I have just installed my Scat 4340 rods, and was wondering what to torque the cap screws too... I had a hard time finding the proper specs on Arps website.. and scats didnt have them either.. :mad: I have them tightened to 60 ft-lbs right now
Thanks! graemlins/thumbsup.gif
Jason

Have my Eagle ESP's at 67# on my 468 BBC! :cool:

Originally posted by 68SS454:
I have just installed my Scat 4340 rods, and was wondering what to torque the cap screws too... I had a hard time finding the proper specs on Arps website.. and scats didnt have them either.. :mad: I have them tightened to 60 ft-lbs right now
Thanks! graemlins/thumbsup.gif
Jason =
Jason,
I am assuming this is a Rat??
65 with the std bolt & 76 with the ARP 2000 bolt
with ARP lube.
You want to torque, loosen & retorque at least three times.
The recommended method is to stretch them & the spec is .0065.

Originally posted by Wolfplace:
The recommended method is to stretch them & the spec is .0065. [/QB]I`ve always used the 3-4x method also.

But I used a stretch gauge on a set of Oliver I beams for a BBC recently and it took 125lbs!! :eek: to get the .0048-.0055 stretch they called for.
Having never used one prior to this, what`s your take on this Mike?
BTW, I called Oliver when I was at 100lbs and a little concerned, and was told "not a problem just torque them down"

Originally posted by Wolfplace:
Jason,
I am assuming this is a Rat??
65 with the std bolt & 76 with the ARP 2000 bolt
with ARP lube.
You want to torque, loosen & retorque at least three times.
The recommended method is to stretch them & the spec is .0065. [/QB]Yeah, its a rat (496) with the standard arp bolts , thanks for the help graemlins/thumbsup.gif My mind will rest easier tonight graemlins/beers.gif
-Jason

Originally posted by BigRed-L72:
</font><blockquote>quote:</font><hr />Originally posted by Wolfplace:
The recommended method is to stretch them & the spec is .0065. I`ve always used the 3-4x method also.

But I used a stretch gauge on a set of Oliver I beams for a BBC recently and it took 125lbs!! :eek: to get the .0048-.0055 stretch they called for.
Having never used one prior to this, what`s your take on this Mike?
BTW, I called Oliver when I was at 100lbs and a little concerned, and was told "not a problem just torque them down" [/QB]</font>[/QUOTE]=
That's why I use a stretch gauge :D
The Torque number has to be conservative as 80-90% is friction.
I have seen 80+ even with the good lube & more with oil.
I would suggest having your wrench calibrated to be sure it is ok but the stretch or torque angle method doesn't lie as it has nothing to do with friction.

BTW for anyone wondering why you need to torque the same bolt 3-5 times, it is because it changes the surfaces of both where the head sits & the threads & they tend to get "slipperier" & mate much better after being rubbed together a few times & the friction level goes down.

And yes,,, we are still talking about bolts :D :D