of course the center pipe glows orange first; it sees twice the temperature cycling due to being shared by both rotors. As far as the energy is concerned, it doesn't necessarily equal out as you suggest. That really depends on the real-world dynamic flow characteristics between the end and center ports. I've yet to see any real data on this, though I suspect Mazda R&D probably has a feel for it.

Without separate,equally-sized center ports and overlap timing I'm doubtful that the exact configuration will ever matter much.

EDIT: The issue I have is that this thought process is too 1-dimensional. The theory is being used like a separate port in a separate cylinder/rotor. The problem is you cannot simply tune one pipe for the center port and and another pipe for the end port, because they will not necessarily combine for a net effect, possibly even the opposite. The key will instead be in finding a tuning where they work in harmony, which due to the shared fature will IMO at best be a compromise after a whole sh-t load of trial & error and then possibly to no avail

 

No it is 145 kw@8600 rpm. I'm a little bit busy now building a 600 hp REW motor for a customer. I think i can dynotest the header next week.
Mikael is also progressing building the new RX-8 Racing inlet manifold which we shall test on my RX-8. Now i shall sleep!

/Lasse

 

Is Hymee going to sell his header? Was theat 14hp from a stock tune or did he use a tuned ECU to get that much? That's pretty sweet nonetheless.

 

You are assuming that it isn't already doing this. The center port should be sending a different type of pulse back to each rotor than the outer ports are so it should already be combining in an interfering way.

 

Pretty sure he was going to sell it .
can't remember now whether it was tuned or not , its in his thread . I know the 14 hp included removing the cat so perhaps not that impressive .

 

He's staying with us in my hotel room this weekend so I'll ask him.

 

I am interested to see the results of a header that seperates the center exhaust port and collect the front and back rotor seperatly as RG stated. I think that would keep the flow cleaner, the center exhaust port sees twice as many pulses as the front and back rotor alone. But I dont know if the results can justifiy the extra welding and tubing, cost.
________
Plitochkaop

 

Well if my prototype header no 1 don't gain +10 hp over stock log manifold then i will try RGs header type.

/Lasse

 

Any updates?

 

Please start a new thread with your design, rather than posting here.

 

Ok! It been a long time since i was here becausse of to much working and dyno testing 13b N/A and Turbo. Will start a new thread.

/Lasse