James,
correct me if I am wrong, but I believe that you only have to pre-heat cast
iron to weld it.
The CNC marks I saw in sprint-car heads were rather rough (guessing
eighth-inch high ridges).
Matt
> From: "James J." <m1garand@speakeasy.net>
> Date: Thu, 18 Dec 2003 01:28:39 -0500
> To: The Junkers <junkman923@earthlink.net>
> Cc: mgb-v8@autox.team.net
> Subject: Re: Looking for a lonely 300 head
>
> Matt,
> I suspect that I could buy another set of heads for the price of
> having a good shop pre-heat and re-surface the chamber, though maybe
> not. I'll look into it if I've already removed too much material. I
> think CNC marks aren't deep enough to create hot-spots, but that's just
> a guess. CNC marks are definitely smaller than the pits I had.
> Thanks for the thoughts.
> James J.
>
> The Junkers wrote:
>
>> James, did you ever think of filling the pits at a weld shop?
>>
>> Also, as I recall, newer race heads prepared by Weld's CNC machines are
>> delivered and usually run with rough machine marks still in the combustion
>> chambers.
>>
>> It's my recollection that the smoothing wasn't worth the extra expense
>> according to the company.
>>
>> Matt
>> (62 Skylark in the garage thinking of a heart transplant to a willing MGB)
>>
>> on 12/17/03 10:49 PM, James J. at m1garand@speakeasy.net wrote:
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