3D Printed oil cooler without $30k software? Mistakes were made - Building a 13B Rotary BMW i8: EP15

Couch Built October 29, 2025
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Couch Built

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Building cars, mostly from the couch, with use of 3D scanning, Fusion360, and some bloody knuckles sprinkled in. Currently building a 2016 BMW i8 with a 13B-REW mated to a VAG 7 speed DQ500 DSG while retaining full hybrid functionality...or at least that's the plan. Follow along as I overcomplicate a complicated BMW and nerd out on making it all work together.

Video Description

In this episode we look at designing, manufacturing and testing two 3D printed aluminum heat exchanger designs that were generated without the use of $30K professional software. A few mistakes were made. 0:00 – Why are we printing a cooler? 2:35 - Gyroid lattice in Fusion 4:45 - Cooler version 1 cost and post processing 7:00 - Wait, we did it wrong 8:25 - TPMS gyroids in Blender 10:10 - Using the Blender gyroid in Fusion 11:20 - Air Shaper internal CFD analysis 11:56 - Cooler version 2 review and post processing 17:30 - Testing the coolers 21:24 - The data 22:55 - Did we make it better? Cults3D blender file https://cults3d.com/en/3d-model/tool/blender-tpms-gyroid-array Air Shaper CFD Analysis https://airshaper.com/ Craft Cloud https://craftcloud3d.com/ 10% discount code off your first Craft Cloud order! REFZ10W5P18 TOPDON Thermal camera https://www.topdon.us/collections/thermal-imagers/products/tc003 STM32 Development board https://www.st.com/en/evaluation-tools/stm32h735g-dk.html Everlast Welders Typhoon 330 https://www.everlastgenerators.com/?rfsn=8797240.04da45 SendCutSend Get 15% off laser cut parts for you own project with the below link! https://sendcutsend.com/couch-built If you want to get started with learning how to design or fabricate your own parts with some of the methods used throughout my build series, check out HP Academy for some well-produced, high-quality motorsports focused coursework. 3D Modeling & CAD for Motorsport https://hpcdmy.co/CouchBuiltCAD Visit with the link below and use discount code COUCH75 for $75 off any of their available courses. Full Course Selection https://hpcdmy.co/CouchBuiltCourses Contact [email protected]

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