{"product_id":"empi-1-50-main-jet-hpmx-idf-ida-dcoe-43-5309-0","title":"EMPI 1.50 Main Jet for HPMX\/IDF\/IDA\/DCOE Carburetors — 1.50mm metering orifice | Porsche 914 (1970-1976) (43-5309-0)","description":"\u003ch2\u003eEMPI 1.50 Main Jet (43-5309-0) for 40\/44 HPMX, IDF, IDA \u0026amp; DCOE Carburetors\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe EMPI 43-5309-0 is a genuine 1.50 main jet with a 1.50mm calibrated brass orifice that meters fuel at high rpm and wide-open throttle. It threads into EMPI 40\/44 HPMX, Weber 40\/44\/48 IDF, EPC 48\/51, 48 IDA and DCO\/DCOE carburetors on air-cooled engines, including the 1970-1976 Porsche 914. Sold as one threaded brass jet that swaps with a flat screwdriver.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart numbers:\u003c\/strong\u003e EMPI 43-5309-0 \/ 4353090 \/ 43 5309 0 · 1.50 main jet\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eVehicle\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1970–1976\u003c\/td\u003e\n\u003ctd\u003ePorsche 914\u003c\/td\u003e\n\u003ctd\u003eWith EMPI 40\/44 HPMX, Weber 40\/44\/48 IDF, EPC 48\/51, 48 IDA or DCO\/DCOE carburetors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003eAir-cooled engines\u003c\/td\u003e\n\u003ctd\u003eAny engine running one of the carburetors above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIf you are unsure this fits your car, contact us with your year and model before ordering.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003e43-5309-0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eEMPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJet size\u003c\/td\u003e\n\u003ctd\u003e1.50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrifice\u003c\/td\u003e\n\u003ctd\u003e1.50mm calibrated orifice\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eBrass, threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit\u003c\/td\u003e\n\u003ctd\u003eMain jet: meters fuel at high rpm and wide-open throttle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarburetors\u003c\/td\u003e\n\u003ctd\u003eEMPI 40\/44 HPMX, Weber 40\/44\/48 IDF, EPC 48\/51, 48 IDA and DCO\/DCOE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlace in the range\u003c\/td\u003e\n\u003ctd\u003eLarge size for high-output, high-flow builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTool\u003c\/td\u003e\n\u003ctd\u003eFlat screwdriver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoxed dimensions\u003c\/td\u003e\n\u003ctd\u003e2 x 1 x 1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping weight\u003c\/td\u003e\n\u003ctd\u003e0.022 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShips from\u003c\/td\u003e\n\u003ctd\u003eOrange, California\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhy It Matters\u003c\/h3\u003e\u003cp\u003eBig-bore Weber and HPMX engines pull serious air at full throttle, and they punish a jet that is a size shy. The 1.50 main jet feeds that appetite through a 1.50mm brass orifice; step up to it when a 1.45 still comes back lean.\u003c\/p\u003e\u003cp\u003eThe main jet sets the wide-open mixture, so stepping one size at a time is how a larger Weber or HPMX setup gets dialed in. The 1.50 is a large size for high-output, high-flow builds; step up to it when a 1.45 still comes back lean.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cp\u003eThe 1.50 is a threaded brass jet that swaps with a flat screwdriver. Fit it in place of the existing main jet in your 40\/44 HPMX, IDF, IDA or DCOE carburetor.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat carburetors does the EMPI 1.50 main jet fit?\u003c\/strong\u003e\u003cbr\u003eThe EMPI 43-5309-0 1.50 main jet threads into EMPI 40\/44 HPMX, Weber 40\/44\/48 IDF, EPC 48\/51, 48 IDA and DCO\/DCOE carburetors on air-cooled engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the EMPI 43-5309-0 main jet fit a Porsche 914?\u003c\/strong\u003e\u003cbr\u003eYes. It fits the 1970-1976 Porsche 914 when it runs EMPI 40\/44 HPMX, Weber 40\/44\/48 IDF, EPC 48\/51, 48 IDA or DCO\/DCOE carburetors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size orifice is a 1.50 main jet?\u003c\/strong\u003e\u003cbr\u003eA 1.50 main jet has a 1.50mm calibrated brass orifice. EMPI part number 43-5309-0.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does a main jet do on a Weber IDF or HPMX carburetor?\u003c\/strong\u003e\u003cbr\u003eThe main jet is a calibrated brass orifice that meters fuel at high rpm and wide-open throttle. Changing its size richens or leans the wide-open mixture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should I use a 1.50 main jet?\u003c\/strong\u003e\u003cbr\u003eThe 1.50 is a large size for high-output, high-flow builds; step up to it when a 1.45 still comes back lean.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I change the main jet in an IDF or HPMX?\u003c\/strong\u003e\u003cbr\u003eThe EMPI main jet is a threaded brass jet that swaps with a flat screwdriver.\u003c\/p\u003e\n\u003ch3\u003eExplore Related Categories\u003c\/h3\u003e\u003cp\u003eBrowse more from Washburn's Metal: \u003ca href=\"\/collections\/fuel-intake\"\u003eFuel \u0026amp; Intake\u003c\/a\u003e \u003ca href=\"\/collections\/porsche-914\"\u003ePorsche 914\u003c\/a\u003e \u003ca href=\"\/collections\/empi\"\u003eEMPI\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e⚠ California Proposition 65 Warning:\u003c\/strong\u003e This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"EMPI","offers":[{"title":"Default Title","offer_id":45308140257395,"sku":"43-5309-0","price":7.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/43-5309-0-scaled.jpg?v=1785946762","url":"https:\/\/www.washburnsmetal.com\/products\/empi-1-50-main-jet-hpmx-idf-ida-dcoe-43-5309-0","provider":"Washburn's Metal","version":"1.0","type":"link"}