RX7Club.com - Mazda RX7 Forum

RX7Club.com - Mazda RX7 Forum (https://www.rx7club.com/)
-   General Rotary Tech Support (https://www.rx7club.com/general-rotary-tech-support-11/)
-   -   P port question (https://www.rx7club.com/general-rotary-tech-support-11/p-port-question-971997/)

Superrican 10-04-11 02:56 AM

P port question
 
just came across a peripheral port that is sideways , not drilled straight through the housings . ive searched but cant find anything ... anybody have pics?? or explain how that works

Dualist 10-04-11 03:45 AM

What like this one....

https://www.rx7club.com/showpost.php...8&postcount=29

nitroracer 10-04-11 08:49 AM

SHHHH....its a secret...

Superrican 10-04-11 08:20 PM

Exactly like that , but how does it work ? It says you can use your stock manifold..

Superrican 10-05-11 03:17 AM

http://i27.photobucket.com/albums/c1...mipportev2.jpg

Superrican 10-05-11 03:19 AM

1 Attachment(s)
retry this pic

Dualist 10-05-11 03:23 AM

Edit, sorry yours are different the the one I linked to.

have you got any more pics of yours.?

SPENT-IT 10-05-11 09:08 AM

1 Attachment(s)
Not mine...but:)

Superrican 10-05-11 03:12 PM

The one I posted seems like its a bridgeport with a semi pport ......i still dont get how the side ports work.... Are they drilled into the stock intakes?

statique 10-05-11 03:40 PM

why doesnt anyone want to talk about this!!!

Dualist 10-05-11 06:38 PM

You need to mod your irons too so that the flow splits off. Hopefully these two pics explain it better.....

http://i775.photobucket.com/albums/y...panker/ppp.jpg

http://i775.photobucket.com/albums/y...anker/ppp1.jpg

statique 10-07-11 05:44 AM

hows the power band? and why arent there more people talking about this?

Ball joint 10-07-11 09:44 AM

I've been reading about rotaries for more then 10 years and this is the first time I've ever seen this. More info would be great.

Ball joint 10-07-11 10:47 AM

According to the guy that did this it was a cheater port that was used to get past racing rules that banned p-ports.

Dualist 10-07-11 10:51 AM


Originally Posted by Ball joint (Post 10815145)
I've been reading about rotaries for more then 10 years and this is the first time I've ever seen this. More info would be great.

Full thread here...
https://www.rx7club.com/nw-rx-7-forum-33/12a-ppp-rebuild-959915/

Dyno sheet here...
https://www.rx7club.com/showpost.php...4&postcount=47

Curve just keeps climbing :D

Superrican 10-07-11 05:38 PM

1 Attachment(s)
i have more questions but maybe this pic , can explain it better

RotaryEvolution 10-07-11 05:49 PM

it just seems the intake manifold would be a restriction, it's overkill compared to a real peripheral port which would give real results.

more work than it's worth unless you simply have not the ability to setup a peripheral manifold.

the dyno sheet is pretty respectable but it's still only going to max out well below 200 wheel horsepower, that isn't really anything noteworthy compared to the amount of fuel that thing is going to suck down and lack of bottom end response. cheater port is about the extent of it, it should add a few more HP but i wouldn't call it a night and day difference, just able to use more of each gear.

statique 10-07-11 07:04 PM

if a monster port works i dont see why this wouldnt be better...i think this would be better that a semi pport...???

j9fd3s 10-08-11 12:36 PM


Originally Posted by Karack (Post 10815692)
it just seems the intake manifold would be a restriction, it's overkill compared to a real peripheral port which would give real results.

yeah a full PP 12A should do 50-60 more RWHP than that.... at about the same rpm

however thinking about it, there are two scenarios where this hybrid port might work, although there are some IF's.

1. IF the ports can stay with a similar area as the full PP but with less overlap, total power SHOULD go up, and it SHOULD be better at lower throttle openings too. the whole problem with a full PP is that to get adequate port area, it adds a ton of overlap. if you can do bigger port area with less overlap its always good.

2. since it uses a normal intake, maybe it'll smog? or maybe if i get pulled over and the cop pops the hood its all stock still?

RotaryEvolution 10-08-11 12:49 PM


Originally Posted by j9fd3s (Post 10816443)
yeah a full PP 12A should do 50-60 more RWHP than that.... at about the same rpm

however thinking about it, there are two scenarios where this hybrid port might work, although there are some IF's.

1. IF the ports can stay with a similar area as the full PP but with less overlap, total power SHOULD go up, and it SHOULD be better at lower throttle openings too. the whole problem with a full PP is that to get adequate port area, it adds a ton of overlap. if you can do bigger port area with less overlap its always good.

2. since it uses a normal intake, maybe it'll smog? or maybe if i get pulled over and the cop pops the hood its all stock still?

i don't know about the smog part...lol

j9fd3s 10-09-11 08:04 PM

me neither, but it could LOOK like it passes


All times are GMT -5. The time now is 02:03 AM.


© 2024 MH Sub I, LLC dba Internet Brands