Quote:
Originally Posted by 370Fitment
OK so we are not defending anyone or taking any sides!
Just want to put some facts out there for everyone's safety.
Just to state a few reasons why these wheels could have failed. These wheels were refinished multiple times in powder. Not sure if anyone has stripped powder coating but it's not fun. It takes a highly toxic airplane grade acid that burns the sh*t out of you if it comes in contact with the skin. Normally places that powder for profit go the easy route and put a blow torch to the powder making it crack and peal off. In the process of doing this you are heating and reheating a part that is tempered for strength. So the part is no longer 6061-T6 aluminum. Changing the temper on a part usually causes these types of structural failures. (Not saying this is what happen just putting information out there). The point I am trying to get across is; if your tracking your car and want to powder coat your wheels use a low energy powder and a powder coater that is knowledgeable in material handling (Usually the race shops go through this elimination process and know who to use and who not to use). If your just getting your wheels refinished make sure the wheels are going to a place that has the proper facilities to do a chemical strip and that your wheels are not spending an extended period of time in the oven. Stay away from places that use pizza ovens to bake their parts and places that powder steel fences and railings as they don't have the mindset of preserving structural integrity.
What we are posting is based on experience. We are not talking about a specific wheel brand. This is not isolated to 1 wheel manufacture or car. Even tested wheels will fail if not handled properly. We spend a lot of time on the track and this is knowledge we have accumulated through testing and experience.
Hope this helps!
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Especially if the part is not stress relieved afterwards to bring it back to T62 condition. Then you have stress concentrations as parts of the metal grain get warped and distorted by heat.
Finally, some technical knowhow in the technical forum