RE: Cams for 1600

[Hirsch <Catenary@xxxxxxxxxxxxxx>]

George Nunez wrote:
> I recently got a new set of cams for my Giulia TI (its had a
> 1600 Duetto engine in since 1975) that, I was told, are the
> repacement p/n for the old 10548 03200 01.

> This new p/n from Alfa is 607-02056, when I opened the box
> there are 2 exhaust cams, no p/n stamped, just a letter S
> (scarico) one of them. Well, thats ok because the cams are
> the same except for one thing. Problem is the little vee
> notch used for setting the timing on the intake cam is
> now on the bottom.

> Any advise would be helpful. I really just wanted to drop
> them in, now it looks like I`ll have to degree them. How
> about lobe centers ?

> Also anybody tried 10548 cams on a 1600. Its had the stock
> 10502 03200 01 for all these years but I wanted to try a
> bit hotter ones, 10.1 vs 9.5 mm lift and 4 or 5 degrees
> more duration.

I was surprised to find a pair of the 10548 03200 01 cams
in the recently purchased '66 1600 GTV (aka the Catdaddy car).

(The 10548 03200 01 cams are also known as 2L Euro cams.)
These cams seemed to work very well during the time the car
was driven. (The car has since been taken off the road for
restoration.)

My cams had two timing marks per cam placed 180 deg from
each other, so timing was easy. In your case I don't see
why you couldn't just time the exhaust cam in the normal way,
i.e., with both cam lobes pointing outwards and time the
intake cam by rotating the engine 360 deg so both cam
lobes point inwards.

One odd thing that may or may not be generally true is that
to fit the 2L cams into a 1600 engine some of the valve shims
may need to be ground down to give the proper valve clearance.
May of the shims needed are 1.45mm and the commericial shims
range from 1.50mm to 3.5mm.

(from Alfa Ricambi catalog)
Cam P/N             Application  Lift       Duration  Lobe centers  Perf
rank
10502 0320000  1600               9.1mm  219          114                =
  =

   2
10502 0320001  1600, 1750    9.5         226          102                =
  =

   4
10548 0320001  1750, 2000    10.1      230           99.5                =
  =

 5

Rich Hirsch
'87 Milano
'78 Spider
'67 Duetto
'66 Sprint GTV <- my Catdaddy car
Editor, i Saluti, St Louis AROC
Website: http://www.catenary.com/victor/isaluti

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