Quote:
Originally Posted by NISFAN
BMW stopped fitting CF shafts on OPF cars. Why? Because the CF shaft is a larger diameter than the steel version (less air gap to shields). The OPF is also a larger diameter than the old 2ndary cats (less air gap to shield from heat source).....and the OPF gets hot, very hot, above 600 Celsius when regenerating. CF is a super strong material with one weakness, heat. Put the combo together and you have problem.
|
Thanks for this commentary. Since I'm in the US, it's not something I'm familiar with, the OPF fun.
I will say that since they haven't designed it yet, we can share these notes for them for their consideration. Perhaps the diameter can be kept the same and not large like the OEM one. Heat wrap around certain areas on the exhaust could also help cut down the on the heat.