Building Peripheral Port housings
The problem I see with the screen is it will actually preserve the bubbles in the frothed oil in the void of the screen.
You want a smooth flat sheet for the baffle so that the surface tension draws the oil in each bubble down to the sheet of oil film on the baffle plate as fast as possible so you have more liquid oil and less froth.
You can paint your porous cast oil return surfaces with Glyptal as well to serve the same purpose.
You want a smooth flat sheet for the baffle so that the surface tension draws the oil in each bubble down to the sheet of oil film on the baffle plate as fast as possible so you have more liquid oil and less froth.
You can paint your porous cast oil return surfaces with Glyptal as well to serve the same purpose.
Newbie
Joined: Dec 2008
Posts: 1
Likes: 0
From: Malaysia
DelSlow,
referred to the photo above, the front rotor is exactly at it's TDC? is the e-shaft's lobe at it's highest point pushing toward front rotor when it is on TDC?
i am having problem finding true TDC without gettting the engine dismantled
referred to the photo above, the front rotor is exactly at it's TDC? is the e-shaft's lobe at it's highest point pushing toward front rotor when it is on TDC?
i am having problem finding true TDC without gettting the engine dismantled
Junior Member
Joined: Dec 2009
Posts: 14
Likes: 0
From: Puerto Rico
There is a huge debate over if it's necessary or not.
Most AUS/NZ rotary builders will swear upon it.
Most NA/PR rotary builders don't do it.
I'm not sure what that tells you though...
I know some rotary shops have given gurantees on their modified engines they sell to people that if they break from twisting they will replace it for free.
There doesn't seem to be a downside to dowling though (other than the price) so it could be good for a precautionary measure. Or is there a downside I just don't know about?
I've never dowelled a motor before... I've never made the power on a motor to require dowelling (yet
)
Most AUS/NZ rotary builders will swear upon it.
Most NA/PR rotary builders don't do it.
I'm not sure what that tells you though...
I know some rotary shops have given gurantees on their modified engines they sell to people that if they break from twisting they will replace it for free.
There doesn't seem to be a downside to dowling though (other than the price) so it could be good for a precautionary measure. Or is there a downside I just don't know about?
I've never dowelled a motor before... I've never made the power on a motor to require dowelling (yet
)"Most NA/PR rotary builders don't do it."
***how do you know... PR/we were doing it when we started building turbos back in 1982, most of you were not even born yet...
Last edited by Pedro Racing; Jan 27, 2010 at 05:02 AM. Reason: xxx
Exhaust Manifold Leak
Joined: Jun 2005
Posts: 815
Likes: 42
From: western europe
Bringing some new life into this nice topic..
I'm thinkering about making such engine in a year or so.. I have a good 4port rx8 engine, and because it has 10:1 CR and lighter rotors it will be quite good.. engine will get telescopic intake like mazda did for the 787b..
now I could use rx8 rotors in s5 TII engine, or I could use complete rx8 engine with TII rotor housings.. question is, what effect will it have when I both have pheripal and side exh ports?
engine will be for a circuit racing and power band from 6000-9500rpm; need 300hp at least
I'm thinkering about making such engine in a year or so.. I have a good 4port rx8 engine, and because it has 10:1 CR and lighter rotors it will be quite good.. engine will get telescopic intake like mazda did for the 787b..
now I could use rx8 rotors in s5 TII engine, or I could use complete rx8 engine with TII rotor housings.. question is, what effect will it have when I both have pheripal and side exh ports?
engine will be for a circuit racing and power band from 6000-9500rpm; need 300hp at least
Bringing some new life into this nice topic..
I'm thinkering about making such engine in a year or so.. I have a good 4port rx8 engine, and because it has 10:1 CR and lighter rotors it will be quite good.. engine will get telescopic intake like mazda did for the 787b..
now I could use rx8 rotors in s5 TII engine, or I could use complete rx8 engine with TII rotor housings.. question is, what effect will it have when I both have pheripal and side exh ports?
engine will be for a circuit racing and power band from 6000-9500rpm; need 300hp at least
I'm thinkering about making such engine in a year or so.. I have a good 4port rx8 engine, and because it has 10:1 CR and lighter rotors it will be quite good.. engine will get telescopic intake like mazda did for the 787b..
now I could use rx8 rotors in s5 TII engine, or I could use complete rx8 engine with TII rotor housings.. question is, what effect will it have when I both have pheripal and side exh ports?
engine will be for a circuit racing and power band from 6000-9500rpm; need 300hp at least
I dont think you're power band will start till about 7K or above, even with fuel injection. But it should definetly make more then 300hp.
