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Old 01-13-2016, 12:55 AM   #81 (permalink)
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Tradition is to cut down a Model T torque tube, but that would be oversized, so: used motorcycle parts.

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Old 01-13-2016, 12:16 PM   #82 (permalink)
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Quote:
Originally Posted by Old Tele man View Post
And, (maybe?) you aren't restricted to ROUND header pipes (?!?!?):



...which remind me of waveguides used in microwave radars!
Besides being far more difficult to find as mandrel-bent pieces and harder to fabricate, flow would be worse due to interference drag at the 90 intersection between the walls. The only reason square-ish runners are used in intakes or exhausts is for transitions dictated by other components (e.g. bolts, pushrods, adjacent runners).
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Old 01-13-2016, 01:52 PM   #83 (permalink)
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http://slideplayer.com/slide/4767166/


3D Reconstruction 2

Round mandrel bent steel is still an approximation. To see really optimized flow look to your own arteries.
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Old 01-13-2016, 08:11 PM   #84 (permalink)
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Yes. In general if not specifically. Also note the oversizing of the 'collector'. I didn't see a version that showed a three-way split.

The asymmetrical flaring of the end cuts would probably improve scavenging.
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Old 01-13-2016, 11:51 PM   #85 (permalink)
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Not directly related, But of interest.

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Old 01-15-2016, 07:03 PM   #86 (permalink)
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You could use longer primaries if you did this:


Just A Car Guy : twisted and tangled
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Old 01-16-2016, 09:29 PM   #87 (permalink)
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That requires skill!
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Old 01-17-2016, 01:26 PM   #88 (permalink)
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My initial thought with the pipes going straight back is this could be used to accelerate the air flow past the tail of the underbody like a blown diffuser...
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Old 01-17-2016, 01:48 PM   #89 (permalink)
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Exhaust is corrosive, anything you do like that would need to be all stainless steel.
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Old 01-18-2016, 01:41 PM   #90 (permalink)
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Quote:
Originally Posted by Daox View Post
I'd imagine we want to keep the angle at 15 degrees or less.
With converging and diverging nozzles I believe 7 degrees is ideal.
There are companies that sell 7 degree reducers for intake and exhaust piping, they are kind of expensive.

I picked up a 304 stainless steel 3 to 4 inch reducer pipe used in a water pumping system to be part of my diesel suburbans new exhaust. It has about a 12 degree slope. Not perfect but since it was free I cant argue. (had a welding defect and could not be used in the high pressure RO system it was intended for)

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