Yeah, we played the game of hub hardness, trying to find a happy compromise. Sure we can make our hubs last forever, but the spline shaft gets worn, just like you said. I don't know what QM heat treats theirs to, but with an assembly that light on a four cylinder, it is going to rattle splines out pretty quick. Great for racing, but not really what I would put in a daily driver.

 

Well so this is the latest news.

Quartermasters is thinking about making me what sounds like the same thing they use for thier carbon clutches:


This thing would ride on the input shaft and the clutches would ride on the outside of it. This seems like a great idea which would take alot of the load off the input shaft. It would distribute the load throughout both the outer ring and the inner ring of this hub assembly.

I am very amazed at the service that both Devotuning and Quartermasters is giving me. Granted I havent had great success with Quartermasters yet I am confident that I will. On my friends DSM we just put a Quartermaster twin in it and it finally made a decent pass of 11.2 @ 127.98 on a tiny little 52 lb/min turbo and a horrible launch. These clutches do work well... I just hope i can get my situation fixed soon and try it out again.

ACTMan: What are your thoughts about this center hub idea they want to do on my car? To me it seems like a perfect solution. It may add a slight amount of weight but considering you can get rid of a ton of each clutches weight I think it would be a tiny increase in weight if any. Other than that I cant think of any reason why this is nt a perfect solution and why more companies dont do it this way from the start.

 

It still uses the same center splines so it is not necessarily taking load away from them. They may be able to produce longer splines this way and the splines are all loaded together for both discs which might be what they are thinking. Also it is far easier to swap out for a spare hub than changing discs or sending the discs in to have new hubs riveted in.

 

Well the reason I was thinking this was such a better way to do it is because now the discs have some wear room on the outside splines as well as the inner splines giving it twice the area to disperse the instant load.... obviously they all go to the same place but the hub would be most likely 4-5 times the area. That way each disc isnt pushing on a small 1" section but now they all place the load on a 4-5" section instead. At any rate I just hope it all gets fixed up and it works for at least a year or two