{"product_id":"billet-aluminum-solex-to-weber-carburetor-adapter-plates-porsche-356-super-90-sc-912","title":"Billet Aluminum Solex-to-Weber Carburetor Adapter Plates — Porsche 356 Super 90, SC \u0026 912 (Pair)","description":"\u003cp\u003ePrecision-machined billet aluminum carburetor adapter plates for converting Porsche 356 Super 90, SC, and 912 engines from the original Solex carburetors to Weber IDF or DCNF carburetors. Sold as a pair (one per side). Made by Washburn's Metal.\u003c\/p\u003e\n\n\u003ch3\u003eWhy the Solex-to-Weber conversion is so common on 356s and 912s\u003c\/h3\u003e\n\u003cp\u003eThe original Solex 40 PII-4 carburetors fitted to Porsche 356 Super 90, SC, and 912 engines are notoriously difficult to keep in tune. Parts availability is poor, rebuild specialists are rare, and even a properly-rebuilt set tends to drift out of sync within a few hundred miles. Many 356 and 912 owners have moved to Weber 40 IDF or 44 IDF carburetors over the years because they're easier to tune, more reliably available, and well-supported by the air-cooled performance community.\u003c\/p\u003e\n\n\u003cp\u003eThe challenge: the Weber bolt pattern doesn't match the Solex flange on the factory Porsche intake manifold. These adapter plates bridge that gap — Weber bolt pattern on top, Solex pattern on the bottom — letting you keep your original Porsche manifolds and add modern Weber carburetors without permanent modification.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Billet aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Solex flange (bottom) to Weber flange (top)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as:\u003c\/strong\u003e Pair (one per carburetor)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Washburn's Metal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePorsche 356 Super 90 (1959–1963) — Solex 40 PII-4 carburetor manifold\u003c\/li\u003e\n\u003cli\u003ePorsche 356 SC (1964–1965) — Solex 40 PII-4 carburetor manifold\u003c\/li\u003e\n\u003cli\u003ePorsche 912 (1965–1969) — Solex 40 PII-4 carburetor manifold\u003c\/li\u003e\n\u003cli\u003eOther applications using the same Solex flange-to-Weber conversion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e These adapters work with the original Porsche Solex-pattern intake manifolds. If your manifolds have been replaced with Weber-direct manifolds, you don't need these adapters. Confirm your manifold flange pattern before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich Weber carburetor do these adapt to — IDF or DCNF?\u003c\/strong\u003e\u003cbr\u003e\nThe Weber flange pattern is the standard IDF\/DCNF pattern used across the Weber sidedraft and downdraft line. Both 40 IDF and 44 IDF Webers bolt up. Contact us if you're running a less common Weber variant.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need new linkage and air cleaners?\u003c\/strong\u003e\u003cbr\u003e\nYes. Solex-to-Weber conversion is a complete carburetion swap. You'll need Weber-specific linkage (typically a hex-bar style), Weber air cleaners, and matching jets\/venturis for your engine's displacement and state of tune.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this reduce performance compared to properly-rebuilt Solex carbs?\u003c\/strong\u003e\u003cbr\u003e\nNo. A well-tuned Weber setup will match or exceed a properly-rebuilt Solex setup in driveability and reliability. The main downside is loss of originality — for a numbers-matching show car, keeping the Solex carbs is the more correct choice.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these reversible?\u003c\/strong\u003e\u003cbr\u003e\nYes. The conversion is fully reversible — your original Porsche manifolds aren't modified, just adapted. Save your original Solex carbs and you can go back to factory configuration anytime.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo they include gaskets?\u003c\/strong\u003e\u003cbr\u003e\nContact us to confirm — gaskets vary by application and we typically supply or recommend the correct gasket sets based on your specific carburetor choice.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill they fit a 356A or 356B with the smaller Solex 32 carbs?\u003c\/strong\u003e\u003cbr\u003e\nNo. These are sized for the larger 40 PII-4 manifolds used on Super 90, SC, and 912. The smaller-engine 356A\/B uses a different manifold flange.\u003c\/p\u003e","brand":"Washburn's Metal","offers":[{"title":"Default Title","offer_id":44282836189299,"sku":null,"price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/20250904_163516A.jpg?v=1770521370","url":"https:\/\/shop.washburnsmetal.com\/products\/billet-aluminum-solex-to-weber-carburetor-adapter-plates-porsche-356-super-90-sc-912","provider":"Washburn's Metal","version":"1.0","type":"link"}