I thought you guys would like these....enjoy!!! :D :D :D


(droooool)http://www.artex.co.jp/Pages/Car/RX-8/magazine/Image/afTheStage_03_08_01.jpg

http://www.artex.co.jp/Pages/Car/RX-8/magazine/Image/afTheStage_03_08_02.jpg

http://www.artex.co.jp/Pages/Car/RX-8/magazine/Image/CARROAD_03_08_02.jpg

http://www.artex.co.jp/Pages/Car/RX-8/magazine/Image/CARROAD_03_08_01.jpg

http://www.artex.co.jp/Pages/Car/RX-8/magazine/Image/CARBOY_03_07_04.jpg

http://www.artex.co.jp/Pages/Car/RX-8/magazine/Image/CARBOY_03_07_03.jpg

http://www.artex.co.jp/Pages/Car/RX-8/magazine/Image/CARBOY_03_07_06.jpg

http://www.artex.co.jp/Pages/Car/RX-8/magazine/Image/CARBOY_03_07_05.jpg

Why is it human nature that we are attracted to the things we can not have?

That white 8 is just awesome looking, surprisingly even with those white rims... I'm not even a white color car fan.

I think it's the lowered suspesion, there is something else about that white car, can't place my finger on it.

On the 6th page is that a turbo in the middle left pic? :eek:

Also on page 6 -- did that dude just carve a peripheral exhaust port a renesis housing?!!! Wow...they truly waste no time at all!

That does certainly resemble a turbo and it's in the appropriate location:cool:

And the rotor housings are the same as the old motor so they still have the same castings with the peripheral port just waiting to be holed out, I was wondering how long it would take for someone to try it.

Did you see the cut-away of the stock muffler on the 2nd page, that has got to go. I would like to see someone make a new rear spoiler body color with center exit pipes. I think that would be smooth.

Did they get a 12ps increase in power from that exhaust?? Look carefully...

Originally posted by neit_jnf
Did they get a 12ps increase in power from that exhaust?? Look carefully...

Yup, that's the first thing I looked for!

Mmm... Coilovers.. :D

thanks for the nice find! Definately going to look into the RE AMEMIYA exhaust.

ok so +12ps is equal to 12.2 bhp

And that's 12 hp to the wheels eh? 1-2 hp for drivetrain loss? It would be nice to see 30hp come from just a header and exhaust... 280 hp, and more importantly - close to the 10lbs/hp ratio in a normally aspirated engine would be pretty cool.

Hmm, an increase of 12 hp with a cat back exhaust. Is that good? I don't have any basis for comparison. And with that peripheral exhaust they'll need a custom 5-pipe header right? I wonder how will the power change with all those mods...

From my experience with Honda engines, most manufacturer hp claims are NEVER achieved.. but the rotary does respond more favourable to air flow mods.. I guess a 'real' person would have to dyno before and after..

Originally posted by neit_jnf
Hmm, an increase of 12 hp with a cat back exhaust. Is that good? I don't have any basis for comparison. And with that peripheral exhaust they'll need a custom 5-pipe header right? I wonder how will the power change with all those mods...

lets ask Buger! i believe he may have done some calculations on this as he was talking about it months ago!

Originally posted by SPDFRK
That does certainly resemble a turbo and it's in the appropriate location:cool:


You can't tell if it's a turbo or not because it only shows the exhaust manifold.

It'll look a bit longer and different due to 3 ports out of the iron housings instead of 2 ports from the rotor housings (previous generations).

J

HEY GUYS!!!! just watch a Hotversion vol63 on reviewing the Tuned Feed RX8 :D

And compare with Tuned Nissan 350z, Honda Accord Euro R, and Toyota Altezza TRD.

Feed RX8 is the winner in 5 laps :D

The Mazda RX8 has a hidden potential and Feed just unleashed it ;)

Did other cars modify?

Originally posted by Brian_RX
Did other cars modify?
Yes the Nissan is equip with Nismo Exhaust, not sure what suspension it used. The engine is a minor tweak (Boss CPU) i think. The Honda accord Euro R is tweak but unsure what it is. The Toyota Altezza is an TRD version is also tweaked but not sure have to watch it again but it got smoked by three of them :)

Sorry the DVD is only in japanese and no english subtitle so i can't really tell.

This is the list of the car:

Fujita engineering RX8 (Feed) 250ps/1310kg
Power: 5.24kg/ps
Altezza (TRD Democar) 220ps/1360kg
Power: 6.47kg/ps
phase Accord Euro R 228ps/1380kg
power: 6.31kg/ps
K Office Z33 300ps/1440kg
power: 5.14kg/ps

Best time and winner
1st: RX8 1min10sec445 (lap5)
2nd:K office Z33 1min10sec166 (lap5)
3rd: Accord Euro R 1min11sec505 (lap2)
4th: Altezza 1min14sec619 (lap2)

Are MODS deleting posts here too?:confused:

Originally posted by Jt-Imports
Are MODS deleting posts here too?:confused:

Because you are representative for a company, you have to be careful what you say.

