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Registered
Join Date: Jun 2001
Location: Sweden
Posts: 5,911
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Just finished modelling headers
I just finished a marathon 4-hours session of CSG-modelling a custom set of headers for out B234L-bolted-to-Garrett-GT40 project.
I used exacty same pipe and bend dimensions as our local stainless supplier has on sale (SS2353, 44.5mm diameter). I also went to great lengths to assure that cylinders 1 & 4 and 2 & 3 merge as late as possible into each of two exhaust ports in GT40 turbo. I'l try to do some FEM calculations later if i find suitable software, but we are going to use extra holes in the head to strenghten things up (it's a heavy turbo). Only 90 and 45-degree bends used. Whadayathink?   
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Thank you for your time, |
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07-16-2003, 05:18 PM
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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,189
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Cool
If you want to send me the model, I can do an FEM (FEA) for the weight of the turbo. Though I think that you should plan on the turbo moving around a lot, just from thermal expansion. (I suppose you know this. . .never mind.) Anyway, for support, I would suggest a bracket coming straight off the engine block. Either that, or maybe throw some gussets on there. Kind of like: 
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong. Disclaimer: the above was 2¢ worth. More information is available as my professional opinion, which is provided for an exorbitant fee. 
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07-16-2003, 05:35 PM
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Registered
Join Date: Jun 2001
Location: Sweden
Posts: 5,911
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Thanx! I will use gussets and will find a way to support turbo trough extra structure bolted on cold part of turbo (probably bearing housing)...those pipes get pretty soft when they are glowing red and i don't trust them for supporting entire weight (i've seen headers that just "melted" down)
About FEM, model is done in CSG but modeller can also export mesh of objects...i'll see if i can get it in some exchangable format. I actually used shareware modeller and freeware raytracer to do this...Solidworks is way too expensive for me.
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Thank you for your time, Last edited by beepbeep; 07-16-2003 at 05:48 PM.. |
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07-16-2003, 05:43 PM
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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,189
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IGES format would be great.
The meshing on my end is all automated, so no need for a meshed version. In fact a meshed version may cause problems. edit
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong. Disclaimer: the above was 2¢ worth. More information is available as my professional opinion, which is provided for an exorbitant fee.
Last edited by island911; 07-16-2003 at 05:58 PM.. |
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07-16-2003, 05:51 PM
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Registered
Join Date: Jun 2003
Location: White Lake, MI
Posts: 229
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Anyone need translations, I can pretty much do anything, IGES, Unigraphics, STEP, parasolids, Solidworks... Catia even.
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07-17-2003, 07:40 AM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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What program did you use to make those?
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07-17-2003, 07:44 AM
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Registered
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Looks like a bundle of snakes (I think that's what the original ones were called). Nice Work!
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John Adams 1980 ROW 911SC |
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07-17-2003, 09:29 AM
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1980 Porsche ROW 911SC 3.0L
