Milling an aluminum intake........

Small Block Mopar Engine

  1. seabee

    seabee FABO Gold Member FABO Gold Member

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    Any advice on milling an aluminum intake (Edelbrock Performer). The heads got milled and now the bolts won't line up. Is there a certain way to measure it?
     
  2. YY1

    YY1 Well-Known Member

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    There's a formula...look on the B body side (or google).

    For every x thousanths off the deck take y off the intake.
     
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    • 340sFastback

      340sFastback Well-Known Member

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      Try and install it with no gaskets and see if it fits correctly. If so then get it milled the thickness of the gaskets. If you look around over on summitracing.com there are a lot of different thickness intake gaskets out there.
       
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      • longarm

        longarm Car sold back to original owners

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        • seabee

          seabee FABO Gold Member FABO Gold Member

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          Thanks for the help guys!
           
        • seabee

          seabee FABO Gold Member FABO Gold Member

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          For archive purposes

          Chrysler LA engines:

          Face Angle -3°

          Intake Cut .0095”

          so remove .0095” for each .010 removed from heads.

          "Where the face angle rakes in (less than 45 from vertical when assembled on the motor), the angle is negative, such as Chrysler LA, etc. Remember: subtracting a negative number makes it a positive number!
          Multiply the result of the calculation by the head gasket mill distance to get the amount to be taken off the intake flange surface for proper manifold alignment. In some motors (especially those with integral valley covers), additional compensation must be made for end seals, etc.
          A positive example: RB (413, 440) face angle is 10° positive.
          .707 ÷ SIN(35) = .707 ÷ .5736 = 1.2326, so remove .0123” for each .010”.
          A negative example: LA (340, 360) face angle is 3° negative.
          .707 ÷ SIN(48) = .707 ÷ .7431 = .9514, so remove .0095” for each .010”. "
          -http://victorylibrary.com/mopar/intake-mill-c.htm
           
        • BigWhip

          BigWhip New to Mopar land

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          Great Post !
           
        • C130 Chief

          C130 Chief Mechanical Genius

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          Go to the machine shop and demand your money back. If they cut the deck surface without also cutting the manifold surface they did it wrong, plain and simple.
           
        • RustyRatRod

          RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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          We should have a tech section for stuff like this. We got more members than most sites that do have stuff like that yet we don't.
           
        • Woodie

          Woodie Take-off EH!

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          In some cases you can file the bolt holes with a round file if it is very close. use a thinner gasket I have done this with good results.
           
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