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

[seabee]

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?

 

[YY1]

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

For every x thousanths off the deck take y off the intake.

 

[340sFastback]

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.

 

[longarm]

This article might help you.

http://victorylibrary.com/mopar/intake-mill-c.htm

http://victorylibrary.com/mopar/mopar-tech.htm

 

[seabee]

Thanks for the help guys!

 

[seabee]

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]

Great Post !

 

[C130 Chief]

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]

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]

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.

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.