Exhaust Manifold Leak
Joined: Jun 2005
Posts: 815
Likes: 42
From: western europe
If I look at the lemans engine they had quite good torque at 6000 rpm (around 300Nm for 2 rotor equivalent).. I will try to keep overlap as low as possible by making it almost D shaped port (flat side on the bottom offcourse), offcourse most of the torque lies in the resosnace tuning of the intake manifold, but it will be quite straightforward to control the trumpets by PWM signal with the microtech I'll use..
Unless the exh velocity will be too low to start comin in the powerband at reasonable rpm due the huge port area with both pheripal and side ports
Unless the exh velocity will be too low to start comin in the powerband at reasonable rpm due the huge port area with both pheripal and side ports
Bringing some new life into this nice topic..
I'm thinkering about making such engine in a year or so.. I have a good 4port rx8 engine, and because it has 10:1 CR and lighter rotors it will be quite good.. engine will get telescopic intake like mazda did for the 787b..
now I could use rx8 rotors in s5 TII engine, or I could use complete rx8 engine with TII rotor housings.. question is, what effect will it have when I both have pheripal and side exh ports?
engine will be for a circuit racing and power band from 6000-9500rpm; need 300hp at least
I'm thinkering about making such engine in a year or so.. I have a good 4port rx8 engine, and because it has 10:1 CR and lighter rotors it will be quite good.. engine will get telescopic intake like mazda did for the 787b..
now I could use rx8 rotors in s5 TII engine, or I could use complete rx8 engine with TII rotor housings.. question is, what effect will it have when I both have pheripal and side exh ports?
engine will be for a circuit racing and power band from 6000-9500rpm; need 300hp at least
Banned. I got OWNED!!!
Joined: Aug 2009
Posts: 297
Likes: 0
From: Chicago,IL
Exhaust Manifold Leak
Joined: Jun 2005
Posts: 815
Likes: 42
From: western europe
Here's the dyno sheet of the p-port renisis,although some people bitch about the H.P but keep in mind that the power band almost peaks a 7200rpm. which is great for reliability compared to a regular p-port engine that has to rev at close to 10,000rpm's for that same power band.
Probaly just end up using the renesis rotors in the S5 engine..
I also looked on rotary aviation but couldn't find the dyno mentioned :/
might make close to 300hp with a shorter intake at higher rpm.. advantage is that yoo can have diff lengths for the runners for side and peripheral exh boards to widen de powerband a bit more
Probaly just end up using the renesis rotors in the S5 engine..
I also looked on rotary aviation but couldn't find the dyno mentioned :/
Probaly just end up using the renesis rotors in the S5 engine..
I also looked on rotary aviation but couldn't find the dyno mentioned :/
A variable runner intake will help but most people are to lazy, to obsessed with peak HP or to obsessed with weight to make one.
Side ports only
Banned. I got OWNED!!!
Joined: Aug 2009
Posts: 297
Likes: 0
From: Chicago,IL
I'm having trouble reading what you said but if i understand you, If you add peripheral exhaust it will no longer have the low overlap that makes it have a low redline. If you are not talking about adding PPort exhaust, the exhaust runners are so shitty that changing exhaust tuning has almost no change in power.
A variable runner intake will help but most people are to lazy, to obsessed with peak HP or to obsessed with weight to make one.
Side ports only
A variable runner intake will help but most people are to lazy, to obsessed with peak HP or to obsessed with weight to make one.
Side ports only
Not sober enough for me to answer
I agree that with this kind of setup,a variable intake runner efi intake would increase the power band by 20 to 40 hp?? more than whats on this dyno chart.
But the side exhaust port could use a little work,ie ported for a smooth transition or port it for an early opening.there is about 1 inch of port material that that can be ported downward for an early opening, you do that plus the intake that you have just described,should yield you about same h.p as regular p-port but more reliably..
Full Member
Joined: Sep 2010
Posts: 141
Likes: 1
From: palmdale
what was the weight of the rx3 with driver just curious i have a first gen drag car pport g-force trans and chevy 12bolt rear end best time 10.48 at 126mph and it has carb on it trying to get the car in the nine second zone i am in ca name eric darby second fastest all motor rotary in ca
Thread
Thread Starter
Forum
Replies
Last Post
Skeese
Adaptronic Engine Mgmt - AUS
65
Mar 28, 2017 03:30 PM
whizzybang
Naturally Aspirated Performance Forum
21
Feb 10, 2017 12:08 PM
