Builders: ARP 3/8 Stretch Guage vs. Torque wrench
#1
Builders: ARP 3/8 Stretch Guage vs. Torque wrench
Well i pulled my CP pistons out of my block because apparently they had a design flaw on the older ones on the intake valve relief, so i brought them down on the side.
Now my question..
Who uses a stretch guage when installing rod bolts and who uses a torque wrench?
I used the moly lube on the ARP 2000 3/8 rod bolts and torqued them to 43 ft lbs with my torque wrench but now i am having second thoughts on using a stretch guage...
What are your thoughts?
Now my question..
Who uses a stretch guage when installing rod bolts and who uses a torque wrench?
I used the moly lube on the ARP 2000 3/8 rod bolts and torqued them to 43 ft lbs with my torque wrench but now i am having second thoughts on using a stretch guage...
What are your thoughts?
#5
Re: Builders: ARP 3/8 Stretch Guage vs. Torque wrench
If you think about it measuring the torque relies on translating rotational force to the force stretching the bolt through the ramp of the bolt threads (holding force). Measuring the stretch of the bolt itself you can calculate the holding force of the bolt directly based on the strength of the steel. There is less room for error measuring the stretch of the bolt, but theoretically you can get the same place either way.
Just make sure to limit the error possible with measuring torque by cleaning the threads and using the recommended lube. Any type of extra friction from dirt and ---- will require more torque to twist the bolt falsely calculating your holding force higher than it is.
Just make sure to limit the error possible with measuring torque by cleaning the threads and using the recommended lube. Any type of extra friction from dirt and ---- will require more torque to twist the bolt falsely calculating your holding force higher than it is.