1600 vs. 1750 question

[AlfaNeely@domain.elided]

In a message dated 11/14/2002 11:36:04 PM Central Standard Time, 
owner-alfa-digest@domain.elided writes:


> Date: Thu, 14 Nov 2002 20:56:56 -0600
> From: "Bob McKeown" <mcneon@domain.elided>
> Subject: 1600 vs. 1750 question
> 
> I'm going to put a 1750 in my Duetto. All the US 1750s, of course, were
> injected, and my car is carbureted. I'd really like to use a 1600 front
> cover and crank pulley so I don't have to look at that empty injector pump
> mount on the engine.
> 
> Can anyone tell me if the 1600 and 1750 front covers are the same height?
> And, if so, will the 1750 crank work with the 1600 front cover (length, seal
> location, etc.)? Any other issues I'll have to deal with?
> 
> Bob McKeown
> Nashville
> 

       The 1750 block is taller due to the added stroke.  A bit of welding of 
oil passages and milling on the Spica front cover and you should be able to 
make it look like the 1600 front cover.  Finding a European 1750 front cover 
might be hard.
       The crankshaft snouts are all the same as far as I can tell.  The 1300 
and 1600 crankshaft pulley / harmonic balancer is smaller diameter than the 
1750 & 2000.  The early pulleys will under drive the water pump and 
alternator.  As a racer, you should be familiar with underdrive pulleys and 
be able to select the proper pulley for your requirements.
       For what it is worth, the 1750 has a larger pulley on the alternator 
than the later 2000.  I guess the later Alfas with air conditioning and other 
electrical requirements used a smaller pulley to turn the alternator faster 
and put out more current.

Ciao,
Russ Neely
Oklahoma City
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