Semi Peripheral Port with Primary's Only?
#1
Semi Peripheral Port with Primary's Only?
Wondering if any one has heard of a semi peripheral port only using the primaries? Thinking about making a port in between a full and semi port to compensate for the lack of secondary port. Looking at using a slide throttle for the peripheral ports but combining with the primary to 1 throttlebody. Transition I'm assuming will be tricky but most likely will control via the ecu table.
#3
Rotary Motoring
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The other way to do the same thing would be to fill in the stock 2ndary port and make a waterjacket J-bridge port (a p-port that uses stock runner and enters at the side of the rotor housing instead of the center like a p-port).
This style could use stock intake set-up with dual throttle to do exactly what you want easily.
This style could use stock intake set-up with dual throttle to do exactly what you want easily.
#5
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i have an Rx7 magazine with two NA FD setups in it. well three.
the first is an AR-F car, its running the 9.7 rotors and a bridge port, plus a hundred shot of nitrous. no HP numbers, but its probably 210-220rwhp without the nitrous.
the second is an earlier version of the housings and manifold blueT11 posted. this one has a small PP and uses all four side ports. again no HP quote, but
setup 3 is setup 2 with a turbo, and is over 800ps.
also there was the scoot FD, it used the same or similar semi PP housings and it was ~700ps@20 psi.
the first is an AR-F car, its running the 9.7 rotors and a bridge port, plus a hundred shot of nitrous. no HP numbers, but its probably 210-220rwhp without the nitrous.
the second is an earlier version of the housings and manifold blueT11 posted. this one has a small PP and uses all four side ports. again no HP quote, but
setup 3 is setup 2 with a turbo, and is over 800ps.
also there was the scoot FD, it used the same or similar semi PP housings and it was ~700ps@20 psi.
#6
The General RE
Have you seen the 4 rotor on CLR Motorsports website?
It appears to have side port primaries and very high peripheral port secondaries.
Link to other pics:
Full Race 4R. TURBO
There is also a video series on YouTube documenting the build of a 13B with a similar, but more complicated setup. Here's the link to video 1 if you haven't seen it.
I wonder if the higher port location would provide less overlap and have better idle quality compared to the normal semi p-port location.
It appears to have side port primaries and very high peripheral port secondaries.
Link to other pics:
Full Race 4R. TURBO
There is also a video series on YouTube documenting the build of a 13B with a similar, but more complicated setup. Here's the link to video 1 if you haven't seen it.
I wonder if the higher port location would provide less overlap and have better idle quality compared to the normal semi p-port location.
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#8
The General RE
Well, that endmill chatter scene as the introduction probably wasn't the best production choice, but lf you skip to about the 16 minute mark there's a good open motor view to see the p-port location. The 4 rotor version seems like a more refined iteration of the concept. Both appear to share the same approximate p port location. This port location should provide the same benefits of more flow area and intake duration as a semi p port, but looks like it should have less exhaust/intake overlap. Excessive overlap seems to be the root cause of p port drivability issues, so there may be something to this idea. I'd like to see video of one of these motors running. I also wonder if someone would be able to estimate the port timing from the pictures or video.
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