Multiple Ports on One Housing
 

Does anyone have any experience or knowledge with porting the same housing multiple times?

What do you Mean? If you port it bigger than the new port your screwed, I have ported housing that were previously ported. Of course the new port was bigger than the old one.

Na combining ports on one housing...like bp & pp on one housing

Why?


-Ted

I'm pretty sure that a few have done bridge ported irons with semi PP housings. Try contacting Judge Ito, he was a member here. This would be combo porting not porting multiple times. Now on the other hand like RXspeed said you can enlarge a previous port job to a degree.

Ito is still a member here. His ego has caused HIMSELF to not want to post here anymore.

Just search semi pp.

http://www.rotarycarclub.com/rotary_...hlight=semi+pp

LOL

God Gift unto himself LOL

Just ask him :302:

It is multiple porting, porting a housing more than once on one housing

Going from a mild street to a large street to a bridge is multiple times, all these ports are in the irons / side ports. The peripheral port is in the housing so by having the semi peripheral I would say combo not multiple unless you are just talking about the irons.

BTW google can be your friend or the search feature on the forums.

(Still waiting for an answer to "Why?"...)


-Ted

Same reason anyone does anything to a rota...more power

If you're having to consider a PP with BP then you need to invest in an FI setup. I've heard of 2 rotor FI setups making 800+ HP in drag cars, and I'm sure they're not doing anything like what you're suggesting.

The fuel efficiency and life expectancy of that motor would make it completely useless.

What are the plans for the vehicle, what kind of goals were you looking to achieve. I could be wrong, but I think Ted's question of why is looking for info. That way the members here can better suggest options for you & point you in the right direction.

O in that case, experience & experimentation...I've seen a shop in Japan do what I was asking & I wanted to see if anyone knew somethin similar

Is it a hoyce port , I have heard of it and would like to know what it is.

More power...where?
What kind of racing?

Bridgeporting was invented to get around racing rules back in the day.
With the increase of overlap, you get your +'s and -'s.

Peripheral porting was invented to give you all-out power with all the +'s and -'s of the increased overlap.

There is no advantage to do BOTH unless you're trying to show off.
The PP's are going to require custom work to do as stand-alone induction or if you're trying to incorporate them into an existing side-port intake system.
Both increase overlap significantly.
If you're going to go PP, go big or go home.

I've heard small PP + side port called:
*Combi port
*Combo port
*Mystery port
*Semi PP
With a stockish primary side port + small PP secondary (and sometimes stockish secondary side port), you can stage the PP's to kick in at higher RPM's, which allows you to have a very tame engine at idle and low RPM's but serious power on the top end.

Again, I don't see the logic to BP and PP the motor at the same time...

Hell, just get a T04Z, stand-alone, water injection and crank the boost up for 600hp and call it a day...
(Waits for RICE RACING...)


-Ted

Experience here is free of charge
 

I have said this many times over and will again here. Porting is not needed on 13B turbo engines.

If its N/A then of course you are challenged as to how many oxygen molecules you can aspirate into the engine.

When however you are forcing them into an engine under the effect of a compressor then the simple facts are "porting" any type is just not needed for these motors, unless of course you want an engine that makes LESS mid range power, and is more effected by running any type of normal exhaust system ........ it's all too easy to actually go backwards when porting rather than improving your engine, especially if you want a FAST car and not a DYNO QUEEN.

As Ted said, I run 30+psi, well over 600bhp, and all on a stock std engine (in every way), just with a simple turbo, a ghetto ECU, and allot of colonic irrigation forced into the turbo's anus to keep it all happy :)

I was using comby ports in 1994 or so (need to scan my old pictures!) small PP's, full bridges, J ports, full Peripheral ports, street ports, you name it I have run it................. in my own car near 20 years later I run a stock std port & love it :biggthumpup: And I came across this by a simple re-build I did for a friend in 1998, I remembered that and changed my own mega street port to a stock ported block and its better in every way, let alone the bridges and peripheral combo's, they are all just a waste of time on a turbo equipped car. :uhh:

bahahahahahhahahahaha


-Ted

Japan has trees
Japan has sun
Therefore japan has trees that create shade
Hence, Japan has shady trees and all that goes along with it.

