This text was initially revealed within the February 2002 subject of Motorbike Cruiser.
So, you’ve received a very quick motorbike. How do you show it? You possibly can put it on a dyno and e mail all your pals the numbers. However everyone knows that totally different dynos give totally different numbers. You possibly can exit trolling for roll-on contests. However racing on the road is prohibited, and also you by no means actually have management over the state of affairs sufficient to show how briskly your bike is. And in addition to, drag racing reveals how fast your bike is however not how briskly. The one actual solution to show you may have a particularly quick motorbike is to race it at sanctioned land velocity occasions. Of these contests, the largest, baddest, and trickiest of all of them is Bonneville Velocity Week.
Christian Ray from Nashville, Tennessee knew he had a severely quick Valkyrie and wished a solution to show it to the world. Then he stumbled on the thought. He’d take his Valkyrie to the Bonneville Salt Flats. That means, no one might dispute his declare on the world’s quickest Valkyrie. Nonetheless, he didn’t need his bike to turn into a single-purpose automobile. His record-setting bike would even be his every day rider and a motorbike he excursions extensively on.
What makes Ray suppose his Valkyrie is so quick? For starters, the engine sports activities a horny La Monster Supercharger System that includes a dependable Magnacharger supercharger. Whereas that will sound highly effective, the trick internals of the Valkyrie are the place the true magic takes place. Dan Paramore, a head-flow guru in California, whipped up one among his Stage 6 heads for BonneValk by modifying and reshaping the combustion chamber to extend quench space (squish band). Then he ported and polished every thing earlier than slipping in some Swain Tech ceramic-coated valves. The outcomes had been a 20-percent enhance in consumption circulation and 30-percent on the exhaust facet. Ray even flew Paramore to Nashville so he might minimize and polish the pistons. As soon as the heads had been completed, Paramore centered his grinding abilities on the Supercharger’s manifold to extend its circulation capabilities to match the brand new heads.
To safeguard the engine when working below full increase the compression ratio dropped to 9.1:1. The valve springs had been shimmed to make them shut snappier. Bumping these valves had been a set of cams floor to Paramore’s specs. Cam timing was additionally altered to shut the exhaust valve a bit earlier in order that the blower might cram as a lot of the gas cost into the cylinders as potential. To deal with the facility, a Barnett clutch changed the stocker. Paramore and Ray rigged a double diaphragm clutch spring to verify the plates didn’t slip.
However that labor is all out of sight. The manifestly apparent horsepower comes from the 2 bottles of nitrous oxide strapped to the rear fender. The Nitrous Categorical system is tunable for max increase and the ramp-up time of supply, hopefully making it potential to get massive bumps of energy to the rear tire with out spinning it on the salt. Lastly, a Dynatek ignition and Supertrapp exhaust system had been chosen for his or her tunability. The outcome? Round 165 hp, give or take just a few.
One other Planet
Though no one attending Velocity Week would in all probability discover if two suns rose over the expanse of the salt flats, contributors within the Bonneville Nationals all know they’ve entered one other world—one ruled by Guidelines and Laws.
All of the gamers on Challenge BonneValk arrived on Monday of Velocity Week. The primary day was spent organising base camp and navigating the tech inspection. At first they had been assured, in line with the rule e book, that BonneValk may very well be configured to set 4 open data. All of the bike needed to do is full qualifying and backup runs at any velocity to set every of those data. Nonetheless, Ray and Paramore didn’t wish to set something however stable, respectable data that others should work to beat. So, they disconnected the nitrous bottles and received prepared for the supercharged gasoline class as their baseline.
Tuesday started with a sluggish begin. Not one of the workforce realized two-hour plus look ahead to every run was so as. Fortunate groups get three runs in a day. Paramore wanted his two licensing passes earlier than he might try a qualifying run. Ray additionally wished to see how the Valkyrie’s jetting was working on the 4200-foot altitude. So, Paramore’s first cross was a mere 117 mph. A jetting change and a bit of extra throttle netted BonneValk 147 mph. Paramore earned his license, and the workforce resolved to hit the bottom working on Wednesday.
Guidelines is Guidelines
Day three started with one more jetting change and a valve-clearance verify. Though the carb was nonetheless working a bit lean, the supercharged engine had but to hiccup—and BonneValk nonetheless hadn’t run at full throttle on the salt! After seeing how sluggish every thing progresses, Ray and Paramore revised their aim to setting solely two data for the week; the primary with gasoline and the second with nitrous.
