While I haven't been much around lately nor had any progress on the car, the mind keeps on working
What I'm thinking about is the airbox and the ram air scoops that come on the R1.
My assumption is that they are tuned to maximize the engine's perfomance.
On the Suzuki GSXR series of bikes the ram tubes aren't particularly "tuned" as much as they provide the passage way for the rammed air to the sealed air cleaner at higher speeds. This acts as a mild super charger.
The plenum created by the volume of air between the air filter and the velocity stacks provides the open space for the stacks to see the larger air volume to resonate against. The presence of the pleated air filter would probably cancel out any resonance affects through the tubes to the air cleaner box (plenum)..
My BEC has the large 1/2 loaf of bread looking foam air cleaner that is in the cool air stream. My engine runs way too rich above 5K RPM (~11.8:1 AFR). On the bike that would be ~75 MPH where the extra fuel would probably not result in as rich a mixture as I see without the ram affect.
I wonder how dyno tuners compensate for the lack of rammed air when the bike is running WOT in still air. Educated guess? I can just see somebody trying to build a fan to blow 180 MPH air into the air cleaner (as everything not tied down gets blown out of the shop into the street!).
Two leaf blowers perhaps?
The following link has a reference to the air tubes on the 2003 GSXR-1000.http://www.sportrider.com/bikes/2003/14
This is a quote from that article that would be of interest.
"Relocated ram-air intake ducts are 20 mm closer to the center of the fairing increasing ram air pressure, charging efficiency and torque output."
The velocity stacks on my GSXR-1000 engine are rather strange looking creatures. There are 4 horizontal slots near the outer curved portion that (from what I've read on the net somewhere) serve to broaden the range where the stacks provide optimum resonance charging affect. I've never seen that done before. It also influence my decision to NOT change anything around the intakes. The Japanese engineers seemed to have really done their homework on these super bike engines.
a.moore asked: "What sensors are on the R1's airbox? MAP and intake air temp?"
The Suzuki the air cleaner box has the intake air temperature sensor (IAT) and the intake air pressure sensor (APS). There is another intake air pressure sensor (IAP) plumbed into the vacuum side of the four throttle bodies.
The ECU is constantly adjusting the fuel mixture in relation to the two pressure sensors, the engine speed and the gear it's in to compute the weight of the air being used by the engine. It seems that even though I don't have the rammed air the mixture is being made richer anyway.