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The Twin Screw Thread

 
Old 01-17-2019, 03:00 PM
  #3061  
hans14914
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Partial assembly with printed parts. As soon as all the recent stuff comes out of the printer, its onto a car for final firewall clearance testing and then the POs go in for throttle components.


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Old 01-18-2019, 07:02 PM
  #3062  
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wow put me down for one . !!!!!!! I will get another car just to use this beautiful work . !!!!!!!
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Old 01-18-2019, 08:17 PM
  #3063  
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What IS that exactly? I get the dual throttle plates but don't see how it fits in the system (have an abstract schematic)? It's certainly beautiful.
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Old 01-21-2019, 01:16 PM
  #3064  
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Here are some more photos with the mockup parts on the assembly so far. All the printed plastic parts will eventually become machined metal bits. Test fit, revise, test fit, revise..... its how you get a perfect fit the first time.










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Old 01-21-2019, 05:32 PM
  #3065  
SeanR
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The more I look, the more I want.
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Old 01-22-2019, 12:47 AM
  #3066  
soontobered84
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Originally Posted by SeanR View Post
The more I look, the more I want.
Yeah, but then you'd have to give up that beautiful blue intake. For real, it really is beautiful
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Old 01-22-2019, 10:12 AM
  #3067  
Chris Lockhart
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OMG Hans, that's stunning! As has been said before in this thread, pure automotive jewelry. Kudos.
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Old 03-20-2019, 06:14 PM
  #3068  
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The new billet fuel rails just came back from the anodizer today. There are several design features to lower the weight and thermal mass, but also improve access to the manifold mounting hardware. Ports for fuel dampers between each "pair" of injectors were added to decrease the nominal diameter to a -6 size for further reduction of fluid heat transfer.

Getting close to a completely assembled manifold.






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Old 03-20-2019, 09:41 PM
  #3069  
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Installed on a test motor to show rail and damper clearance.
]

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Old 03-20-2019, 11:14 PM
  #3070  
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hope you are making at least 10 and maybe 20 cause this is collectible and valuable for all owners !!!!
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Old 03-21-2019, 01:31 AM
  #3071  
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Making six for now. One for me, and five for some very trusting early adopters. We will see how it goes from there. Its been an experience for sure.
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Old 03-21-2019, 10:14 AM
  #3072  
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All I'm waiting on is to hit the lottery, and then I'll want 2 of them!!
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Old 03-21-2019, 11:51 AM
  #3073  
V2Rocket
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What are the odds that a VW Bosch 4 bar FPR will fit in the spot of one of your dampers?
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Old 03-21-2019, 12:50 PM
  #3074  
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Originally Posted by V2Rocket View Post
What are the odds that a VW Bosch 4 bar FPR will fit in the spot of one of your dampers?
Zero chance - the "socket" is a completely different shape. I have modeled rails and regulator housings to use the Bosch insert, and have those designs on the shelf. The bosh regulators are great, and I would have used one if they would flow enough return for this application. All the factory Bosch non-motorsport regulators are designed for 220lph of return flow through the metering orifice. Beyond that, they will not behave linearly, and you will need to account for that with an active feedback loop using a fuel pressure transducer and correction table.

I am using a 350lph pump. so needed something with a larger orifice to account for the large amount of return flow at idle, cruise, and decel periods. The regulator I have selected can support up to 500lph of return before linearity is effected. It is always a good idea to use a FP transducer and correction/failsafe table, but its sure is a lot better when you are working from a stable linear output to start with.

One way around the issue is using a PWM controller for the pump, so it always maintains a relation in which the excess capacity beyond the need of the injectors is under the 220lph threshold. It is something I considered myself, but thought better about it for troubleshooting purposes for others downstream.

Regards
Hans
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