brothervoodoo

keep your skirt on.. just wait for the results.. people just can't stay patient I guess...

Omicron

Yeah yeah yeah, I know. :D

But FYI, Canzoomer just posted GTech times of some runs he made last night, here: https://www.rx8club.com/showthread.p...535#post198535


And his best time was..................drum roll please................

1/4 mile in 13.78 seconds.

T-von

You know I tried to start that topic back in April but didn't get much of a response back then.

https://www.rx8club.com/series-i-tech-garage-22/possible-future-problems-side-exhaust-3763/

rotarygod

Mazda originally tried the side exhaust ports back in the early '70s so don't go thinking it is anything new. Back then the cars were not fuel injected and oil metering was done very differently. A small nozzle in the carb injected oil into the engine but they used much more than we do now. Also remember that oil wasn't as refined (no pun intended) as it is now. The original issue was that carbon deposits would build up inside the engine from the oil and that this carbon would get scraped against the side seals which resulted in their breakage. Also the excess heat on the outer oil control rings on the rotors also caused them to fail prematurely. The seals back then may have been thicker than they are now but they were made out of a weaker material. Back when Mazda was experimenting with side exhaust ports they were still using 6mm carbon apex seals! Current seal material technology, better oil metering ability (less), and the new cutoff seals all make the new side exhaust port configuration possible. Also remember that the side seals used up until the introduction of the Renesis were just a plain rectangular shape if viewed rom their cross section. The new Renesis side seals are wedge shaped across the side section. They are wider at the bottom and get thinner as they enter the rotor. This shape allows constant self cleaning and scraping away of any carbon deposits so they do not lock or break. If Mazda would wise up and use a seperate oil reservoir that uses 2 cycle oil in the oil metering system, we would almost never have carbon buildup. 2 cycle oil likes to burn well when mixed with gas, conventional oils do not. Running lean will not affect the engine in any way until the onset of detonation. The seals have to be able to survive the high heat of these engines and they do. Mazda even admits that the Renesis runs best at much leaner levels than the previous rotaries and if those were nonturbo they loved to be lean.

I can't say I've built engines for 25 years. I've built nothing but rotaries for the past 10 though. And while I don't have a degree in chemistry or physics, I did take a chemistry and a physics course once! I'm actually a real estate agent! Please, please don't go speculating about why Mazda did something without first studying it. THIS is why side exhaust ports were never used and are now! Oh BTW, I did stay at a Holiday Inn Express last night!

1/4 mile in 13.78!!! That rocks! I don't care if it from a g-tec or not. That is still much faster. If he did those recently then it was obviously on very cold ground. Fantastic news.

hogcar

Who said it was new? My take on the whole side exhaust
issue goes like this. Mazda needs a rotary powered sports
car. Power levels are limited in most na engines due to
displacement. A turbo version would satisfy most people's
needs but would be more expensive and most likely less
reliable than a non turbo. The last turbo rotary did not sell
very well in this country for whatever reason.

Mazda decided to go with a na engine the 13b.
Power levels of the old type 13b in na trim would not meet
the levels that would be needed to create excitement for a
NEW car. Porting the side intake and peri exhaust would cause
unacceptable drivability problems mostly due to the inherent
overlap of the exhaust and intake cycles. So how do you
solve the problem... You go with side exhausts ,This allows for
more port area(HP) and still allows for better throtle response
and drivability. It's really hard to have your cake and eat it to
but Mazda has done a great job. What I really would like to see
is more volume either a larger 2 rotor or say a na 3 rotor 12a
using lighter intermediate housing.. Oh yes Ti rotors would
be nice How about a 10,500 redline!!
I usually stay at the Econolodge.

Ike

Oi... him and the other guys getting 13 something times with Gtechs in the stock RX-8s...

StealthTL

iTrader: (1)

Hi, Ike,

How did I know YOU would be the first to criticize a G-Tech result?

S

Omicron

Um, Ike, he's the only one who's gotten anything. A few others have driven with it, but no one has timed it until Canzoomer did last night. AND, these are unofficial results... just something for all the people who have been clamoring for SOME sort of result.

Please don't start another flame war about this, ok? Thanks...

Ike

That's cool, I'll backoff since people did ask for Gtech results but I don't think they meant times and I don't get why they would want them in the first place. Anyhow my lips are sealed on the Gtech results as long as no one tries to represent them as gosphel, which no one has done yet.

