SPG header
10-23-2006, 02:42 PM
#26
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
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
Last edited by TeamRX8; 10-23-2006 at 02:59 PM.
10-23-2006, 03:45 PM
#27
Lasse wankel
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Originally Posted by Brettus
I have recorded max rpm of 8900 - 9000 . The guauge is definately way off .
So your "before header" is 142 kw ?
So your "before header" is 142 kw ?
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
10-23-2006, 09:18 PM
#28
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Originally Posted by Brettus
You are onto it I think - Hymees header does not join till about where the resonator sits & he made 14 hp at FW .
10-23-2006, 09:41 PM
#29
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Originally Posted by TeamRX8
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.
10-23-2006, 10:07 PM
#30
Originally Posted by Madhops
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.
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 .
10-23-2006, 10:38 PM
#32
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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.
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Last edited by Renesis_8; 09-11-2011 at 09:57 AM.
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