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noob head machining question

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Old Mar 31, 2009 | 06:44 PM
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Default noob head machining question
when you have your heads milled do you have to have your intake milled to compensate for the milled heads?
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Old Mar 31, 2009 | 08:51 PM
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I know if you mill a large amount then it will affect the IM bolting up but I don't know just how much really matters. I'm curious what people say here as well since I'm about to mill some heads from 66 down to 62cc chambers.
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Old Mar 31, 2009 | 09:03 PM
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will i need shorter pushrods? i have TSP 7.4's would i need like 7.375?
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Old Mar 31, 2009 | 10:04 PM
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You have to mill the deck surface as well as the intake surface on the cylinder head. You don't have to mill the intake itself. The machine shop should know that though.
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Old Mar 31, 2009 | 10:17 PM
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4cc is probably about .028", I don't think that's an issue. I had my 5.3L heads milled .022 no problem. I think you run into trouble at like .040".
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Old Mar 31, 2009 | 10:18 PM
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how much would i have to mill my heads to get to 10:1 compression?
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Old Apr 1, 2009 | 04:50 AM
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I have milled .035 from heads without having problems bolting up the intake, but you will need new pushrods.
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Old Apr 1, 2009 | 08:02 AM
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Push rods are the only things I ever had to change with milling.
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Old Apr 1, 2009 | 06:33 PM
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Im on the same boat i got my 706's milled .030 and i was wondering if i needed shorter pushrods and what my compression would be.
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