Re: AMC Pistons; Forged have downsides too , Cast has advantages ...

["piper_pa20" <piper_pa20@xxxxxxxxxxx>]

I still don't have the street address or phone number to call the people for 
the truck.

I'm checking.

Joe
----- Original Message ----- 
From: <farna@xxxxxxx>
To: <mail@xxxxxxxxxxxx>
Sent: Friday, September 24, 2004 8:34 AM
Subject: Re: AMC Pistons; Forged have downsides too , Cast has advantages 
...


> Andrew, those cranks were still CAST steel, not forged though. Forged 
> retains a lot more strength due to hammering the grain structure of the 
> steel more densely.
>
>
> On September 24, 2004 andrew hay wrote:
>
> > that's the way it is -now-, but i don't think it was always true.  in
> > particular, i think it was some development in mass production casting
> > that made iron cranks practical in the '60s.  remember, molten steel
> > is much more 'runny' than iron.  that would make casting an odd shape
> > like a crank much easier.
> >
> > blocks are easier; you can make a block plenty heavy to cope with
> > less-than-perfect casting.  you can't make a crank heavier; the stress
> > would get -worse-.
> >
> > mopar wouldn't have designed their famous slant six with a steel
> > crank if they didn't have to - and they spent the money to convert it
> > to cast in the '70s, which involved bigger main journals.  and the
> > chevy 194 and 230 had a steel crank but the 250 didn't.
> > ________________________________________________________________________
> > Andrew Hay                                  the genius nature
> > internet rambler                            is to see what all have seen
> >
> > adh@xxxxxxxxxxxxxxxxx                       and think what none thought
>
>
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