Here's another carb adapter, same application for the other one I've posted before (Ford Festiva) but for a Toyota 3k carb. I 3d scanned the flanges of the manifold and the carb and drew them as sketches in Fusion360, and extruded them. Added a loft between the ports for a nice transition Then made up a core model, added coreprints, and drafted and filleted everything. Used the core model to make a corebox model too. This is the bit that makes the most time. 3d printer goes brrrrr, and then a judicious application of high-build primer, followed by tedious hand sanding to minimize layer lines Gave the patterns a test run Corebox makes a butt apparently Butt, errr... Core set in the drag Decided to make a few molds to test sprue size Funny how casting revolves around molten metal, but up til this point there's a substantial number of hours invested in design, pattern work, molding etc and the pour takes mere seconds. And then the gratuitous shakeout, revealing a sturdy, useful metal thing which has never existed before! Degate, knock off the flash, and a bit of fettling of the parting lines prepares it to meet the mighty facemill With some metal bits made it was back to the PC to design some drilling jigs, and more print hours brrrrr Which permits accurate drilling and tapping. They self-align to the bore so it's always centered perfectly within the bolt holes. Top flange gets tapped M8x1.25 for studs. Had some minor issues with tolerancing the cores, I've always struggled with that. Last project they were too tight. Made them what I felt was "Just Right" this time, which was a little too loose, the cores floated to the cope by a mm or so. Parts are still perfectly usable but will have to tighten the coreprints a bit for the next go. Gratuitous money shots. And with that its time to ship my hard work off to some folks for testing to see if this configuration even works. A fair bit of time invested on a gamble but I really like making car parts and on paper it works out, if it works we'll see if the market warrants further production Thanks for lookin' Edit: whoops probably should have posted in the projects sub.