Omicron

Thank you.

rotarygod

[QUOTE]Originally posted by hogcar
Who said it was new? My take on the whole side exhaust
issue goes like this. Mazda needs a rotary powered sports
car. Power levels are limited in most na engines due to
displacement. A turbo version would satisfy most people's
needs but would be more expensive and most likely less
reliable than a non turbo. The last turbo rotary did not sell
very well in this country for whatever reason. [QUOTE]

I never said that someone said it was new. It is merely a sentence for the uninformed. Please don't take offense to it. The rest of the first part of that is absolutely true. The last RX-7 along with every other Japanese sports car, was cancelled from the U.S. market due to price. The high price of the Supra, RX-7, 300ZX were in the mid to high 40's. American sports cars with similar horsepower and acceleration numbers could be had for far less money and were out selling their Japanese rivals. The RX-7 wasn't discontiued here due to power. It was due to low demand from overpricing.


The g-tec is a very reliable device. Users aren't. Agreed that they are not the be all end all though.

RX-8 friend

rotarygod, I thought the RX-7 was removed from NA market because of OBDII, which came in 1996. Kind of moot point either way, as it was very expensive too.

racerdave

Rotarygod...

Yeah, I've *love* for Mazda to use a separate 2-cycle-oil system. Throw a little Burris Blend in there, and you'd even get the great castor smell! (without most of the carbon)

mdw33333

I'm going to order canzoomer's stage 1 mod the day after Christmas. Anyone have one on their 8? Let me know what you think, please.

StealthTL

iTrader: (1)

I got the only one in the world, so far.
//{insert 'silly-grin' smilie here}//
I think it's.....nice.
Do a search on my posts for more details.

S

Rx8Freehk

Just a question... I bought my car in Arizona.... and shiped it to germany. Cant i just go to a Mazda dealership out here and get a re-flash on the ECU? Wont this basically acomplish the same thing..... for free?

brothervoodoo

You're probably one of the first in Germany. As for reflash of the ecu you better check what HP Germany's rx-8 is rated. The Japanese have more HP than the US and the US has more HP than UK. You might get reflashed and actually lose power.

Rx8Freehk

ohhhhhhhhhhhhhhhhhhh Never even thought about that!! thanks BVD for the heads up!!

brothervoodoo

BTW, maybe you know this. I was told the RX-8's are not officially available in Germany until Jan 24th. You're going to get attention, for some time to come, from all the Wankel maniacs over there.

I remember when the new model beetles arrived in Germany, they **** a brick when one would drive by. US consumers usually get first crack at German engineered cars (BMW, Volks, etc) and the Germans usually get them after the US market, what a raw deal.

Rx8Freehk

mmmmmmmm so i should try to sell it for $$$$$$$$$$ NOT!!

Omicron

First off, if you bought your car in Arizona, then you are driving a US spec model, and reflashing the ECU to German/Euro spec will not necessarilly gain you any HP. In fact, you may lose some. Also keep in mind that the ECU does a lot more than just performance stuff... you may wind up with your stereo display in German!

Secondly, you titled this thread "CZ's HP gain all ECU?" then didn't refer to the CZ mod. Are you asking if it will work over there? Since you have a US spec car, the answer is definitely YES. If I were you, I'd get onto the waiting list for this mod ASAP. If it were a German spec car, the answer would have been "maybe."

Hope this helps.

Rx8Freehk

oh ok ty alot!!

RX-8 friend

I'll divulge a "secret" here.

It "appears" that there are two ECU programs. Japaneze, and everyone else. So I doubt you would win or lose with a reprogram. If I told you how I found this out I'd have to shoot you, and as I'm Canadian, and not allowed to own a gun, I can't .

HP differences quoted by Mazda are mostly due to differences in measuring techniques and standards. i.e. a euro HP is different than a US HP.

The nice thing about standards is there are so many to choose from!

MrWigggles

Have there been any dynos of the stage 1 ECU mod?

Even a before and after Gtech Pro dyno would be fine.

-Mr. Wigggles

RX8 fever

No Dynos
No Pictures
No ECU Yet
No date for shipping
No web page
No canzoomer's
Few G tech times posted

But something is for sure:

1- Price increased from $500.00 to $750.00
and yet no sign of the modification.

Reasons
1- Too busy
2- Holidays
3- Too cold
5- Parts not the one ordered
6- Its just a side project
7- Dynos hard to trick
8- Unit new design etc,etc