ca315

https://www.youtube.com/watch?v=29C2OLEN9pM Another sound track to enjoy. The sound is good, similar to what you hear on the road as the session was wet. I had mic'd up the VFR, but it only worked in the 1st and 3rd session, might have been water from the first session in the connections. I was on brand new Metzler M9s, first ride in 9 months, so brain rusty and had no idea how much grip I had, most guys in the session had full wets on, so just dawdled around and stayed out of their way, started to get an idea of grip around lap 3. Also mounted the GoPro for a good view of the tacho, but realised as soon as I took off that I couldn't see it, so just rode by the exhaust note. The day did get much better.

All of the data is out of the GoPro. Hero 5 onwards imbed GPS data in the MP4. I used Race Technologies software https://www.race-technology.com/gb/racing/products/video/video_gopro-only . It combines the GoPro files, extracts all of the data, calculates lap times, sector times, lean angle, acceleration and decelleration, etc. and gives you the ability to export the video with the data overlay.

For those of you who like the VFR sound. This is a Gen5 at Phillip Island at a recent f track day, been 9 months since I've ridden a bike, first session was wet, so wobble around in this dry session for the first few laps scrubbing in new tyres, missing a few gear changes and getting the brain into gear. Put a microphone under the rear cowl and hooked up to a GoPro Hero 6 to capture the sound. It isn't as simple as you might think, the sound is so loud that it distorts, I chose this mic as it has an 140dB SPL, even then I had to wrap a few rags round it. I think I can improve on the sound recording, good excuse to go back and try again. Bike is a Gen 5, Staintune exhaust, power commander, Wilbers suspension, Metzeler M9s, Galfer braided lines, Brembo disks and pads, otherwise standard. Yes I know it needs a quick shifter, it's on the list. Got down to 2:08.74 in this session, got down to 2:06.24 later, and then the last session was cancelled due to a crash, my mate, battered but he will be OK. Go faster? Probably, but the bike is 21 years old and I'm 66, so not out to scratch either. Anyway, enjoy. https://youtu.be/Rij2Qf-qDU0 Slightly quicker lap here: https://youtu.be/N78Mzy16r14 (no rear mic - technical difficulties, this is the Hero7 mic on the front camera).

I watch the tacho, change up around 11k. Max power is around 10k, so drops just below max power when you change.

Hero 5 onwards record GPS data in the file, it is extracted and overlaid using Dashware http://www.dashware.net

Here is a demo of VFR '99 brakes. Brembo disks and pads, and Galfer lines, but retains the linked brakes. At the 20sec mark, accelerate to 150km/h and hit the brakes at the 150m marker. Didn't end well for the BMW rider.

Here is another sound track from Phillip Island 6 Mar 2020, this one has speed and track position.

Here is another clip https://www.youtube.com/watch?v=iUoJKmMqkqs&t=259s from 9 March 2020

For those of you who like a VFR800 sound track, this is a clip from one of the track day sessions yesterday at Phillip Island. Speedo and tacho in the shot. https://www.youtube.com/watch?v=hO5JZZgC5Vo&t=740s Some highlights; geese on the track at 1:40 and a dice with a CBR1000 starting at 14.00, he runs wide at 14:44. He could only get me on the straight. VFR is a 99 model, performance mods: · Power commander · Air box mods · BMC air filter · Wilbers suspension front and read · Brembo disk and pads · Galfer braided lines · Metzler M7 tires · Staintune exhaust (no restrictor) I had an aversion to scratching it, so not pushing as hard as you could. I was lapping around the 2:10 mark, best 2:07. To give a comparison I was sharing the garage with a 2016 BMW 1000RR, he had just bought it and got down to 2:03 at the end of the day and 275km/h down the straight vs my 210km/h (speedo has a HealTech SpeedoHealer on it, so it is accurate). More experienced riders on the same BWM’s on slicks were around 1:53. So not bad for a 21 year old bike on road tires.

