Topic: Torque specs for tunnel panel - installing DDM Backbone

[numba41]

Anyone know the torque specs for the tunnel panel bolts?  I'm installing the DDM Backbone.  Thanks.

[Helios]

Use blue loctite and torque to 15ft-lbs.

[Sly Bob]

The OEM spec was 11 ft-lbs. There was a discussion some time ago in this thread. I did mine to 11.

http://www.kappaperformance.com/forum/index.php?topic=189.msg11368#msg11368

[TomatoSoup]

The OEM spec was 11 ft-lbs. There was a discussion some time ago in this thread. I did mine to 11.

Yeah.  Basically finger-tight!

[Kuprito]

I think the backbone should include larger bolts.

[Sol Asylum]

Using longer bolts will not change the torque.

[Kuprito]

1/2" outer the thread (xtreme backbone thick) means less tight...

[Kuprito]

3 year old drawing...

[elff]

Does that picture end with the kid telling the pilot to
NOT F-UP the landing?

[Dave@DDMworks]

1/2" outer the thread (xtreme backbone thick) means less tight...

The 1/2" version does come with longer bolts

The 3/8" and 1/4" version do not.

The stock bolts have a little over 1" of thread to them, so with the 1/4" backbone you are engaging 3/4", with the 3/8" version you are engaging 5/8". The standard is to engage 1.5 times the width of the bolt, so since it is a 8mm bolt, you would want to engage atleast 12mm, or roughly 1/2". Since the 1/2" backbone would put it right at that limit we give longer bolts, but the other 2 thickness backbones exceed the standard.

Hope that helps,
Dave

[Helios]

We have been edumatcated (ED-yoo-muh-kated). 

[spider]

They will loosen after a while at 11 ftlbs with the thicker plates. So add some blue locktite rather than over torquing.

[Kuprito]

Stock bolts are 8mm thread and 13mm socket?

Which thread is? m8x ?

[Kuprito]

M8 x 1.25 right?