Alright, what is the difference between a 4-port and a 6-port motor? Well, obviously the number of ports, but is there a big performance difference, and which ones came on which models? The reason I'm asking is the RB Exhaust Port templates are for "All 13B except 6-port". Anyways...yeah...
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That question has been asked before.I think its in the engine building and porting forum.
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4 port == turbo 13b
6 port == NA 13b of course, this means in stock form, people have turbo'd 6 ports and NA'd 4 ports, but thats modded. not sure on performance difference, as far as the end housings go, in stock form the 6 ports have more timing when aux ports are open, so i guess there is potential for more power there if you turbo it, especially with working aux ports it might help low end torque. most people use 4 port motors in their buildups though. |
the 4 port is easier to get power out of.
the 6 ports came in 84-85 gsl-se, and the 86-91na cars. in japan they also had a 6 port 12a for the 81-82 rx7 and 929's. 4 ports came in everything else mike |
4 port 6 port, fuk all that, just go bridge port :yum:
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Bridgeports rule but 6 ports are cool. https://www.nopistons.com/forums/pub...IR#>/boink.gif
http://www.daczone.com/sideplate2.jpg Then there is the 6 port bridge.. The best of both worlds? 6 ports have more intake timing and some pretty decent ports. Bottom end suffers without the sleves, but in stock form a 6 port has more power than a 4 port (N/A Trim). More people modify 4 port engines, doing street ports, bridgeports, etc. |
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