torque spec for conn rods

[mdl247]

like the title says does anyone know what the torque specs are for the conn rods?

 

[mdl247]

bump

 

[JDM Sam]

Use the specs supplied on the rod spec sheet for ARP 2000.
It's a torque and angle method and don't forget to use the oil supplied on the threads.

 

[mdl247]

didn't open anything and i just did and found it thanks sam got everything today been talkin with my friend who is the lead tech at mazda. he did a quick search and before i opened the box couldn't find anything lol

 

[mdl247]

just to make sure sam the main studs that was ordered the box says toyota 4g 16valve main studs, that is the correct one or is it supposed to be mazda specific?

 

[neox.286]

could you by chance put the toque specs from the ARP instructions here? or pm them to me? I wanna double check them since I dont have the paperwork from my rods anymore

 

[mdl247]

bolt type
(3/8x1.500" under head length arp 2000)
3/8x1.600" under head length arp 2000

Head Stamp
(arp 2000)
arp 200

Recommended Strectch
(.055" to .0059")
.0056" to ..0060"

Torque & Angle
(25 ft lbs + 55 deg)
25 ft lbs + 55 deg

 

[mdl247]

Bolt type
(7/16x1.550" under head length arp 2000)
{7/16x1.600" under head length arp 2000}
7/16x1800" under head length arp 200

Head Stamp
(arp 2000)
{arp 2000}
arp 2000

Recommended Stretch
(.0056" to .0060")
{.0060" to .0064"}
.0068" to .0072"

Torque & Angle
(30 ft lbs + 60 deg)
{30 ft lbs + 60 deg}
30 ft lbs + 60 deg

 

[neox.286]

sweet

thanks man!
just in time for rebuilding my motor friday...

 

[mdl247]

no prob

 

[JDM Sam]

Everything is correct. Just use all the torque specs supplied with the parts not the OEM ones. Use 75 ft lbs on the head if you plan on running a lot of boost.

If you use the main studs the main caps require align honing with the studs torqued in place. You are taking a chance if you don't do that.

 

[MSP_4_CODY]

this may sound stupid but what exactly is the angle method? how do you do it?

 

[JDM Sam]

this may sound stupid but what exactly is the angle method? how do you do it?

Let your machine shop assemble it if you don't have the torque angle gauge.


[FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular]Q: Why use torque and angle? [/FONT] [FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular]A: We didn't invent this. It has been used by automobile and diesel manufacturers and in the aerospace industry for many years because it is much more accurate than using torque to tighten bolts. Torque and Angle uses the pitch of the threads as a good, repeatable reference for properly tightening the bolts. For example, if the bolt has a 7/16" 20 threads per inch pitch, then one full (360 degree) turn of the bolt will move the bolt exactly .050" (fifty thousandths of an inch), or 36 degrees of turn will move the bolt exactly .005" (5 thousandths of an inch). We have a specification for Torque and Angle for all of our bolts, no matter their size (5/16", 3/8", 7/16" etc.) and our specs are all derived from the pitch of the specific thread on each size of bolt.

from:
http://www.oliver-rods.com/library/libraryindex.html
[/FONT]

 

[mdl247]

you can chance it and do the educated best guess or there is a specialty tool you use that i know snap on carries but i forgot the product number.
basically you go and torque it to the specified ft lbs then go the additional angle it requires u to.

 

[MSP_4_CODY]

oh ok ya thats what i thought, thanks guys, and i have the angle specs and everything thanks