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Product details
The EMPI 43-5546-0 is a .55 idle jet that sets the idle and low-speed mixture in PMO carburetors and in Weber IDF, Weber DCNF, and EMPI HPMX carburetors. It is the idle jet size PMO specifies in five of its eight complete carb sets: the 40mm sets for 2.0 to 2.4, 2.4 to 2.7, and 2.8 to 3.0 liters, the 46mm Performance set for 2.8 to 3.0 liters, and the 46mm Street set for 3.2 to 3.4 liters. PMO built its carburetors around IDF jets and floats, and its jet page lists this EMPI number as the PMO .55 idle jet.
The idle jet meters fuel from idle to roughly 2,500 rpm. Moving up to the .60 (43-5516-0) richens that range, which is what PMO uses in its 3.2 to 3.4 liter Performance set and both 50mm sets.
Technical Details
- Manufacturer: EMPI
- Manufacturer part number: 43-5546-0
- Size: .55
- Weber series: 74405
- Sold as: each
Fitment & Compatibility
Fits PMO carburetors on air-cooled Porsche 911 engines, plus Weber 40, 44, and 48 IDF, Weber DCNF, and EMPI 40 and 44 HPMX carbs. The Weber 48 IDA and EMPI EPC 48/51 use a different idle jet series.
Common Questions
Is this sold as a set?
No, each. A flat-six PMO setup has six throats and needs six.
Which idle jet size should I start with on my PMO carbs?
Start with what your carb set came with. Go up one size if it is lean off idle, down one if it is rich.
