12A vs 13B
#1
Keep Your Stinky Pistons
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12A vs 13B
hey guys i have a lil question... it there much differance between a 12A and a 13B? i mean, im very new to the whole rotory thing. and iknow there r differances... but and at my local junkyard theres a 12A sitting in the back room.... he wants 150 bucks for it (i dont think he knows wut it is)... now i was thinking, i know its not a 13B, but if i were to buy it, and pull it apart, are the internal workings close enough to a 13B that i would learn something bout my own motor? Or is a 12A so completely differant from a 13B that it would just be a waste of my time?
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#12
Old Fart Young at Heart
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The ports are the intake ports. In the US all rotarys had 4 ports until the introduction of the 84/5 FI 13B that came in the Gsl-SEs. From then on, all NA 13Bs were 6-ports and the turbos were 4-ports. The extra 2 ports are in the secondaries and opened up around 3800 rpm. The early 13Bs, 74-78 were 4-ports.
The European market got a 12A 6-port, but the secondary ports were butterflys while the 13Bs have a rotating sleeve.
The general configuration of the internals are nearly identical between the 12As and 13Bs. If you can build one, you can build the other
The Renesis, very early 12A/Bs and 10As are not included in my list as they are a bit different.
The European market got a 12A 6-port, but the secondary ports were butterflys while the 13Bs have a rotating sleeve.
The general configuration of the internals are nearly identical between the 12As and 13Bs. If you can build one, you can build the other
The Renesis, very early 12A/Bs and 10As are not included in my list as they are a bit different.
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