NoPistons -Mazda Rx7 & Rx8 Rotary Forum
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NoPistons -Mazda Rx7 & Rx8 Rotary Forum (https://www.nopistons.com/)
-   Rotary Engine Building, Porting & Swaps (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/)
-   -   Rotary Manifold (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/rotary-manifold-25841/)

Dysfnctnl85 09-30-2003 10:29 PM
I'm ignorant, so could someone please explain to me how the manifold works for the 13b? I mean, it's what makes the engine so recognizable, but how does it work...there are like two ports/tracts/whatever you call them for each rotor, or something... https://www.nopistons.com/forums/pub...1047683561.gif

Baldy 10-01-2003 09:34 AM
What exactly are you asking? Like, why is it shaped the way it is? Or how it operates without valves? Or why are there 4 runners for 2 rotors?

vosko 10-01-2003 09:47 AM
talking about intake manifold ?

Dysfnctnl85 10-01-2003 10:25 AM
Originally Posted by Baldy' date='Oct 1 2003, 10:34 AM
What exactly are you asking? Like, why is it shaped the way it is? Or how it operates without valves? Or why are there 4 runners for 2 rotors?
Why are there 4 runners for each rotor?

Dysfnctnl85 10-01-2003 10:25 AM
Originally Posted by vosko' date='Oct 1 2003, 10:47 AM
talking about intake manifold ?
Yeah. My non-rotary-loving friend was wondering how it worked, and I was like, hmm...I don't know!

BigTurbo74 10-01-2003 11:52 AM
just tell him it's a four banger...

Dysfnctnl85 10-01-2003 12:26 PM
Originally Posted by BigTurbo74' date='Oct 1 2003, 12:52 PM
just tell him it's a four banger...
Hah. He drives a 240sx w/ a Blacktop SR20DET.

Baldy 10-01-2003 12:38 PM
Originally Posted by Dysfnctnl85' date='Oct 1 2003, 11:25 AM
Why are there 4 runners for each rotor?
2 runners for each rotor



each rotor has 2 of it's own intake ports, which are situated on either side of the rotor. 1 runner for each intake port.

If I'm wrong, someone please clarify.

Dysfnctnl85 10-01-2003 01:21 PM
Originally Posted by Baldy' date='Oct 1 2003, 01:38 PM
2 runners for each rotor



each rotor has 2 of it's own intake ports, which are situated on either side of the rotor. 1 runner for each intake port.

If I'm wrong, someone please clarify.
So what's with ports opening up at higher rpm?

Leetheslacker 10-01-2003 01:47 PM
Originally Posted by Dysfnctnl85' date='Oct 1 2003, 02:21 PM
[quote name='Baldy' date='Oct 1 2003, 01:38 PM'] 2 runners for each rotor



each rotor has 2 of it's own intake ports, which are situated on either side of the rotor. 1 runner for each intake port.

If I'm wrong, someone please clarify.
So what's with ports opening up at higher rpm? [/quote]

Thats only on 6-port NAs i think.


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