ARP Lube application question.

[curt-s]

Also of note is which rods because torque and stretch values are determined by the rod manufacturer not ARP themselves. Many/most will indicate to use torque or stretch methods but not both at the same time.

 

[CanamDean]

Also of note is which rods because torque and stretch values are determined by the rod manufacturer not ARP themselves. Many/most will indicate to use torque or stretch methods but not both at the same time.

You absolutely need both unless you believe that ARP is incapable of manufacturing a bolt that misses heat treatment specifications.

You absolutely need both unless you believe that ARP is incapable of manufacturing a bolt that misses heat treatment specifications.

I had this exact conversation with an
ARP “ engineer “. Imagine a bolt that misses heat treat. You could reach the stretch at 5 lbs of torque. The same bolt with excessive heat treat could snap in half without reaching anything close to the specified stretch.

 

[curt-s]

Alright, just saying that if you had a set of Eagle rods and they failed.. when you would be talking to the warranty department and they asked how you set torque on them and you replied "I did by both torque and stretch methods", your warranty would be void.

I'm not arguing with your accuracy just calling out the difficulties which could be faced depending on what you do and what you say.

 

[CanamDean]

Alright, just saying that if you had a set of Eagle rods and they failed.. when you would be talking to the warranty department and they asked how you set torque on them and you replied "I did by both torque and stretch methods", your warranty would be void.

I'm not arguing with your accuracy just calling out the difficulties which could be faced depending on what you do and what you say.

You seem to miss the point. You can verify the proper manufacture of the fasteners using both.

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I built this F1 engine 10 years ago. I understand what matters.

 

[curt-s]