IRS Knuckle Torque Values

[cv2065]

Just checking to see what others have used for these torque values (upper/lower/toe to knuckle). I didn't note in my last build thread and for some reason the manual doesn't list torque values in the knuckle section of installation. M16 is listed as 120 ft/lbs, but seems excessive with the FFR recommending 100 ft/lbs for the IRS mounting bolts.

[BUDFIVE]

Rev 5 G of the build manual has the following IRS torque value table
193189

[cv2065]

Thanks Bud. I didn't see that in mine. What page is that on?

[CraigS]

The center section to frame TQ specs are suspect to me. Pretty sure the rear bolts are 14mm threading into aluminum while the fronts are 16mm threading into a steel nut.

[cv2065]

The center section to frame TQ specs are suspect to me. Pretty sure the rear bolts are 14mm threading into aluminum while the fronts are 16mm threading into a steel nut.

I was thinking the same thing Craig, especially the 14MM going into the aluminum. I kept it at 100 ft/lbs but checked with FFR to see what they say.

[BUDFIVE]

That table is on page 117 with the rear alignment specs. Its after the IRS shock install and Wilwood brake pages so not obvious.

[cv2065]

That table is on page 117 with the rear alignment specs. Its after the IRS shock install and Wilwood brake pages so not obvious.

I see it now. Thanks for that!

[cv2065]

I was thinking the same thing Craig, especially the 14MM going into the aluminum. I kept it at 100 ft/lbs but checked with FFR to see what they say.

As a follow up, Dan from FFR tech came back and stated that the 100 ft/lbs for the IRS Center section mounting, front and back was correct.

[CraigS]

I sure wish they would get this straightened out. Way too many threads about FFR TQ specs for me. I have been working on cars all my life, 30 years or so being paid for it. So stuff sticks out to me that someone w/o that experience may not notice. 129# for a 14mm going into aluminum is crazy.

[cv2065]

I sure wish they would get this straightened out. Way too many threads about FFR TQ specs for me. I have been working on cars all my life, 30 years or so being paid for it. So stuff sticks out to me that someone w/o that experience may not notice. 129# for a 14mm going into aluminum is crazy.

I agree. I'm not sure why this is so hard. The manual was just updated.

[scrubs]

I agree. I'm not sure why this is so hard. The manual was just updated.

Until consumers demand greater accountability, why would they care?