ScrapQueen's turbocharger jet

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ScrapQueen
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ScrapQueen's turbocharger jet

Post by ScrapQueen » Mon Dec 14, 2020 5:33 pm

Hiya, im on my antics still! Since I was a kid I wanted to build a turbine, and here I am. For the last month and a half I've been working on a self imposed final project in welding class. Making a turbo jet out of a no-name t3t4 turbo. I think the math is right, the flame tube seems to function on its own with a shop vac stuck in the intake. I haven't fired it on the turbo as I'm still waiting on my oil pump and fittings. Heres a smattering of photos of it in various stages.

Flame tube and propane burner
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It lives!
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The rig it'll all be attached to.
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My horrid ignitor box. The automotive professor was kind enough to wire me a buzz coil for the spark plug.

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Still figuring out the oil pipes. The boiler maintenance professor says the bypass should lead to the oil tank in a third hole rather than lead back to the outlet in a T joint. Thoughts?
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And a test run of the flame tube with a shop vac.

https://youtu.be/KX5gR-zJlpE

I feel like I'm in the home stretch here!

metiz
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Re: ScrapQueen's turbocharger jet

Post by metiz » Mon Dec 14, 2020 9:44 pm

I tried to build one of these things before. I had a hot (non)start and burned up the turbine. The only advice I can give is: don't try starting too long or you risk overheating. Also, as a general rule: bigger turbo chargers are better suited than the little ones. On a side note: welds are really improving!
Quantify the world.

ScrapQueen
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Re: ScrapQueen's turbocharger jet

Post by ScrapQueen » Sat Dec 19, 2020 9:55 pm

Well heres the last of my progress until the next semester of school starts. I've got the oil system almost done. The return line is installed as well as the bypass. I just need to install the radiator for the oil, pipe that from the pump then to the oil filter. I worked with the HVAC/plumbing professors as well as auto and they agreed the 5/16" copper tubing should be sufficient to feed the 4 way where the turbo hose attaches.

All I need is to wire a battery and variable resistor for the pump speed. Auto professor found some kind of old headlight controller with a variable resistor in it that we have to figure out how to use.
The controller number is e77b11654aa not sure if I should bother with that or just buy a chunky potentiometer. There are a *lot* of terminals on it.

I ran out of 2 inch pipe for the compressor line so I scrounged a muffler in the auto shop and cut off the tailpipe and hose clamped that on.

Anyhow here's the pics of my progress!

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Class just ended yesterday and I'm already antsy to return!

ScrapQueen
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Re: ScrapQueen's turbocharger jet

Post by ScrapQueen » Fri Jan 15, 2021 3:37 am

Righto! So class has been back for a bit and I've gotten it all wired up and piped. I just test fired it today but could not get it up to speed due to pump gremlins. And leaks. Oh boy the leaks.

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My professors came to be my lab assistants for the test run. We were having tons of issues trying to light it until I took the spark plug out and found the contacts were shorted. Wheeled it outside again and it ignited with a pretty good backfire and we got a good 2 foot jet come out the exhaust aaaaand the pump crapped out again. :x We didn't get it to self sustaining speeds but it had a nice flame that boiled the paint off the cart.

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Its a 3.7GPM gear pump advertised to do 50 PSI for boat turbochargers but it keeps tripping the thermal overload above 20 PSI. I'm trying to figure out if its the pump or how my bypass is set up.

The automotive professor has a Subaru power steering pump but I'll need a motor with a belt to drive it. I'm scrounging for that and/or a different scavenge pump. He also found me a 12 volt fan for part of an air conditioner that has an extremely fast motor that I'll be using to start the compressor without wrangling a shop vac

I went and gave it a little bit of an exhaust pipe now that I see it ignites before heading home.

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also oh god the oil leak whack-a-mole :shock:

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