Whoops, yes nickle plated rims, about to be replaced with a set of shadow chrome rims. The plating is breaking down and air leaks at the tire bead.

Here is a sound bite of my '99 VFR800 at Phillip Island. Staintune slip on Powercommander Air box mods BMC air filter Wilbers front and rear suspension Brembo pads & disks Galfer braided lines Metzler M7s Sergeants seat MRA screen GiPro gear indicator smoked indicators LED taillight PAZZO levers Red Fox rear hugger and fender flick MCCruise cruise control Nickel plated rims and, black metallic paintwork on the levers, triple clamp, foot pegs, etc.

Good to see you have a great day and followed the basic rule of ride at your pace and go home sunny side up. Scratching the bike is a big inconvenience, followed by scratching yourself.

"$132 AUD MORE than the Honda parts" ???? They are US$119 a pair!!!

"It doesn't matter how much filter media you fold into a given opening size or how deep you make those folds, an air filter will only flow as much air as the opening of that filter allows and the BMC opening has been significantly reduced. " That's nonsense. The BMC opening is slightly smaller than the OEM, at least on the one I purchased, the K&N is noticeably smaller than OEM. The opening on all is far greater area than the opening into the housing, which is the ultimate restriction. The BMC filter is at lease twice as deep as the OEM, which makes it effectively well over the size of the OEM, can't comment on the K&N filter depth. The free area required into the VFR engine at a maximum RPM is only around 2,500 sq mm or about 40mm x 63mm (max two cylinders are drawing air at any one time). So the size of the opening is not the defining factor in this case, it is clearly larger than this. The filter is sized to minimize resistance and to lower the air velocity across the face of the filter media sufficiency for it to trap the contaminants. So you work backwards. Take the total air flow and the desired face velocity on the media to give you a total filter area required. That is the size of the opening required, however the physical opening size can be reduced if you fold the media. The larger the filter media area, the less resistance to air flow and/or greater air flow for the nominated resistance of the media. The greater the media area, the greater the capacity to trap contaminants and maintain air flow without imposing too high a resistance on the air flow. Air conditioning filtration design 101. If you compare the total area of the foam media of the Pipercross, which is a flat shape to the total area media area of BMC, K&N or OEM then the Pipecross will have the least total face area of media, which means that the air velocity across the Pipercross media must be higher. However the design of the Pipecross has the media further away from the stacks which probably results in similar performance, whereas the air flow across the paper filters will be focused on a smaller area. Even if the filter V is close to the stack, the total effective area of media through which air flows will be well above the area of the stack. Pretty brave to call a major manufacturer incompetent. Better give the Yamaha MotoGP team a call and warn them.

"The Pipercross air filter is the only filter offered for the VFR800 that has any improvement in air flow. The cross sectional area of the BMC and K&N air filters is tiny compared to the oem filter and the BMC air filter sits on top of the factory velocity stacks, which can not be good for air distribution. The Pipercross air filter uses all available surface area for the filter media and it has a convex shape that gives the velocity stacks plenty of breathing room." Be that as it may, as a mechanical engineer specializing in air conditioning, I can assure you that the BMC is considerable greater filter areas than OEM. The filters are folded into a V to compress the footprint. The area of the filter media is measured by depth of the V, or if you want to trash the filter, pull it out and stretch it out and measure the area of the filter media when it is laid out flat. The BMC filter Vs are at least twice the depth of OEM. The Pipecross is a foam filer and the BMC a paper filter. The Pipecross filter has to be the full width as they cannot fold the foam into a V, the concave shape will also increase the area, and stop it getting sucked into the stacks. The metal reinforced paper does not have the same structural issue. To compare filter areas you would have to lay the filter area of the BMC paper flat over the Pipecross foam and compare areas. You would also have to air flow the two media to compare air flow at the maximum air intake of the engine. Also note that the optimum area of the opening into the air box to match engine air intake is achieved by removing the snorkel and flappers.