[franco-veloce]

Hi All,



partnumbers for 2600 cams in my catalog are:

10600032001 for berlina/sedan

106010330100 for spider and sprint

in my 2600 spider engine is number cast on cams :

10601032000

What I also see in the instructionbook is that the berlina cams have more opening time very strange because the berlina has less power then the spider and sprint but I cannot find any specs about the cam lift.

someone told me some years ago that he put the berlina cams in his 2600sprint he owned in the 70 ties and got more power !!!


Can any explain ?

rgds Franco

 

[tubut]

Franco, some of the number you posted are abbreviated and incorrect (1 digit missing).

The single-volume parts catalog Pub. 992 and the first volume of the two-volume parts catalog list different numbers for Sprint/Spider cam shafts:

106.00.03.200.01 - Berlina (both manuals)
106.01.03.301.00 - Sprint/Spider (Pub. 992 - single volume manual)
106.01.03.200.00 - Sprint/Spider/2600 SZ (Pub. 1147 and 1167)

I never looked at casting numbers, but this may explain the number you have in your car.

The list of competition options (by Alfa Romeo USA) does not list any cam shaft options for 106 engines (just Weber setup, front springs and gearbox options).

As for the Berlina cams having more opening time, this may be a result of the Berlina engine having less compression (9:1 on Berlina vs. 9.5:1 on Sprint/Spider) using the same bore and stroke, which means more room in the combustion chamber and therefore valves can open earlier and close later (relative to crankshaft angle) without hitting the pistons. If Berlina cams were to be used on a Sprint/Spider head, I would suggest to have a very close look at these clearances.

 

[franco-veloce]

Hi Ruedi,
thnkxs for info

do someone know the difference between

106.01.03.301.00 - Sprint/Spider (Pub. 992 - single volume manual)
106.01.03.200.00 - Sprint/Spider/2600 SZ (Pub. 1147 and 1167)

FYI

I changed my inlet camshaft timing with the number 106.01.03.200.00 7 degrees more advanced with my 45DCOE weber set no problems with hitting the pistons.

it gives engine more power and better response !!!

rgds Franco