You can answer questions about one of your products but you have to be careful not to delibrerately advertise market your product.

I don't know why your post was deleted. I'm just trying to answer your question.

-Mr. Wigggles

Yeah I hear you man, thanks.

I just said I will talk to FEED and RE-Amemiya to see what they are up to in more depth.

Oh well..

I got this DVD as well. I will try and pull some of the footage off tonight and host it on some webspace. for a few days...


-andy-

Originally posted by Jt-Imports
Are MODS deleting posts here too?:confused: If we delete a post or thread because of content, advertising, etc., we will be sending a PM telling you why, and explaining the rules (or a warning if the situation calls for it).

There have been some problems lately where some posts get dropped in the past couple of days. It's happened to me too. So if you haven't gotten a PM from Elara or Toadman or myself about it, the site dropped it.

---jps

cool, fair enough..

nihongo ga wakarimasen

TRANSLATE! :confused:

It doesn't look like they cut peripeheral exhaust ports in the Renesis housings. It looks like they are using some older 13B housings. The give away is the fact that the rotor housing he is holding only has 1 oil metering jet in it instead of the 2 that are in the Renesis housings.

Originally posted by rotarygod
It doesn't look like they cut peripeheral exhaust ports in the Renesis housings.

...that would be rediculous anyways: you wouldn't get nearly any exhaust gas velocity coming out of the engine with about double the volume to fill with those extra two runners.

i think, still, the best solution would be to modify the intermediate housing and run a (rather funky) 4-to-1 header... get rid of that strange siamesing.

Hello, my first post in this forum.

That rotor housing is from 13B used in Luce. Luce was a luxury sedan sold in Japan. A.K.A. 929 in U.S.

RENESIS has corner seals on Rotor housing, making it difficult to use housings from FC and FD. Fujita-Eng used rotor housing from old 13b used for Luce, which had corner seals on Rotor Housing.

At least that's what the article said.

BTW, I can read and write Japanese. I should, since I'm from there.

This forum is awesome! I'm planning on buying RX-8 soon. Already had 2 test drives!
As an ex-owner of '91 FC turbo, I am so happy to be able to buy a brand new Rotary from Mazda.

You mean water seals not corner seals on the rotor housings.

Wakeech you're a technical guy and may be interested in this. At the very least I'd like your feedback. There are a couple of ways to do a proper exhaust. I agree that a completely seperate center pair of ports would be best but there is another way to simulate this. It is a design that used to be used on old 4 cylinder engines that would siamese the runners of the center 2 cylinders. I can only speculate that it will or will not work but will try it when I get my car. The 2 outer ports would have their runner collect together at a point that is as of yet unspecified in length. The center runner would collect later downstream at a distance 3 times that of the first collector distance. Immediately after the port exit on the center runner we branch off to a dummy leg of equal length to the outer ports. This pipe just deadends to nowhere. the end is blocked. This may be a little hard to visualize. The dead length pipe resonates at the same frequency as the outer runners but affects the third longer length in that all pulses will be of equal intensity and frequency at the final collection point which would appear to the engine as having 4 equal length pipes. You really need to pull out the old books to see a good example of one but the priniciple seems very sound according to all of my technical sources. It would be a fun experiment never the less and doesn't require pulling out the engine to make the mods.

Originally posted by rotarygod
The 2 outer ports would have their runner collect together at a point that is as of yet unspecified in length. The center runner would collect later downstream at a distance 3 times that of the first collector distance. Immediately after the port exit on the center runner we branch off to a dummy leg of equal length to the outer ports. This pipe just deadends to nowhere. the end is blocked. The dead length pipe resonates at the same frequency as the outer runners but affects the third longer length in that all pulses will be of equal intensity and frequency at the final collection point which would appear to the engine as having 4 equal length pipes.

yeah, you mentioned the "3 times the length" before... so two collector points, and one helluva HUGE header... hmmmmm... it'd be heavier, large, but yeah, probably the best way to deal with the intermediate port for your average road using peformance enthusiast.
the trickiest bit will to find a way to get all of the length of the central runner to FIT inside the engine bay (and still have it collect with the others before the cat)... probably will have to go F1 "mess of spaghetti" style... it'll look great though. the capped runner is brilliant (F20C stock manifold uses this device, i believe), but every know-it-all rice tuner will break out the word "flow" and ignorance will ensue. *rolleyes*

extremely cool info rotarygod... think that your manifold design would bring the torque peak somewhere around 8500 - 9000 rpm with a little bit of a redline bump on the engine?? ;)

"how high can you go?"

