Were FB's 4 ports or 6 ported engines? or both?

 

The 12a engines are 4port, and are in most 1st gens. There was a 12a 6port, but we didn't get it here in the US. The 13b is a 6port, and is only in the GSL-SE model. Of course that is only for 1st gens, the newer turbo 13b's are 6 port, and the newer NA 13b's are 6 port. There was also a 13b 4 port that was in an older car or two, but I can't remember which one. I think it might have been the RX-3 or -4, and the REPU.

 

the turbo 13B is a 4 port. But thanks for the info on the FB.

 

Yeah, I know they are 4 port, I just typed it wrong. whoops.

 

FC and FD engines are 4 port??

 

N/A FC engines are 6port, Turbo FC engines are 4port. All FD engines are 4 port.

 

yep

 

wow, thats totally new news to me. i never heard that. so what would happen if they had a turbo 6 port? why didnt they?

 

Because on a forced induction engine, the air and fuel in pushed into the engine rather than sucked, so the 6 port design is not needed, and would only hurt flow.