That simple huh, I never heard of that, & I was plannin on runnin a full or semi pp 13bt...what's the flaws w/ that setup, if I jus wanna be where you at w/ 600hp, I wanna make a good 550-600 WHP tho

Nice set up = space shuttle
 

I just came back from a drive this morning. Look I am not an Astronaut but I say driving my car and accelerating down the road in 3rd and 4th gear is like a space shuttle launching.... it is FUCKING IMPRESSIVE and super quick.

I would give you a plasticine clad warranty that if I used your exagerator 3000 dyno shit heaps in USA my car would show you the power you want lol. There is another poster on this site who did dyno his FD3S set up (running same turbo and similar set up) @ 27psi and got 530rwhp (on a low reading dyno according to him) and he traps 140mph in 1/4 mile in a full weight car. It does 100kmh to 200kmh slightly slower than my RX7.

There are lots of people who know how to do this, just you wont find them on the internet, and most don't have inferiority complexes and don't need to show it off to others either (this is not a comment on anyone its just how it is).

I have a 600+rwhp car on my web site, which is off an Australian dyno which would read much lower than an inertia dyno, anyway that cars acceleration compared to my own (non bridge ported car) running a smaller turbo is btw is equal :) :biggthumpup:

For you to have any hope of running the power I use everyday in my RX7 you need an unbelievable chassis (RX7) I use top spec Ohlins shocks (customized by me) and RACE TIRES (I use 18" Toyo R888 275 width) IF you don't have any of that all you will achieve is smoked tires @ 90mph in 3rd gear. My car has so much power that I actually only run 23psi in 2nd gear, 30psi in 3rd gear and 36psi in 4th gear. The need for a bridge port or combi port and or a T51 turbo (I use a T04Z) is not only not needed it not recommended for it WILL make the car slower on the street and not faster at all.

Stock std 13B-REW and WM50 injection :piggy:

You wont beat the mid range punch of a stock port motor and you will never equal the turbo response of a T04Z.

They make more than enough power, you just have to use the turbo the way the rotor god almighty intended and run it at proper boost levels, and that is unlocked by using water injection.

Big ports and bigger turbos are NOT the way to go.

http://www.rotarycarclub.com/rotary_...ad.php?t=14704

^ Read this thread

So to4z, water injection & a good tune on ecu

Yea that shit crazy

honestly not much else is needed at the end of the day.

The runs were on the board about 20 years ago when a Group A Touring Car Ford Sierra RS500 Cosworth 2.0lt could do the Bathurst 1000km race with 680bhp! on a T3/T4 @ 36psi boost (H trim compressor wheel), and only 7000rpm.

We today with our 13B rotaries have another .616lt capacity and a more modern T04Z (full turbine section) and similar boost and you can very easily make 700bhp on this turbo if you know what you are doing and are not a soft cock with boost pressure :)

Well w/ that performance image look into that bullet 6765

Please do.

Take a look at my web site and have a look at how a full bridge port T51 car goes, I spend allot of my time doing analysis on what is actually quick (not only powerful) and you will see the true power band on large turbo's and any type of porting is basically fucked in the real world (let alone a race track).

Lots and lots of people make mistakes and go the wrong way, especially with street cars, you want as wide a power band as is possible, and to make any power you can realistically use you simply need to only wind up the boost, it is the most efficient way to get in the extra oxygen molecules you need into the engine (and thus make power). Porting is NOT the way to do it, neither is it to fit a stupid sized turbo or a horse cock inlet manifold either lol.

Advice is free :)

Aiight thanks for the info...you have any American customers & is pure water better than water/meth/alcohol mix injection?

I believe Peter found that a 50/50 ratio (by weight, not volume) of Distilled Water and Methanol is the best injectant.

I think it's been proven time and again (by idiots who don't realize what they're doing) that if you want to go away from that ratio than it would be better to increase the percentage of water (all the way to 100% water) as opposed to increasing the percentage of methanol or alcohol.

The big thing though, if you have a vehicle tuned with a certain mixture percentage, than it is very important that you maintain that same percentage. I.E ~ Don't have your car tuned with 50/50, then randomly top up with 100% water or 100% methanol. Whatever you map (tune) with, you should drive around with.

Just my $.02