Help needed with 1966 Fulvia S1 1.2 DHLB 32 Jetting and Settings

[lambretta69]

Hi Everyone, I have a pair of Dellorto DHLB 32 that I want to set up for my 1966 Fulvia S1 1.2. It's a stock engine and has an Abarth performance exhaust. I purchased the Omicron Fulvia Dell'Orto Carburetor Setting Manual but it's not specifically for my car so I'm hoping someone on this forum can help. If you have any experience with this, can you please let me know what sizes I would need to adjust for my car? Here are the specs for a DHLB 35. I can't find information for DHLB 32 anywhere. Thanks in advance -Rob.

Venturi 33 mm (obv too big for DHBL 32)
Main Jets 112 mm
Main emulsion 7772.4 or 7772.3
Main air correctors 200
Idle jets 45
Idle air correctors 120
Power jet 60
Starter jet 70
Pump jet 45
Fuel inlet 150
Float No. 1, 7298.1 10 grams, 13-13.5mm level

[marnix]

Hi. Included (I hope it works...) a document that gives all the details specific for DHLB carbs on the Fulvia.

[marnix]

Something additionally important for S1 cars without fuel return line and without fuel pressure regulator; and that was not in the document:

- the DHLB carburettors are extremely sensitive to too high fuel pressure. For S1 Fulvia cars without fuel return line and not equipped with a fuel pressure regulator it is almost mandatory to install a fuel pressure regulator. Especially with aftermarket fuel pumps that almost all give higher fuel pressure than the original FISPA pump.

Modern fuel pressure regulators are available, like the MALPASSI. They are available as a pressure regulator only, or with fuel filter element.