101210320001 GTA cam? - Alfa Romeo Bulletin Board & Forums
 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 08-27-2008, 07:00 PM Thread Starter
Registered User
Platinum Subscriber
 
Andrew's Avatar
 
Join Date: Mar 2004
Location: Berkeley, CA
Posts: 20,809
101210320001 GTA cam?

I've been offered a pair of 101210320001 cams, described by the seller as GTA cams. I see them mentioned in another post today in an SA GTA.

My GTV/C/A parts book shows for GTA: 105020320001 as standard, 101210320000 as optional, and these, 101210320001 as "Export to USA" for GT, GTC, and GTV, but not GTA.

I have a pair of 1600 Veloce cams already, 101210320000; how do the 01 cams differ from the 00 cams?

Thanks for any info.

Andrew
Andrew is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 08-28-2008, 09:35 AM
Richard Jemison
Platinum Subscriber
 
Alfar7's Avatar
 
Join Date: Apr 2005
Location: Pensacola, Fl. U.S.A.
Posts: 6,973
Old Cams

The 10121.03.200.01 are 10mm lift cams. Commonly refered to as the 10MM Race cams of the `60s & `70`s. It`s duration was 265 at .050 lift. Fitted to everything with single plug as a pure race cam. High RPM cam only.

The 10121.03.200.00 are 9.6mm lift cams. This is the " Veloce or TI Super Cam". It came in typo 105.18, 105.11 and 101.18 cars. Duration of 245 at
.050 lift.

The 10502.03.200.01 cam was the normal fitment to all production 1600 motors regardless of chassis. It is pretty useless as are all of the early cams due to too much early duration bleeding off power & torque.
Slow ramps were a necessity to negate dealer service during the warranty period.

Don`t buy the cams thinking they will give you a power boost. They are antiques!
Rj

Richard Jemison
RJR Racing

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

"When you are dead you don`t know it.
Only those around you are distressed.
Same with stupid"
Alfar7 is offline  
post #3 of 5 (permalink) Old 08-28-2008, 09:38 AM Thread Starter
Registered User
Platinum Subscriber
 
Andrew's Avatar
 
Join Date: Mar 2004
Location: Berkeley, CA
Posts: 20,809
Thanks very much Richard. Yes, I figured they were probably an outdated design compared to what can be done now.

Andrew
Andrew is offline  
Sponsored Links
Advertisement
 
post #4 of 5 (permalink) Old 08-28-2008, 11:15 AM
Moderator
Platinum SubscriberSuper Moderator
 
Gordon Raymond's Avatar
 
Join Date: Jul 2006
Location: Northfield, Illinois
Posts: 11,040
Hi Andrew,
Having run all the old competition cams, 10121.03.200.01 "Racing 1600 single plug" and 10532.03.200.99 "Racing GTA's only" in both single plug and my GTA engine, I totally agree with Richard's analysis. Neither of these cams provides any low end torque in either engine below 3500 rpm. I completely gave up on the "Racing GTA only" cam when I discovered that even with 11.5 compression and an 80 mm bore my GTA engine only had a very narrow power band, from 4500 (on a good day) to 7500. I switched to the "10 mm" single plug cams, kinder to the big heavy GTA valves, and did not loose much power on a dyno even with a drop in compression to 10.7 and bore reduction to 79 mm. The low end torque appeared at 3500, and the action was over at 72-7400 rpm.
Since, I have listened closely to RJ and had him teach me a little about cam design an what works in these old motors. I now have two (.5) sets of Alfar7, Richard Jemison, designed cams from WebCam, for my Ausca single plug and GTA engines.
I've been doing this a while now, but am not just an old dog. I like new tricks. Listen to his advice. Give him some engine specifics and have him advise you what will work best. He IS the "CAMMASTER" and now has an honorary Engineering Degree as well!


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Gordon Raymond
Illinois SNO Alfa Chapter Director
Illinois SNO Ferrari Chapter Director
and sometimes, CONFUSED AND INCORRECT, but Larry helps me out.
Now:
Illinois Chapter Director AND Charter Member of THE CONFUSED AND INCORRECT
Gordon Raymond is online now  
post #5 of 5 (permalink) Old 08-29-2008, 01:46 PM
Registered User
 
Join Date: Sep 2005
Posts: 372
camshafts

Hello all,

I would appreciate if you could read my post under thread 'GTA cams part # 10532.03.200.99' and possibly help.
South Africa is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Alfa Romeo Bulletin Board & Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome