Originally posted by InitialD
Yes, I talked about it in the engine wars thread but I was actually enquiring if anybody changed the stock bearings in the engines to ceramic ones and noticed any difference...
Because ceramic bearings have the added advantage of being able to spin faster with less resistance and rotating mass?
Cut and paste from Motorman's past post;
Yes I have used them (ceramic bearings) since before boca went public with them. They are excellent and will outlast the rest of the engine. I wish they would let us use them in Roar legal engines as I have toasted a motor or two due to bad bearings myself. The initial cost is neglible nowdays compared to the cost of other RC car parts. If it saves an engine its worth every penny.
PS I have never had or seen one fail, EVER!
So my guess is that they are illegal under ROAR but legal under IFMAR?
Ahhh OK, my bad.
The discussions I've had recently with some bearing people support what Motorman seems to say.
Thay say the main advantage of ceramic balls is the greater load carring capacity since the ceramic balls don't deform significantly. The other advantage has to do with the running of a steel ball in a steel track in a poor lubrication environment - essentally galling.
I find it odd that ROAR found the need to specify bearing types.
It would be beneficial if ROAR revisited their rules, I think.
They were leading the way with a set of rules when IFMAR only had a nonsensical "draft" set of rules. Now IFMAR have finally decided on a decent set, it's about time for ROAR to fall into line.