Weber Carb specs for Spider Jr.?

jrschwit · #1 (**permalink**) 12-09-2003, 07:43 PM

Hi,
I just installed a pair of 40 DCOE 28 carbs to replace the badly worn original Dellortos on a spider Jr. that I'm restoring. Can anyone point me to a source for a listing of the stock jetting for a DCOE in a 1300 engine. It runs much better than with the Dellortos but still not perfect. If I knew the "stock" jetting, I think I'd have a good place to start the tuning process.
Thanks,
Jim S

**spider4me** · #2 (**permalink**) 12-09-2003, 08:25 PM

In the Centerline catalogue toward the back is an excellent chart showing the correct jets, tubes etc for each model. Looks very comprehensive. Good Luck

**John M** · #3 (**permalink**) 12-09-2003, 09:44 PM

Welcome to the board Jim. Good catch Neil. I just got my centerline catalog and sure enough its got carb data.

So from the centerline catalog:

1300
105 Series
40 DCOE/28

Vent 28
Aux Vent 4.5
Main jets 112
Air Corrector 210
Emulsion f16
Idle 50 F11
Starting Jet 65 F5
Needle Valve 150
Accel pump jet 35
Accel pump bypass 60

Best Regards,
John M

jrschwit · #4 (**permalink**) 12-10-2003, 06:01 PM

Gentlemen,
Thanks for your help. I think I'm in good shape. Only difference to my jets from stock is 220 vs. 210 air corrector jet and 50 vs. 60 accel. pump bypass.
Jim S.

**Trav** · #5 (**permalink**) 12-15-2003, 08:39 AM

Does someone have a similar list for Dellorto's? I am curious if the 40's on my 1750 are stock. Are the Webber numbers the same as Dellorto? Thx

jrschwit · #6 (**permalink**) 12-15-2003, 04:06 PM

Trav,
I have a list of Dellorto jetting but it's at home and I'm traveling on business. Will be happy to look it up next week if you still need it.
Jim

**Trav** · #7 (**permalink**) 12-16-2003, 01:52 PM

Jim, thanks I would appreciate you posting the Dellorto specs!

TD

jrschwit · #8 (**permalink**) 12-22-2003, 07:44 PM

Trav,
My copy of Brookland Bros. Giulia-Spider Owners Workshop Manual lists Carb specs for a number of Alfas.

For 1750 Dellortos they list:
Type DHLA 40
Choke tube 32
Main jet 135
Air correction jet 200
Slow running jet 50
pump jet 40
Choke jet 70
Float needle 1.5
Float weight 10 gr.

Regards,
Jim

**Trav** · #9 (**permalink**) 12-23-2003, 08:42 AM

Jim thanks for the info.
Trav