I am having a 13B Extend Port built and I provided my engine builder with some stationary gears. He advised me that stationary gears come in three different offsets (A B and C), Cs can operate with any rotor and As and Bs are specific to the rotors they are designed for. Can Anyone confirm this?? Also is there a way to ID which type of stat gears I have (S4 13B six port - 20mm teeth) and if they are suited to my rotors (also s4 13B sixport but a different engine).



Cheers



Nick

mazda lists 1 part number for the stationary gears from 74-88 for a 13b. 89-91 is hardened and the 92-03 gears take a larger thrust bearing.



i just went and looked at a couple of my gears and none of them are stamped

Yeah i know there is only one part number, hypothectically this could be because they only retail C type gears as they match any rotors. But im starting to doubt there is such a thing as A B C gears.



If anyone has ever heard of this please shine some light our ways!

i happened to run across this in the r100 shop manual. if you were building a 10a you should ba matching these up, but you're not so dont worry about it

89-91 stats are hardened? Both N/A and TII?

Yes. Everything from 89 and up is hardened.



B

Thanks for the replies, I think (hope) my engine builder is just really old school and that is where he has got this idea from.



Has anyone else come across this by any chance??