The Brembo calipers on my track car are held on by a pair of socket headed cap screws. There are are no torque tightening specs provided for this car. The fronts are 13mm x 1.25 pitch with about 1" of thread going into an aluminum mount. The rears are 10mm x 1.5 pitch with about 3/4-1" of thread into an aluminum mount as well. So that I don't damage the mounts can someone point me to a website that will let me determine the maximum torque that can safely be applied? Thanks Bob S.
Bob, I'd reco also using some Locktit blue on those bolts so that you're not just relying upon a torque setting to keep the bolts in place....
Yes is always do that and there are hardened serrated washers as well I just can't find the spec right now so I thought go back to basics and find out what aluminum should be able to take. Of course I don't know for certain which alloy was used but I'll bet it's a tab better than recycled beer cans. Bob S.
Bob, Do a google search on "cap screw into aluminum torque specifications". While I did not find a table directly answering your question, I found some interesting points. One being that the torque should be about 30% less than screwing into steel. There also some specs on thickness of the aluminum. Dry vr. wet torque differences are also give. I'm sure the answer is out there, it will just need some extraction.
