First, right off the bat, let me say that this is NOT a "How much is this worth?" thread. I am not, at this time, looking to sell them or determine value. Do not tell me to post in the classifieds.


Ok, I have a low compression 85 13b in my basement, collecting dust and staining my floor. I was thinking about parting it out, primarily the 3mm rotors. Is interest for these, or do people prefer milled 2nd gen rotors, due to weight?

I read somewhere that you need the counterweights as well. Is this front and rear, or just heresay?

 

** Is there any*** I usually catch that stuff.

Anyway, nobody even has an opinion?

 

front and rear rotating masses need to move to the new motor with the rotors

if your donor is a manual,, this includes the entire flywheel
and this makes the early rotors a tight fit in later housings at high rpms
the rotor housing inside dimensions change almost imperceptibly tighter between 1985 and 1986
and thus the rotors may require light clearancing on the face if you intend to push 8500 + rpms

i have the pictures ( and housings ) to back that statement up
JHB were very correct when they warned people of the trochoid dimension changes

NB
if you use rx4 1757 front mass it will clash in later 6 port engines with the 6 port runner casting underneath the timing cover
if you use the GSL-SE engine front weight instead it is lipped to clear this

 

100% correct.