<div class='quotetop'>QUOTE (mylexicon @ Feb 28 2010, 02:12 PM)
<{POST_SNAPBACK}><div class='quotemain'>I'm starting to believe that WSBK is rev-limited.
I know, it seems impossible, and I have no idea why they wouldn't just come right out with it, but if you crunch the numbers, there is no way these bikes should be relatively equal. The Ducati and the Suzuki should actually have the lowest peak horsepower figures in the field, while the BMW should have about a 30hp advantage over both.
I've never really mentioned it b/c it seemed somewhat unbelievable (even to me), but Noyes revealed something very very interesting in his article about MotoGP. He was making a comparison between the bore measurements of production machines and the 81mm bore-limited 1000cc MotoGP bikes. The comparison was innocuous enough until he pointed out something only an expert would notice. He revealed that WSBK once had a rule that rev-limited bikes with bore/stroke ratios over 1.5, but that it had mysteriously disappeared without any announcements sometime prior to the BMWs homologation. I believe he said the rev limit was 14,000rpm.
That rev-limit is certainly a relic of the 750 era b/c most of the bikes would never achieve those rpm figures even if they were tuned to MotoGP standards. Furthermore, all of the 750s would have been rev-limited to 14,000rpm.
Also, if you look at the dimensions for the 999R engine. It shouldn't have been competitive with any of the 4 cylinder bikes of that era. Also, the 999R had special friction fighting modifications like extra piston rings in order to help twins compete. Those mods were probably granted to Ducati so they could reach the rev limit. The additional 200cc was basically designed to let Ducati have a lower rev limit. The bore barely went up, almost all of the displacement was gained by stroking the 999R.
Again, I have absolutely no idea why they wouldn't be forthright with the information, but the 5.5mm discrepancy between the Suzuki and the BMW makes it almost inconceivable that those two bikes could share the same track without a rev limit. The BMW should have a huge power advantage, yet the BMW finishes in the midpack or the rear.
Based upon the Suzuki's engine dimensions and the 999R's engine dimensions, the rev-limit is probably 12,000 rpm and 1200cc twins are at 10,000rpm.
Let me be clear, I have absolutely no idea how they could possibly be suppressing a rev-limit for the last 7 years, but it is part of the sport's history, and the emergence of the 80mm BMW and Suzuki's continuation of the 74.5mm engine makes it inconceivable that those bikes could share the same track without a rev-limit.
If you believe the bike magazines, the BMW has a huge peak HP advantage in stock trim, like 20 HP. Everyone that has put one on a dyno has reported over 180 at the wheel.But as someone else said, HP doesnt always equate to wins in bike racing. If they are running at Bonneville,they might have something but i cant think of a road course that allows any of the machines to reach top performance levels. You have to gear a bike to the track, and what BMW is capable of up top
is being taken away by the gearing they have to run to match the other bikes in low end, off corner grunt. You cant have both and Ducati has proven over the years that grunt off the corners is way more important than sizzling top end speed. And like someone else said, the Ducati has a restrictor plate to keep their HP numbers in line.