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Old 12-08-2021, 09:51 PM   #401
Nick M3
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Working on developing new skills. Very difficult.
Nice! I've got some aluminum that needs welding when you you're ready.
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Old 12-09-2021, 10:00 AM   #402
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I wouldn't trust my skills on anything you care about. So you make the call on that one.

If you need help on something mission critical though, Larry Casey does amazing work.
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Old 12-14-2021, 10:45 AM   #403
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More TIG practice. The 3" aluminum tube running from the intercooler outlet to the TB inlet never fit well because the junction was at a ~ 20 degree angle and I made up the difference with a silicone joiner. I decided to fix that and bought a 22 degree bend and welded it to the (shortened) tube from the intercooler. You can also see the little box I fabbed up to shield the ECU from heat and moisture (though the Haltech is supposedly waterproof)



Definitely getting better at this but I still need lots of practice. The more major stuff I have planned (fresh-air anti-lag) will require stainless welding and backpurging, and I don't have a second argon bottle and reg so I'll have to go to Larry's to do it.
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Old 12-14-2021, 11:27 AM   #404
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Definitely getting better at this but I still need lots of practice. The more major stuff I have planned (fresh-air anti-lag) will require stainless welding and backpurging, and I don't have a second argon bottle and reg so I'll have to go to Larry's to do it.
Want to let me know when you do that? If possible and you don't mind another body around, I'd kind of like to observe (without directly watching certain parts).
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Old 12-14-2021, 11:35 AM   #405
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That sounds great. I'll keep you posted.
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Old 02-03-2022, 03:13 PM   #406
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I've been doing a lot of welding. Mostly aluminum, but I started a new project that will require welding of 316 and 304 SS.

I've decided that I want to add anti-lag to the RX-8. This will be a huge learning experience on the engine tuning side, but that's kind of what this car is about.

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Old 02-03-2022, 03:23 PM   #407
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I've been doing a lot of welding. Mostly aluminum, but I started a new project that will require welding of 316 and 304 SS.

I've decided that I want to add anti-lag to the RX-8. This will be a huge learning experience on the engine tuning side, but that's kind of what this car is about.

great looking fabrication.

Does this take air pressure from somewhere else and feed it into the exhaust manifold when there's not a lot of exhaust pressure to keep the turbo spooled?
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Old 02-03-2022, 03:35 PM   #408
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Turbos work based on heat energy, not gas flow. So the key to anti-lag is making heat in the exhaust when the throttle is closed. The cleanest way to do this is to plumb a pressurized air source into the exhaust runners at their hottest point (near the cylinder head) when the throttle is closed, cut spark and add fuel. The Haltech has this capability programmed in with the appropriate safeties, so in theory all I need to do is add a valve and air tubes to direct boost pressure to the exhaust manifold. Combustion then occurs in the exhaust manifold instead of in the cylinder. The key is adding enough fuel and controlling the turbo speed because this is effectively a positive-feedback loop that can cause Really Bad Things if left unchecked.
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Old 02-04-2022, 08:10 PM   #409
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Well, so this took a long time. I'm not done, but it's very close. This has been an interesting problem to solve. I needed to keep access to the manifold fasteners, clearance to the cylinder head, water pipes, turbo, and various other underhood thingies. And then there's an order of operations to drilling the manifold and welding each of the pipes to the runners. I think I'm in the clear still but I'm burned out and my neck hurts from being under a helmet all day. Not sure how professional welders can do this every day.







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Old 02-05-2022, 12:54 AM   #410
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It's looking good!
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