Connecting Rod Tensile Strength Explained - Quick Tip
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- Опубліковано 11 чер 2023
- Watch this before buying connecting rods 🤔
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The video needs an explanation of how the bolts get loaded during operation. From my understanding, the tensile strength of the bolts is independent of power since the power stroke pushes the rod and therefore isn’t stretching the bolts. They are only put in tension when the crankshaft is pulling the rod and piston down during that cylinder’s intake stroke. Higher rpm leads to higher tensile loads
I also struggle with how Hp is related to this. I really think it’s piston/rod/pin weight and rpm that are the deciding factor of what bolt is needed.
the force that is applied on the power stroke is the direct inverse of the force applied to the other rods on their non-power stroke. So when cyl 1 fires, cyl 2,3, etc all experiece opposite forces from the crank rotating on their bearings.
I agree we definitely could add more to our next video on this topic. We would love to take a trip one day to a manufacturer like ARP to make a more detailed video where we can break down the actual science behind it all. In the meantime, I hope this simple example we used shows a very simplified version so that many people can start to understand :) Thanks for watching!
Dang it!!! Now, I want candy.
Awesome !
Yep. It's just the arp 625+ rod bolts that make the h beam rods hold more abuse.
Ive seen this guy on youtube before!?
625+ equals twizzler.... lol
Great explanation for tensile strength
Glad you liked it
@realstreetperformance the hardest part of explaining anything mechanical is putting it into terms anyone can and will understand, which u nailed here
No, sorry, it's _not_ a great explanation. While the candy demonstration is really good at illustrating the difference, the terminology is lacking.
There are two important tensile properties: the 0.2% yield strength, or 0.2% off-set yield strength, and the ultimate tensile strength or UTS.
Once you exceed the yield stress you introduce permanent deformation. If you stay below yield stress, the material will spring back to its original shape. If you load a material to its 0.2% YS, and you release the stress, it will have permanently deformed by 0.2%. (Hence the 0.2% prefix). Any stress exceeding the 0.2% YS will cause more permanent deformation. The UTS is the stress value at which the material breaks.
(And maybe now it makes sense why torque-to-yield bolts should only be used once!)
ARP 2000 has a 0.2% YS of 200 ksi and an UTS of 220 ksi (or 200.000 psi and 220.000 psi).
Custom Age 625+ has a 0.2% YS of 235 to 255 ksi and an UTS of between 260 and 280 ksi.
So in other words, at the stress level where ARP 2000 hardware will break, an identical sized piece in Custom Age 625+ will not even _begin_ to permanently stretch. The UTS of ARP 2000 is lower than the 0.2% yield strength of 625+.
Where is Jay ?
ARP 2000 rod bolts plenty for street.
How so ? And why is it enough ? What load is the rods under etc how can u calculate how much load rod is under ?
Is weed legal in Florida yet?
Waste of money
Sure. Sub 3 minutes pitch.