.
    "The problem with quotes on the Internet is that you cannot confirm their validity"- Abraham Lincoln


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