On the finish of the day, with each run producing quicker speeds, Group BonneValk settled on the final run of 156 mph because the qualifier for his or her first report. Nonetheless, upon arriving on the impound space, they skilled the nice, unbending weight of the rule e book. When a motorbike arrives in impound, an official performs a visible verify to verify the machine qualifies for the category. Everybody’s coronary heart sank because the unsealed gasoline tank was identified. Being time trial novices, not one of the workforce members knew that an official needed to witness event-sanctioned gasoline being put into the empty tank earlier than it’s sealed shut. Unswayed by the groups pleas, the official defined that the one solution to insure the integrity of the data was to observe the foundations to the letter. The workforce recategorized Wednesday as a testing and tuning day.
Quicker and Quicker
Thursday started with jetting woes. Although Ray had put in a 220 primary jet, the biggest one made for the 45mm Mikuni, the plugs mentioned the bike was working dangerously lean in the course of the lengthy wide-open portion of the timing run. Paramore and Ray resorted to drilling out a jet and calculated that it measured the equal of a 245 primary. The change yielded a 158 mph cross by way of the lights.
Speaking with individuals in impound yesterday had alerted Paramore and Ray to a loophole within the guidelines that permits opponents a second likelihood at a greater qualifying run with out sacrificing the present run. The rule e book mentioned that contestants have an hour after a timing slip is issued to ship a motorbike to the impound space. So, the scuttlebutt went, for those who might flip across the second run in lower than an hour, you can nonetheless use the primary run if the second wasn’t any quicker.
The road was considerably shorter on day 4 as Velocity Week wound down, and a second run in an hour was possible. Naiveté and the need to put up the perfect report potential received the perfect of the workforce, and Paramore went out for a second run. Halfway by way of the timed mile, as he tried to make himself as small as potential, Paramore’s knee hit the ignition swap, killing the engine—and the run. They arrived with the bike in impound with solely a minute to spare.
Sadly, a few seasoned veterans identified that the precise wording of the rule governing report runs contradicted the favored sentiment expressed by the previous salts the workforce had talked to. So, to dispel any look of impropriety, Bonnevalk hit the salt once more and rewarded the workforce with a timed mile of 161.352 mph! The improved velocity was the results of bumping the gas strain as much as 4 PSI to power the gas into the carb quicker to counter the nonetheless current lean drawback.
The bike was tucked away in impound with out incident, and the workforce went again to the lodge in a celebratory temper. A report was of their grasp.
Guidelines is Guidelines—Reprise
Due to a miscommunication concerning the lodge departure time, Group Challenge BonneValk arrived 5 minutes too late for the backup runs. Not being a part of the escorted procession from impound to the beginning line is the equal of breaking the seal on a gasoline tank. As soon as once more—however this time on the final day of Bonneville Velocity Week—the workforce discovered itself again at sq. one. The one choice that they had obtainable to them was to run the bike for one more qualifying time after the morning’s back-up runs. Then within the afternoon, they might have one final shot to again up their qualifier. The dream of setting greater than a single report was deserted. Another misstep and the week could be wasted.
The ultimate two timing runs had been nearly anticlimactic. BonneValk suffered from a little bit of wheelspin within the qualifier, limiting the velocity to 158.149 mph. Whereas the bike waited in impound, the workforce packed up their pit and loaded the trailer. Friday was the tip of the week. In just a few hours, they would depart with or with no report.
The Fates forged their merciless eyes as soon as once more on Challenge BonneValk in the course of the closing backup run. For the primary time in the course of the week, the engine sputtered, sounding like it might give out. Paramore pulled within the clutch, getting ready to coast by way of the timing lights on the finish of the observe. Nonetheless, when the engine settled down at idle, he launched the clutch and gave it the berries. The outcome was a disappointing 149.763 mph. Solely the displacement take a look at remained between Ray and his report.
Since Bonnevalk displaced a inventory 1520 cc in a 1650cc class, the report was a fait accompli earlier than the measurement was taken. Nonetheless, the chastened workforce waited anxiously for the ultimate signatures on the report kind earlier than starting the celebration. After 5 days on the salt, months of preparation and more cash than anybody was prepared to confess, Challenge Bonnevalk had a licensed land velocity report at a median velocity of 153.956 mph.
Though Ray didn’t get the 4 data he’d initially hoped for, he struggled, persevered, and received the privilege of with the ability to say he owns the world’s quickest Valkyrie—no less than for this 12 months. However Ray and Paramore are planning for one more try on the report. Twin carburetors will deal with the jetting points whereas higher streamlining and narrower bars will assist Bonnevalk push much less air. They’re already dreaming of the magic 200mph.