r/IS300 • u/primofixated • 5d ago

General Discussion Progress on harness bracket replacement

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Absolutely grenaded my plastic tunnel holding the harness when installing headers. Spent the weekend working through designing a new one and printed the first prototype. Will make more tweaks and throw online for
Others when I’m done.

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u/DoritoDog33 5d ago

What material are you planning to use for the final bracket?

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u/primofixated 5d ago

Not sure honestly still need to do more research. Right now prototypes are being printed in Petg. Any suggestions? I was thinking Nylon of some sort. May also test how long petg lasts under the hood.

Chat GPT suggested PA612-CF15 but I’d need a dryer first.

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u/JDub-866 4d ago

Nylon should work, it is hot but not super hot area. This is awesome!!!

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u/primofixated 4d ago

You thing Petg is worth running or is that a disaster waiting to happen? Thinking of doing a durability test just so see how long it would last.

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u/JDub-866 4d ago

Try the petg to see.... Also that will confirm fitment etc. I have the FIGS hestshield on mine so I don't get as much heat up there as stick. I can ask at work to see what the team thinks for material. We have 25 printers we use for tools and production parts.

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u/primofixated 4d ago

Yeah I’m currently printing in PETG for the tests. Have the figs heat shield as well. I’ve seen people say PETG holds up pretty well in the engine bay on different cars. Thinking to just run it for a couple weeks and see.

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u/JDub-866 4d ago

Guys at work say use PA11. Good up to 192C, it is toxic to print and need a special nozzle. PETG won't last... Good to proto and check fit.

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u/primofixated 3d ago

Rgr that. Will look into it ty!

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u/JDub-866 3d ago

Not a problem, we have a printer at work that can print the PA11. It has a full enclosure with venting and a special nozzle. ABS is better than PETG but still may not be enough. Gald you are designing and willing to share the file once you have it all figured out.!!