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-   -   2mm rotors in a pre 86 motor (https://rotarycarclub.com/showthread.php?t=11164)

IH8DSM 04-30-2010 01:44 AM

2mm rotors in a pre 86 motor
 
would it work?

i have a pre 86 4 port motor and im wondering if i can put 2mm rotors or do i have to stick to the 3mm rotors if so why

Buggy 04-30-2010 05:57 AM

Should work just fine. I just did that exact same thing with my Rx-4 engine. I put S5 NA rotors into an early 4 port engine. I did use RB one piece carbon apex seals though, but I'm sure OEM ones would work fine as well. Good luck with your build.

IH8DSM 04-30-2010 10:49 AM

It runs no problems? no start problems or anything

Buggy 04-30-2010 10:57 AM

I'll let you know in a week or two when I get it running. I'm still waiting on the clutch to get here so I can put it all together. I don't forsee any issues with it. The thicker apex seals were used in the older engines just for durability as far as I know.

IH8DSM 04-30-2010 11:13 PM

Ok send me a pm or reply to this gonna start cleaning mine this week

PercentSevenC 05-01-2010 12:13 PM

Yeah, it works just fine. Lots of people do it. Just make sure you use the correct counterweights and everything, and you're good.

IH8DSM 05-01-2010 12:37 PM

excellent means i can have my motor built in a week or so instead of a month thanks for all the help

C. Ludwig 05-01-2010 08:06 PM

Apparently there is a difference in the troichiod shape of the rotor housing between the generations. However, a lot of people have done it with no issues, myself included.

Buggy 05-02-2010 06:48 AM

Quote:

Originally Posted by C. Ludwig (Post 117448)
Apparently there is a difference in the troichiod shape of the rotor housing between the generations. However, a lot of people have done it with no issues, myself included.

Huh, interesting. I wonder what the difference is, and between what models of engines. I should have compared my old school housings with some FC housings I have laying around before I built my engine. It can't be that big of a difference.


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