Cool I guess you understood what I was taliking about. I knew you would!

The peak power point is going to be determined (obviously) by the collector points distance wise from the engine. Since I haven't built one yet and haven't dynoed one, I can't say if it will be feasible in the length available before the cat. I don't think it will be that hard to fit in never the less since the dead pipe can go anywhere it can fit. I don't want the 3 pipes to collect at the same spot. I want the center one to run parallel to the other already collected point until it gets to the proper distance. The first one I try will just collect this pipe immediately before the cat and have the others collect at a point 1/3 the distance just to see if there is promise. I'll worry about tuning it after the initial testing is done. I'll probably find a way to make the first one adjustable with inserts until I find the right length. I may even experiment eith moving the cat slightly back although the decreased amount of heat may really mess things up. If I don't move it more than about a foot then there shouldn't be much problem. Only time will tell. Maybe this won't work at all.

2 things.

1. that looks like a gsl-se rotor housing to me

2. the rx8 header, you could do something like a tri y setup

mike

Damn Mike you're everywhere!

The header design I'm talking about is more or less a Tri-Y setup that also adds a dead leg to the center, longer pipe.

I know Paul Yaw is on this forum. I'd love to hear his opinion. If he says it will or won't work, I'll believe him.

Originally posted by rotarygod
The peak power point is going to be determined (obviously) by the collector points distance wise from the engine.

oh, i was just nudging at you to do some very rough math, see how long this long-ass header will be in the end... and the additional benefit of a high power, high rpm torque motor: the header is smaller ;)

Originally posted by rotarygod
I don't want the 3 pipes to collect at the same spot. I want the center one to run parallel to the other already collected point until it gets to the proper distance.

yeah, but just thinking to myself how long that might be (maybe 35 - 40") i'm just uneasy about the amount of room... with a loop-the-loop (yeah, i mean in a radius-as-large-as-possible way) you could me sure to get all of the pipe in there, and collected, before the cat... but yeah, haha... we don't know yet!!

Originally posted by rotarygod
I may even experiment eith moving the cat slightly back although the decreased amount of heat may really mess things up.

i doubt that once the engine and cat are all warmed up that there will be much of an appreciable difference in the sustained temp in the cat if you move it back an inch or two (you'll just have the EPA or whatever on your ass...). startup would be affected, but normal running would probably be fine.

Originally posted by rotarygod
If I don't move it more than about a foot then there shouldn't be much problem.

...glad to see you agree. :)

Originally posted by rotarygod
I know Paul Yaw is on this forum. I'd love to hear his opinion.

PM yawpower and ask him. :) i know he wouldn't mind. (FWIW, he's using the STOCK log in the race car, as of yet).

PM'd him and he replied. Good ol' reliable Paul! He said that the Renesis seems insensitive to exhaust tuning so far. That's dissappointing. I had always suspected that it would be 'less sensitive' than the peripheral layout but never thought I'd hear the word, 'insensitive'. Hmmm... Kind of makes you wonder?...

Originally posted by rotarygod
He said that the Renesis seems insensitive to exhaust tuning so far. That's dissappointing. I had always suspected that it would be 'less sensitive' than the peripheral layout but never thought I'd hear the word, 'insensitive'. Hmmm... Kind of makes you wonder?...

:eek: holy christ... hmmmmmmmmmmmmmmmmmmmmmmmmm... ("kind of" is an enormous understatement)... jeez, i wish we could see data of what the real pulse pressures and overlaps are...

also of note: Paul hasn't changed the porting of the engine at all (he can't), which is where any serious tuner will pick up the most ponies for sure (yes, even the turbo guys have to port well to optimize), and which will influence the pulse patterns and possibly the "sensitivity" to tuning.

i dont know really anything about rotory motors but i was woundreing is the reason the housing they used have only one oil port instead of two because with one oil port there is a factional less amount of oil in the motor so more fuel and air can be added....even though its a fraction amount just 10hp on a car wieghing in at about 3000lbs would be like a 20hp to a 3600lbs...not exactly 20hp but just rounding up

The current housings have 2 oil injectors per rotor strategically placed to help more evenly lubricate all of the engines seals. The older rotary engines (pre-93) used to have 1 in the center on the rotor housing and another one on the lower intake manifold where it could mix with gas before entering the combustion chamber. The 3rd gen RX-7 only had 1 per rotor because Mazda claimed that the surface cotaing on the rotor housings was slippery enough that less oil could be used. Obviously they have changed their minds. It wasn't because of power though.

You guys know about the headers RE-Amemiya are about to release?

JT

So far testing has shown that new exhaust headers aren't doing anything.

On whos headers? Where are the test results?

Also to rephrase my question, You guys know about the headers RE-Amemiya are about to release?