Title: Cool Bonneville Video Post by: Speeddog on August 24, 2009, 06:33:35 PM http://roadracingworld.com/news/article/?article=37815 (http://roadracingworld.com/news/article/?article=37815)
A very good bit of film, about as close to the real thing as I've seen. Must have been very nice weather, else all those guys in black shirts would've died from heatstroke. [laugh] Title: Re: Cool Bonneville Video Post by: mitt on August 25, 2009, 04:05:01 AM note to self - watch video at home tonight...
mitt Title: Re: Cool Bonneville Video Post by: zooom on August 25, 2009, 04:14:36 AM note to self - watch video at home tonight... mitt was thinking the same thing when I saw 45+ minutes on the counter.... Title: Re: Cool Bonneville Video Post by: mitt on August 25, 2009, 06:14:11 PM OK - that was fvcking cool.
Sooo many questions come to mind.... 1 - Rosie is 71 yrs old ? - that is wild 2 - How hot is Leslie? 3 - How many miles to get up to speed before timing starts? 4 - After 10+ passes at 12,000 rpm for ~3 miles - wouldn't the engine start to fade - valve adjustment, timing, etc? 5 - What can they do to the bike? They talked about altering the octane, do they also adjust timing / and AF ratio? 6 - How rough is the course? 7 - Why no sedeci RR out there? Title: Re: Cool Bonneville Video Post by: cyclops on August 25, 2009, 06:36:10 PM 2 - How hot is Leslie? 7 - Why no sedeci RR out there? I was thinking the same things ;D Title: Re: Cool Bonneville Video Post by: Speeddog on August 25, 2009, 07:41:09 PM 1 - Indeed, a good percentage of older car folks, bike folks tend to be younger, but not all.
2 - Way. 3 - "Long Course"; 2 miles to get up to speed, then they time you over miles 3, 4, and 5. "Short Course"; 2 miles to get up to speed, then they time you over mile 3 only. A 200mph capable bike doesn't even need 2 miles to get up to top speed, assuming that there's enough traction available. Traction isn't usually a problem until ~190mph or so for a typical bike. 4 - A production engine might fade a little, they may have scuffed a piston or had some valve sealing issues. They ran fast off the trailer, but couldn't get the speed back until they unhooked the O2 sensors. 5 - Not sure of the current status of the rules, as the SCTA didn't have the rulebook online last time I looked. Also, they were going for FIM records, so the rules may be different from back in the days I was running. At that time, "Production" meant it externally *looks* stock, other than you can change the pipe. IIRC, nearly any modifications were allowed inside the engine, except you had to use OEM carbs or TBs, and stock airbox. 6 - The course is very smooth, generally. They grade it and drag it. The high HP cars can dig ruts with wheelspin, so that can be a problem for the bikes. If the salt is damp, it can be pretty slick. If it's dry, it can take rubber just like asphalt, so traction will be good. 7 - You could run a Sedici, not sure if it would qualify for Production, again, not sure of FIM rules vs. SCTA rules. Relating to that... At Bonneville and El Mirage, weight is not your enemy for ~180mph and over. So a Sedici would likely do better with ballast. I did a rather sophisticated simulation program to see what things affected top speed capability. If you had enough power to spin the tire in top gear, or even one gear down, adding weight would help. I did check the effects of a wing that I thought would have a remote chance of passing tech on my bike, it was so inefficient that it wasn't worth it. I never understood the car guys that had wings complaining about wheelspin. ??? "Well, *duh*, crank some wing into it." [roll] A decent car wing is very efficient. Title: Re: Cool Bonneville Video Post by: Jester on August 26, 2009, 09:35:19 AM I would think you could run the sedici rr. That's also what came to my mind after watching that video. During recent top speed tests with the desmo, they hit 190 on stock gearing and said it had plenty of pull left. Just swap out the sprockets and I think you'd have an easy record winner of 200+. So... who's got 75k and a trailer?
Title: Re: Cool Bonneville Video Post by: kopfjÀger on August 26, 2009, 07:57:00 PM I would think you could run the sedici rr. That's also what came to my mind after watching that video. During recent top speed tests with the desmo, they hit 190 on stock gearing and said it had plenty of pull left. Just swap out the sprockets and I think you'd have an easy record winner of 200+. So... who's got 75k and a trailer? I don't think it would fall in that category? |