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Old 06-23-2021, 06:46 AM   #51
dalek
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They are brand new but my welding skills are not the best but it’s not that easiest to weld thin tubing with a stick welder so. But it’s holding together and hopefully not leaking.
They are still better than mine. But, the fact you did your welds using one inspires me to actually sit down and put time on the one I have. If nothing else, I can use it to tack pieces together and then take them to someone who can do better welds than me. I just need to stop being a lazy ass...
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Old 06-23-2021, 08:04 AM   #52
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Are you cleaning/ sanding your joints before?
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Old 06-23-2021, 08:54 AM   #53
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Are you cleaning/ sanding your joints before?
I’m using a steel brush to clean the area that I’m about to weld and I take the welding slag of to.
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Old 06-23-2021, 10:20 AM   #54
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I’m using a steel brush to clean the area that I’m about to weld and I take the welding slag of to.
You might want to add wiping them with acetone after brushing. But give em a pressure test and they should be fine.

On the note of trying TIG with your stick welder. Its worth it. A torch runs like $100USD, then rent a bottle of 100%argon. Scratch start doesnt require a ton of fancy expensive equipment, and the control and weld quality can pay for themselves in the long run. Cracked manifolds are no fun, and even less fun if you're on a budget.

Its all coming along though! Keep it up.
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Old 06-23-2021, 10:26 AM   #55
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I can't see the photos at work, but I will comment on the process.

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They are brand new but my welding skills are not the best but it’s not that easiest to weld thin tubing with a stick welder so. But it’s holding together and hopefully not leaking.
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I’m using a steel brush to clean the area that I’m about to weld and I take the welding slag of to.
My father stick welded everything. He learned on the job at a chicken plant, and his trick was to grind a bevel on any joints, then sand back farther. Sometime he did an ok job for someone who never had the best equipment or training. I use MIG for almost anything, can barely stick weld. But I am very good at torch welding and OK at stick, because I started out torch welding/brazing.
Keep practicing and clean/bevel your pipes. I would rather have something ugly that runs than have a trailer queen I can't drive.
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Old 06-23-2021, 10:30 AM   #56
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One question on the design. I know very little about compound turbo design, except for tractor pull monsters. They would use the large turbo first in line, then small. They said the small would draw through the large and get some heat going, then the large turbo would spool, and the compressed air from the large would then be re-compressed by the small. (this is all cold side, I can't remember if they went small to large on the hot side) They also used alcohol and propane and other ways to get them to spool.
so I was wondering If this is a different design.
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Old 06-23-2021, 03:44 PM   #57
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One question on the design. I know very little about compound turbo design, except for tractor pull monsters. They would use the large turbo first in line, then small. They said the small would draw through the large and get some heat going, then the large turbo would spool, and the compressed air from the large would then be re-compressed by the small. (this is all cold side, I can't remember if they went small to large on the hot side) They also used alcohol and propane and other ways to get them to spool.
so I was wondering If this is a different design.

I have only seen that the big turbo feed the small turbo and the small turbo first in the exhaust flow. I think they do the big turbo first to get lower back pressure and to get the most heat energy in to the big turbo. All the oem setups I have seen use the small turbo first in line to get it to spool faster and drive ability.
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Old 06-28-2021, 02:21 PM   #58
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Update!

Needed to make a oil return in to the oil pan because the big turbo sits to low to make it to the stock oil return.

Little to no leaks in the exhaust manifold now after some pressure testing with soapy water.

It's tight on the cold side maybe some slight massaging with a hammer is needed

The wastegate to the big turbo is placed behind the cylinder head, Really the only place that was big enough for it (38 mm hurricane watergate)





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Old 07-01-2021, 01:32 PM   #59
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A question what is the smallest oem turbo with twin scroll.


It's needs to be twin scroll because i what to do a built in quick spool valve so it spool even faster same with the big turbo. Borg Warner have done something like this in a prototype.

Something like this. Not my picture.

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Old 07-01-2021, 01:41 PM   #60
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Hi Marcus,
I dont have an answer for that. I've never run twin scroll but id like to say what your doing there certainly seems to be coming along well. Its certainly pleasing to my eyes. You have it fitting rather nicely in there. Keep at it.


Regards
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Last edited by hk 40; 07-01-2021 at 02:17 PM..
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Old 07-01-2021, 01:50 PM   #61
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Originally Posted by marcusj2001 View Post
A question what is the smallest oem turbo with twin scroll.


It's needs to be twin scroll because i what to do a built in quick spool valve so it spool even faster same with the big turbo. Borg Warner have done something like this in a prototype.

Something like this. Not my picture.

you would probably want to look at the diesel world for small twin scroll stuff. hx35 is fairly small (not dimensionally though!). you can probably get a twin scroll housing for the big turbo you already have, and work from there.
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Old 07-03-2021, 10:19 AM   #62
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Update!

Needed to make a oil return in to the oil pan because the big turbo sits to low to make it to the stock oil return.
Just to make sure, the tube going to oil pan is steel, going in a bit of an angle, and is still above the oil line, right? From the camera angle it is hard for me to see.
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Old 07-04-2021, 04:49 PM   #63
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Just to make sure, the tube going to oil pan is steel, going in a bit of an angle, and is still above the oil line, right? From the camera angle it is hard for me to see.
I think it's just over the full line or so I hope.
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Old 07-04-2021, 04:58 PM   #64
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I have look at maybe using a vnt turbo for a diesel for the small turbo. Something lika a gt15 or gt17 turbo.


Some inspiration from bmw with there 3 and 4 turbo 6 cylinder engine.



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Old 07-04-2021, 05:09 PM   #65
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Plenty of OEM turbos these days are twin scroll. First one that comes to find is the BMW N55 single turbos, but that's because I've got one saved for a future project.

From a quick Google looks like Mini (so FWD BMW) is teasing twin scrolls now, and if you've ever held one of those turbos you know just how Mini it is

Last edited by James M; 07-04-2021 at 05:18 PM..
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Old 07-13-2021, 09:53 AM   #66
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Hälsningsfraser Marcus,

Where are you in your work? Done anything else yet?


TIA
Hubert
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Old 07-13-2021, 12:20 PM   #67
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Plenty of OEM turbos these days are twin scroll. First one that comes to find is the BMW N55 single turbos, but that's because I've got one saved for a future project.
What are you going to do about its exhaust manifold? Is it part of the turbine or you can separate them?
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Old 07-14-2021, 04:19 PM   #68
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Hälsningsfraser Marcus,

Where are you in your work? Done anything else yet?


TIA
Hubert
I bit on the wiring harness but not much had a lot at work so not a lot of spare time right now but it's getting there.

Have also looked around at smaller turbos then the 16t so i can get almost instant boost
Like a gt1549v that is a vnt turbo so hope it doesn't melt or a turbo from a mini like James M suggested. I get to test when the head gasket blows with so much boost at so low of a rpm.
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Old 07-15-2021, 02:30 AM   #69
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A lot of the newer turbo driven cars have the exhaust housing integrated in the manifold, or there is no exhaust manifold anymore as everything is integrated in the cylinder head.

The turbo from the 1.0 ecoboost ford engines could be a good choice. https://www.continental-aftermarket....att_de_web.pdf
Drove a fiesta with this engine with 100hp... Zero turbolag, zero power above 4500rpm :-)
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Old 07-15-2021, 08:15 AM   #70
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The Ko3's I have are not part of the header in the allroad engine. The are not dual scroll though
.

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