port numbers
Hi
I am new on the site, and new to rotaries; i would like to know how i can find out how ports has the rx7 i wanna get; it will be either a 12a or a 13 b ( without taking apart the engine) thanks |
Welcome to the board. :)
When we refer to port numbers, we are referring to the intake ports. Just locate the intake manifold and look at it. The 4-port engines will have fairly simple manifolds while the 6-port engine manifold are bulky and busy (due to the overall length and auxiliary port actuators). No need to take them apart for that. The 12A is going to likely be a 4 port engine, unless someone built it otherwise or imported a genuine 6 port from Japan. The 13Bs can be either 4- or 6-port, depending on year and application. - pre-Rx7 engine are 4 port - Non-turbo Rx-7 engines are 6 port - Turbo Rx-7 engines are 4 port I'll just throw the MSP (Rx-8/Renesis) in here for the sake of completeness. They can be 4- or 6-port as well, but they are easily identified as they have 4 exhaust ports (though it looks like only 3) in the side housings whereas ALL previous 13Bs had two exhaust ports in the rotor housings themselves. |
Thank you very much , i can now understand, i've seen it on the 13 b engine pics; an interestind debate is which is the best one; i've understood that the 4 ports is better if one wants more bhp, but the 6 has more power stock if i am correct
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Originally Posted by guitariste47
(Post 12314815)
i've understood that the 4 ports is better if one wants more bhp, but the 6 has more power stock if i am correct
For Renesis engines, the simple answer is 6-ports are more powerful. |
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