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While I'm waiting for <100 degree days to flash the ECU with a new tune (from DIY Auto Tune to a
Now that the car is running, I've found a few minor problems. Most are tuning related, and I will h
If I may make a suggestion, if you weld, take a piece of thick-walled Al tubing and put a bend in it to point it towards your oil drain port, weld it to the turbo drain flange, and then either weld it right onto the flange on the pan (hard pipe) or use a really short section of high temp silicone hose to connect it. If you're using just silicone, or braided stainless hose, it will fail, probably at the worst possible time. Could even cause a fire. Maybe more of an issue for me with rotary engine heat, but braided stainless is often the worst in high heat areas like turbo drains. That hose will get all crispy inside and fail but the outside will still look good.
Sadly, I do not weld and don't know anyone who does. I like your suggestion - just not sure who can build a hard line like that for me. For now, I am planning to replace it with an ordinary high-temp oil hose (but not braided) with press-in/clamp-on fittings.
Another option is to bend some 5/8" steel or stainless tubing into the right shape and borrow / buy an AN flare tool. They're not too expensive if you do your own work. You'll use it a lot. Then it's a matter of a -10 drain flange for the turbo and a -10 tubing nut. You probably have to remove the compressor housing to access the fitting with a wrench. That might be an easier fix. Otherwise, for safety I'd be replacing that drain line at the beginning of the driving season and inspecting it frequently.
Same thing with wastegate lines. Your internally-gated turbo wouldn't need hard lines to the actuator but it's a good idea to put a heat sleeve on your tubing so they don't melt / get crispy / blow out pinholes with heat over time. It took me all of a couple of days of tuning and doing pulls to melt my wastegate lines. Big difference is rotary heat and external wastegate but still...
I appreciate the advice. I had thought about sleeving my heater core lines, but not the oil return or the wastegate actuator.
I replaced the non-curing thread sealant with RTV and waited 24 hours. It was a looong 24 hours. Af
1992 Mazda MX-5 Miata
1991 Mazda MX-5 Miata
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