03-25-2014
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#41
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Anyone interested in Cobra adapter brackets
Big fat Jim?
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03-25-2014
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#42
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Join Date: Jul 2004
Location: MN
Drives: four tires
Posts: 1,608
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Re: Anyone interested in Cobra adapter brackets
Yup. Figured I could start with him, then get a couple second opinions.
__________________
NSX - S480/Built motor
GSX - 571whp/490wtq
Sienna
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03-25-2014
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#43
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Anyone interested in Cobra adapter brackets
Yeah he's a smart dude.
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03-26-2014
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#44
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Anyone interested in Cobra adapter brackets
I welcome all opinions! I'm also an engineer (however not a materials expert) and as I'm well acquainted with, you can manufacture anything, use just about any material, attain any tolerance, etc... but everything has a cost.
7075 will nearly triple the material costs, and more exotic alloys will be even more. I'd make and sell them for $120 for a set out of 7075 with current design.
If anyone has connections to get cheap 7075, that would be awesome!
I'm confident I can work something out with 6061-T6 but I need to run a few more simulations.
The struggle at the moment is that i'm not sure what type of temps this part will receive. I am designing this to sustain track/racing conditions. I'm sure it would be completely fine on the street with like a 4x safety factor. I'm currently running a simulation that peaks at about 400F. That cuts the yield strength by about 75%. I have measured race car temps that peak to 1200+F at the caliper, so this adapter could possibly be experiencing a lot of heat.
I think I might have a few made and get some running temp measurements at DCTC before committing to a big production run. I can make some extras for people, with the understanding that it is not yet proven.
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Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
Last edited by s1ngletracker; 03-26-2014 at 12:38 PM..
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03-26-2014
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#45
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Anyone interested in Cobra adapter brackets
This guy Jim, he's pretty hard core. He's not just you're standard mechanical engineer, his specific area of expertise is material and welding, that's all he does. It's funny how real professional welding makes anything any of us (or even shops) do look like childs play. The rest of us can sit here and oogle over the prettiest looking manifold made by say Full Race. Where he'll take a look at it, their material choices, and their process and completely rip it apart like it's garbage.
Long story short, if Momin gets input from him I'd listen
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03-26-2014
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#46
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Anyone interested in Cobra adapter brackets
Ain't seen nothing till you've seen an E-Beam or projection weld! We do welds that hold up to about 10,000 psi here.
I look forward to hearing his input!
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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03-26-2014
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#47
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Anyone interested in Cobra adapter brackets
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03-26-2014
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#48
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Anyone interested in Cobra adapter brackets
Yes! another cool form of welding, I have a friend who works at PaR in that department (who bought the friction stir welding technology from MTS)
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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03-26-2014
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#49
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Anyone interested in Cobra adapter brackets
Who is it? That's where I work, well used to work until Westinghouse bought out the nuclear side of PaR and they renamed us PaR Nuclear...
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03-26-2014
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#50
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Join Date: Jul 2004
Location: MN
Drives: four tires
Posts: 1,608
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Re: Anyone interested in Cobra adapter brackets
Short version of what he said (he said a lot), was no aluminum. Basically through the heat cycles and temp range, it'll loose it's properties and is at risk of failure.
He mentioned aluminum calipers can work due to them being cast(explained the structure of the metal etc.. went beyond what I needed to know :P) and specific alloys being used/chosen combined with cooling techniques employed in car design etc.
Anyways, his first choice was Inconel.. But I said our budgets won't allow it :P
He then said, just choose a common SS and it'll work.
Like Halon mentioned, welding is a whole new world after being directly involved in it for about a year. Not machine welding, human welding. There is a ridiculous other world of AWS/ASME codes/practices etc that need to be strictly followed in the Nuclear world.
__________________
NSX - S480/Built motor
GSX - 571whp/490wtq
Sienna
Last edited by Speedfreak; 03-26-2014 at 07:04 PM..
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03-26-2014
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#51
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Anyone interested in Cobra adapter brackets
Very interesting, thanks!
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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03-26-2014
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#52
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Anyone interested in Cobra adapter brackets
My RTM ones were just carbon steel, came uncharted. I had Primo powder coat them.
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03-27-2014
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#53
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formerly ecoli
Join Date: Oct 2003
Location: On the dyno
Posts: 4,892
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Re: Anyone interested in Cobra adapter brackets
Corrugated lawn sign
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03-27-2014
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#54
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Anyone interested in Cobra adapter brackets
**coroplast. I'm gonna use 10 layers!
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
Last edited by s1ngletracker; 03-27-2014 at 03:10 PM..
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03-31-2014
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#55
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Anyone interested in Cobra adapter brackets
Sorry.. this is getting delayed till after the race at autobahn this weekend and my newest (non-mitsu) car acquisition
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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05-05-2014
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#56
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Anyone interested in Cobra adapter brackets
so I should have a couple sets of prototypes finished this week.
in lieu of some stupid issues with my DSM - is anyone going to be going to DCTC with their 1g anytime soon, and be interested in a set and letting me measure working temps?
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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05-05-2014
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#57
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aka Goodbye
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Re: Anyone interested in Cobra adapter brackets
Not I. But I'd be interested in helping you develop some for the VR4/Cobra rotor combo.
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2009 Corvette Z51-SOLD
1992 Mitsubishi Eclipse GSX-SOLD
2013 BMW Z4-Current summer hooptie
2017 GMC Yukon-Current winter hooptie
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06-04-2014
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#58
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Anyone interested in Cobra adapter brackets
Finally... first prototypes.
I might as well just make these stupid things in steel... but some serious bling factor here.
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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06-04-2014
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#59
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Transmission destroyer
Join Date: Feb 2007
Location: Cambridge
Drives: G37, 91 TSi
Posts: 7,150
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Re: Anyone interested in Cobra adapter brackets
Nice. What material are those?
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Quote:
Originally Posted by scheides
I swing from the nuts of cold hard data. Anything less is a guess.
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06-04-2014
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#60
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Anyone interested in Cobra adapter brackets
ally-yoo-minium
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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