Re: 1600 crankshafts

[bearbvd@domain.elided (Greg Hermann)]

At 9:32 PM 3/5/03, borrani@domain.elided wrote:

Steve,

All I know for sure is that 1600 --- 8-weight cranks were available in both
forged and billet for "racing" purposes. Could look the part numbers for
you if needed.

Nitriding a crank SOMETIMES produces a crack in it. The new, ion-plasma
nitriding process is by far the "safest" in this regard as well as with
regard to warping . Learned this from the "older fellas" at Moldex Tool,
who certainly should know of what they speak !

Greg

>Hey All,
>
>Some of you have heard my plea from other digests or personally, but it's time
>to spam this list for some info as well.
>
>A routine magnufluxing of my GTA's crankshaft shows an indication of a
>crack in
>the fillet (radius) of #3 rod journal, at a critical location.  The crack
>cannot be seen or felt, but that's what magnufluxing is for.
>
>The current crank is probably from a standard GTV, it has a single
>counterweight per throw.  I had it knife-edged, balanced, and nitrided.
>So sad.
>
>I am now looking to replace it, and I know that Autodelta used a double
>counterweight crank (looks just like a standard 1750 or 2000 crank) for their
>endurance motors.  My big question to this digest is, did Alfa upgrade the
>cranks they used in 1600 motors in Alfas produced in the '70's and '80's to
>double counterweights?  This is more of a question for our european digesti.
>
>This would be a natural choice to replace my ailing crank.  Anyone have good
>access to parts books that show this feature?
>
>Using a 1750 is illegal in my vintage racing organization.
>
>Thanks for all your help,
>
>Steve Schaeffer
>Seattle, WA
>'65 GTA
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