You're right about the rear needle bearings being the weak link. I spoke with a guy from Eaton back in like 99'-00' (Ian or Ed, don't really remember) and was told that the reason for the 14K limit was the needle bearings and the fact that they use grease and not oil for lubrication. I was also told that the dynamic load on the blowers was also the limiting factor. We had one guy that ran I don't remember if it was the Texas Mile or the one out east that is a top speed run. He was in the 120 mph class he ran in 4th gear at 5.5K engine speed and I think his blower speed was around 16K he didn't have a bearing issue he actually had the rotors swell from the heat and when he stopped and shut the car off the rotors seized to the case. Most of the bearing failures I used to see were the Snout bearings, most of the time we replaced the needle bearings at the same time, kinda while your at it thing. The cartridge bearings have a lip of aluminum rolled over the edges to hold them in place. You never want to replace them because re-timing the rotors and gears is a PITA. I did it once to coat them in an epoxy polymide paint that was a really good thick paint and had a hell of a time getting it back together. A company called ESM used to rebuild the cartridges but I am not even sure he's around anymore. Mangnuson made the Magnaport series of blowers and ended up becoming a Eaton certified repair station if I remember correctly.Originally Posted by bandook
Jeff
