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Old 11-23-2019, 02:25 PM   #1 (permalink)
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So, what’s your thoughts on these connecting rods?

Think they’ll hold up?
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Old 11-23-2019, 02:30 PM   #2 (permalink)
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Enjoy Perfection and Innovation!

Our new Carbon Composite rods for our Mitsubishi evo. 77grm weight. 10 times lower weight than steel and 6.5 times lower than aluminum. Tensile strength over 2600mpa

Designed for +15.000rpm and over 3000hp.

We will test them on the dyno in few days.

Like we told, we are going to abandon the CNC technology, our Gen3 pistons and rods are already in testing procedure. Gen3 pistons and rods will be an evolution in automotive and motorsport. Additive manufacturing, 3D printed Ceramics and 3D printed titanium alloy and carbon will replace Gen2 CNC materials.

Leaving back generative design to Topology optimization.

As we speak we built our ceramic pistons and new ceramic rods to test.

We are so excited to new technologies!

Hope to enjoy it like we do ✌️
Lets see the new world record with these babies 🏁🏁🇬🇷🇬🇷
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Old 11-23-2019, 02:57 PM   #3 (permalink)
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They look awesome. I hope it works. They're already using additive manufacturing on rocket motors and jet engines.
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Old 11-23-2019, 02:58 PM   #4 (permalink)
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looks weak on compression, but time will tell.
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Old 11-23-2019, 03:05 PM   #5 (permalink)
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Are they trolling?

I'm not doubting that shit can be super strong in the right applications, but I don't see the hippie vines design being strong.
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Old 11-23-2019, 03:09 PM   #6 (permalink)
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Are they trolling?

I'm not doubting that shit can be super strong in the right applications, but I don't see the hippie vines design being strong.
I'm with you on this. The "rod beam" design between the big and little ends looks like some kind of joke.
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Old 11-23-2019, 03:16 PM   #7 (permalink)
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that web will hold a bunch of oil, negating any weight savings, must be a troll
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Old 11-23-2019, 03:31 PM   #8 (permalink)
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May be some funny-focus technique, but those look RC scale.

And the curved vines are arty crap.

Bogus.

But I also am excited to new technologies.
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Old 11-23-2019, 03:36 PM   #9 (permalink)
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I'm sure it's strong enough (by material) ... but that webbing will (IMO) whip the oil into foam.
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Old 11-23-2019, 03:38 PM   #10 (permalink)
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I think there will be issues with harmonics and with them going out of balance from oil and sludge sticking to them. But if they work it will be great.
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Old 11-23-2019, 03:38 PM   #11 (permalink)
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Yeah, bullshit
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And a "stress analysis" that looks to me like a Photoshop color gradient. Straight rainbow lines, not following the shape at all.
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Old 11-23-2019, 03:43 PM   #12 (permalink)
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You will be amazed what they make out of carbon fibre.

https://awacomposites.com/products/
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Old 11-23-2019, 03:46 PM   #13 (permalink)
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Yeah, bullshit
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And a "stress analysis" that looks to me like a Photoshop color gradient. Straight rainbow lines, not following the shape at all.
Well...I don't doubt that it was the output from 'something', but it certainly looks like a weird load scenario. I'm having a hard time thinking of what position or function in the crankshaft cycle would load the top part of the wrist pin hole and deflect like that.
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Old 11-23-2019, 03:55 PM   #14 (permalink)
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Would rather run my crower titanium billet rods, light and strong.

Built a BLOWN BBC engine back in the mid 1990's have over 25K into that motor.
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Old 11-23-2019, 03:59 PM   #15 (permalink)
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Would rather run my crower titanium billet rods, light and strong.

Built a BLOWN BBC engine back in the mid 1990's have over 25K into that motor.
Yeah I'm sure you have blown a lot of BBC in your lifetime.
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Old 11-23-2019, 03:59 PM   #16 (permalink)
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Yeah, bullshit
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And a "stress analysis" that looks to me like a Photoshop color gradient. Straight rainbow lines, not following the shape at all.
Connecting rods are funny things. We used oem GM rods that would handle pretty high HP but were to be thrown away if dropped from 3-4 feet.
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Old 11-23-2019, 04:01 PM   #17 (permalink)
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Well...I don't doubt that it was the output from 'something', but it certainly looks like a weird load scenario. I'm having a hard time thinking of what position or function in the crankshaft cycle would load the top part of the wrist pin hole and deflect like that.
They obviously have a 3d model, and printed some stuff, but that's just a model with a gradient painted on it.


Notice how in real FEA, the stresses follow the structure of the part, not just "one end's red and the other's blue"?

(Disclaimer- I'm an internet smartass, who wouldn't even know what program to do FEA in. I can smell BS, though)
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Old 11-23-2019, 04:02 PM   #18 (permalink)
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Built a BLOWN BBC engine back in the mid 1990's have over 25K into that motor.
And now a junkyard 200k mile lq9 with Alibaba turbo will smoke its ass.
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Old 11-23-2019, 04:04 PM   #19 (permalink)
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BLOWN BBC
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waaait a minute..
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Old 11-23-2019, 04:07 PM   #20 (permalink)
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waaait a minute..

This place...
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Old 11-23-2019, 04:21 PM   #21 (permalink)
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Quote:
Originally Posted by Subybaja View Post
They obviously have a 3d model, and printed some stuff, but that's just a model with a gradient painted on it.


Notice how in real FEA, the stresses follow the structure of the part, not just "one end's red and the other's blue"?

(Disclaimer- I'm an internet smartass, who wouldn't even know what program to do FEA in. I can smell BS, though)
Not quite...it was a load case, there's a kPa stress scale and you can see the deflection due to loading (look at the wireframe outline behind the part for initial condition), it's just a weird scenario to me *because* the load distribution doesn't match what I'd expect to see in a connecting rod. Maybe they just pinned the rod bearing end and bent the top bit to get a fancy picture, I dunno, but it's definitely not something you'd see in an engine running normally.
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Old 11-23-2019, 04:46 PM   #22 (permalink)
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Wouldn't the load causing that bending make the small end show stress at the bottom, not the left side? Even if they grabbed a point to drag on rather than simulating a pin in the hole...

And the magic vines distribute stress so evenly that it's a smooth diagonal band, rather than top and bottom under tension and compression? Hrm.

WWOccamD?
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Old 11-23-2019, 04:46 PM   #23 (permalink)
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And now a junkyard 200k mile lq9 with Alibaba turbo will smoke its ass.



Alibaba turbo
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Old 11-23-2019, 04:51 PM   #24 (permalink)
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Those rods have been discussed on several car forums populated by professional race car builders... It's bullshit....
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Old 11-23-2019, 04:57 PM   #25 (permalink)
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Quote:
Originally Posted by Subybaja View Post
Wouldn't the load causing that bending make the small end show stress at the bottom, not the left side? Even if they grabbed a point to drag on rather than simulating a pin in the hole...

And the magic vines distribute stress so evenly that it's a smooth diagonal band, rather than top and bottom under tension and compression? Hrm.

WWOccamD?
OK - point of clarification. I went and looked at the full-size image

The gradient is showing deflection, not stress. What you're looking at is deviation from point of origin, so the red part is not the most 'stressed', it's the most deflected as a result of where the force is applied.

In this case they're claiming a maximum deflection of 0.7mm. I don't know the context of that (presumably you'd have some support from the cylinder wall/piston skirt), but I'd guess they're modeling it from a point where the combustion force isn't linear (somewhere mid power stroke) and that's how the rod will bend under power. How much power, who knows.

But I think we're clear on the image now anyway
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