Correct me if I am wrong, but I think he means the outside of the AL head, not
the inside, a looks only effort.
I never thought of doing that to mine, but I am happy with it the way it is.
Keeping the polished AL valve cover shiney is more than enough fun for me! A
little oil drip just doesn't wipe off. Takes a bit of cleaning to get it all
off.
On Fri, 9 Jun 2000, Charles D. Sorkin wrote:
> Chris said:
>
> >I was always under the impression that a polished surface had less heat
> >transfer than a rough surface. The exterior of the head on our cars
> >doesn't do much heat dissipation to the air, but it does do >>some<<. I
> >don't know if the reduced heat dissipation is enough to be an issue, but
> >thought I'd mention it for discussion's sake.
>
> After reading the Vizard book about the A-series engine, it seemed that the
> underlying theme is that heat dissapation is accomplished only by coolant.
> The purpose of polishing is to diminish resistance to air flow. I got the
> impression that polishing in and of itself isn't as important as making sure
> that the intake and exhaust ports are perfetly matched. Also, routine
> decarbonization is critical to maintaining optimal flow rates.
>
> Regards,
>
> Charles
> '74 Midget
> '68 Sprite
> cdsorkin@ix.netcom.com
> Bloomfield, NJ
> "How about we duck inside for a Hen?"
>
>
>
>
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