Alfa Romeo Forums banner

1 - 13 of 13 Posts

·
Registered
Joined
·
11 Posts
Discussion Starter #1
Hello guys!

I've just got myself a set of cams, and the former owner said to me that they might be genuine GTA cams of some sort.. Other than that, I don't know anything about them.

They have just the normal 032000 number on them. But they are clearly not a standard 1600 cam. Lift is about 10 mm. and there seems to be quite some overlap. I will try to post some pictures when I get them on friday!

Can anybody tell me what number a genuine GTA cam should have?

Best regards
Ola from norway.
 

·
Registered
Joined
·
2,200 Posts
The stradale cam is just a normal 9.7mm 1600 cam. Either 10mm 300 degree or 10.5 300 degree was common Autodelta fitment. The numbers are not necessarily on the cam and they are ground on a stock core with the numbers you describe. They rev really nice but are weak on low down torque.
 

·
Registered
Joined
·
11 Posts
Discussion Starter #3
Thank you for your knowledge! :)

So they might be the 10 mm autodelta 300 degree then! I will post some pictures tomorrow! Maybe you expert guys can see if they look right.
 

·
Registered
Joined
·
1,637 Posts
Partnumber for the Stradale GTA camshaft

Hello Veglia Borletti,

The partnumber for the Stradale GTA camshaft is 105.02.03.200.01 (from the Giulia Sprint GT). This is according to the partsmanual of december 1967 in publication Diass - Pubbblic. N. 1314 12/67 (1000). This is the same camshaft as for the GT, GTC and GTV.

Optional (Sonderwunsch) for the GT, GTC and GTV are:
- 101.21.03.200.00 veloce with 9.5 lift
- 101.21.03.200.01 racing with 10.0 lift (both from the Giulia Sprint Speciale). These options were not noted for the GTA in the partsmanual.

The Alfa Romeo Performance Options Catalogue discribes another option for the GTA: 105.32.03.200.99 with 10.5 lift (Autodelta).

I am curious as to other optional camshafts and their partnumbers!

Ciao, Olaf
 

·
Registered
Joined
·
11 Posts
Discussion Starter #5 (Edited)
Thank you! Im a bit confused, both because of my bad english, and about the numbers! ;)

As a wrote earlier, this cams just have the usual 032000 number on them. But they are clearly not normal. Lets hope the pictures will help. Should be able to post them here later this day.

Maybe they are not the real deal at all, but it would be interesting to find out. The former owner has always claimed that it was genuine GTA cams. They once came from sweeden, and alfa Rossos Rune Dalbeck. The cams was used in his Junior Zagato.

:)
 

·
Registered
Joined
·
11 Posts
Discussion Starter #6
Here are some pictures:

So, what do you guys think? GTA or not GTA? :rolleyes:

The cam lobes are quite "edgy", but they don't look worn out, and they are all the same.
:)








 

·
Registered
Joined
·
197 Posts
Those could well be cams that came from Autodelta. I have seen a 1600 single plug Autodelta prepared head with cams that looked similar to those (only numbers on the being 03200).
 

·
Richard Jemison
Joined
·
7,220 Posts
Cam profiles

You will have to measure BCs & lift to determine what you have.
Below are Cam Doctor specs of offerings in the ~60s/~70s from Alfa/Autodelta.

Cam Profile #101210320001 New(NOS) 10121 cams profiled Feb. 2009
#101210320001
cam lift .414
.010 345°/
.020 297°/
.040 274°/
.050 265°/
.080 246°/
.100 235°/
.150 235°/
.200 187°/
.250 164°/
.300 136°/
.350 101°/
.400 045°/
.41295maxlift

10.6mm Autodelta Reduced “Billet” Ausca (fast ramp)GTAm
Lift .418 (10.6mm) Base Cr. 1.030 (26mm ) .445 (11.32 mm) Lift Base Cr..980
.010 338 330
.020 296 258
.040 272 247
.050 265 235
.100 237 210
.150 215 199
.200 191 179
.300 136 165
.400 57 72
.410 16 61
.420 (max.418) 46
.440 6
50-70-70-50 22-40-40-22
 

·
Registered
Joined
·
187 Posts
The cams on the right in the photo I've been told are for a 1600 GTA. They look similar to the ones in your photo. I bought them from the Alfa importer here in Indonesia after they closed in the 80s. Very long duration, no markings except '11' stamped on the end of each. They are NOS and clearly unused but not so well stored. I have one pair, for sale if you need them ?
 

Attachments

·
Registered
Joined
·
55 Posts
The cams on the right in the photo I've been told are for a 1600 GTA. They look similar to the ones in your photo. I bought them from the Alfa importer here in Indonesia after they closed in the 80s. Very long duration, no markings except '11' stamped on the end of each. They are NOS and clearly unused but not so well stored. I have one pair, for sale if you need them ?
Still for sale. Thanks
 

·
Richard Jemison
Joined
·
7,220 Posts
The cam on the right with rusty bearing surfaces can`t even be used as a core. To use Gordon Raymond`s term it`s best used as a "Tomato Stake".
 

·
Registered
Joined
·
55 Posts
The cams on the right in the photo I've been told are for a 1600 GTA. They look similar to the ones in your photo. I bought them from the Alfa importer here in Indonesia after they closed in the 80s. Very long duration, no markings except '11' stamped on the end of each. They are NOS and clearly unused but not so well stored. I have one pair, for sale if you need them ?
I will buy them if still for sale. Cheers
 
1 - 13 of 13 Posts
Top