As I understand it, the reason the big port head has big ports is
that they ran a ball mill into the ports - basically a factory chamfer.
- Tony Drews
At 03:41 PM 7/5/2006, Bill Babcock wrote:
>Oddly enough, it might work pretty well to just chamfer the edge. Do
>the usual machinist's blue method to find the manifold outlines,
>score them so they won't rub off, and then just match them up fwith a
>little ramp.
>On Jul 4, 2006, at 5:45 PM, Tim Murphy wrote:
>
>>To make a long story short, I didn't check closely enough before I
>>had the
>>machine shop work done on a cylinder head and now realize I have
>>1.5 inch
>>intake ports on the head and 1.625 inch ports on the manifold. The
>>head is
>>for a vintage race car, 1961 TR-4.
>>
>>Question: Is there enough stock in the head to allow me to bore
>>the head
>>intake ports out to 1.625 (1/16 th on a side) for a depth of about
>>1/4 inch
>>and then smoothing out the step with a die grinder? I just want to
>>get rid of
>>that abrupt 1/16 th inch step. Will probably wind up using the
>>head on a
>>Stromberg street car engine on my son's car in the future.
>>
>>Next head that we do will definitely be a 1.625 (S.U.) head for the
>>race
>>car!!
>>
>>Thanks in advance,
>>Tim Murphy
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