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4 and 6 port questions

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Old 07-12-07, 09:05 AM
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4 and 6 port questions

ok so after reading for a bit i guess that there are ether 4 or 6 ports in your engine? i was woundering which cars came with 6 ports? and just another random question did any of the gxl come with lsd?
Old 07-12-07, 09:40 AM
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The turbo cars have the 4 ports, and the NA cars came with 6 ports. The 6 ports come on at about 3800 powered from exhaust pressure. a NA with only 4 ports would be terribly slow, so think of the extra two ports as the intake side of vtec, it is just letting more air into the engine.
Old 07-12-07, 09:52 AM
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for S5, the 6 ports come on due to air pump activation, rather than exhaust pressure.
Old 07-12-07, 09:57 AM
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sorry, i am an s4 junkie..
Old 07-12-07, 10:04 AM
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Originally Posted by WadeMCarter
The turbo cars have the 4 ports, and the NA cars came with 6 ports. The 6 ports come on at about 3800 powered from exhaust pressure. a NA with only 4 ports would be terribly slow, so think of the extra two ports as the intake side of vtec, it is just letting more air into the engine.

Sweet! My rotary has V-TEC yo!
Old 07-12-07, 11:24 AM
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exactly.
Old 07-13-07, 05:15 AM
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ok cool i have heard about well um the "rotary vtec" before but thanks guys for putting it in to perspective for me
Old 07-13-07, 08:39 AM
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If you're trying to identify, I'm pretty sure all N/A 13b's were 6 ports, other than the 13b-REWs and the GSL-SE engines. Look for 2 little cans sitting at a 45 degree angle on the lower intake manifold
Old 07-13-07, 01:20 PM
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Gsl-se engines are 6 port. The early rotary Mazdas had 4 port 13bs. All na rx7s 13bs have 6 ports.
Old 07-13-07, 01:27 PM
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Originally Posted by hella24
Gsl-se engines are 6 port. The early rotary Mazdas had 4 port 13bs. All na rx7s 13bs have 6 ports.
I sit corrected. I was under the impression that only the GSL-SEs got 13b's at all. I am obviously wrong.
Old 07-13-07, 01:36 PM
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13b's are a pretty old design. Still golden though.
Old 07-13-07, 02:09 PM
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Gotcha - I just knew that the first gens started out 12a and then went to 13b later - since all the first gen guys salivate over the GSL-SE, I just figured that was when the change happened. 100% my bad.
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