by: Wrench -- EasyRider Magazine -- Reprinted with Permission
Carl Morrow of Carl's Speed Shop, previously located in Santa Fe Springs, California, had two missions in life. The first was to find ways to make Harleys go faster, and put his riding son, Doug, in as many record books as possible. The second was to get the hell out of California! So, he's moved his entire family (they all work with him in his shop) to the seaside community of Daytona Beach, Florida.
Carl's new shop was under construction during the 1995 Octoberfest; he's opening for business in January. By the time of Daytona Bike Week, his shop, located at 390 North Beach Street (a couple of blocks north of Daytona Harley) will be in full swing.
Performance is Carl's passion. His latest accomplishment is the polished Typhoon billet carburetor, based on the slide-type CV and the early side bowl Linkerts for Sportsters and the very first Shovels. Two classic carbs went into this design. The round slide in the front of the carburetor moves up and down with engine demand, keeping the velocity of the incoming air high, and allowing for extremely accurate fuel metering throughout the entire engine operating range.
The carb is simple, since the CV system allows Carl to do away with accelerator pump, idle circuits, and primary and secondary jets, and leaves owners with only one jet orfice to contend with. This jet is the brass fitting in the center of the table beneath the slide. It is penetrated by the jet needle, which is attached to the slide. As the slide lifts the needle from the jet, it allows more fuel into the venturi.
Since Ball's a speed freak, we decided to take the plunge with his Dyna Glide. The Ball Glide is a '92, with dependable performance from Bartels' performance products, and uses.080 shaved and ported heads, a BP 20 street, grunt cam, Bartels' one-off pipes, Screamin' Eagle Ignition and carb. The bike has always performed and held a constant 80 horses. It's no slouch.
Carl went to work first removing the Screamin'Eagle carb and Bartels' manifold. He then bolted on his large plenum intake manifold loosely and installed the mounting strap to the center case bolt. Barnett cables are provided with the kit (push and pull, or just pull), but we chose to use Barnett braided cables. They work fine, but a slight modification had to be made to the cable end, which enters the guide at the billet throttle runner.
Their cable ends, which protect the braded material, are stronger and more substantial than stock. Consequently, they ran into one another at the guide. With a slight tweak on just one of the cable ends, they both slipped in without a problem. I suggested greasing the cable runners in the throttle body and next to the carb, and dripping some 30-weight down the cable--before final assembly--to ensure long life.
For a precision fit and a polished appearance, the entire carb is billet aluminum--even the cable linkage. Carl then installed the carb without the dome cover or the piston, installed the gas line, and turned on the gas. There is a small bridge under the piston and inside it is the main (the only jet). The float level transmits to this chamber and the gas level should be close to the top, approximately .060 to .080 below the jet orfice table--but not overflowing.
This is your buildt-in accelerator pump, choke system. That puddle of fuel is always at the ready when the engine demands it. If the level is improper, take the carb off the bike and dump the gas. Take the float bowl cover off by removing the four stainless steel Allen screws holding it. Use caution not to tear the gasket.
Locate the float and examine its operation. Corrections can be made by bending the stainless steel tang on the end of the float up for higher fuel level, or down for a lower fuel level.
It is recommended to keep the level where specified; otherwise, the chance of flooding is increased. Replace the gasket and float cover. Thighten the screws snugly, but carefully, and avoid stripping threads.
With the float adjusted, Carl mounted the carb to the manifold with the piston and needle in place, and dome cap installed. There are only two adjustments to the Typhoon; the idle adjustment, and the main enrichener.
For idle adjustment, locate the throttle wheel attached to the throttle shaft at the rear of the carb. Just in front of this wheel, you'll see a chrome thumb screw. If you screw it in clockwise, it will open the throttle disk, increasing the engin rpm and vice versa. It's easy to adjust for cold idling and running.
The second adjustment is the main jet enrichener. The bolt and lock nut can be found at the very bottom of the carb body. To richen the overall mixture, release the lock nut and turn the adjustment bolt counterclockwise in small (one hex flat at a time) increments. To lean the mixture, turn the bolt clockwise. Make all adjustments slowly, then tighten down the lock nut snugly. Remember: Left is rich, right is lean. If at highway speeds the carb spits back, it's running too lean.
Carl completed the assembly, took the Dyna for a ride, made minor adjustments, and turned it over to Ball. This Dyna's always been a solid runner, and the song it sang was louder than ever. "I need forty-eitht mph grunt to escape L.A. traffic," said the balding, bearded Ball, "The grab at the low end has never been this strong. It's instantaneous."
Carl boosted a 4- to 6-horsepower gain with the billet air cleaner or the nasty-looking velocity stack, respectively. But as all riders come to realize, the ideal grunt is in the seat of the pants, and editor Ball was so impressed, he rode directly across town 90 miles to Marty Ruthman's Hi-Tech Custom Cycles in Van Nuys, California.
Marty builds fast bikes, He knows when a bike is performing through the seat of his pants, and he was almost launched off the rear of the seat when he hit second. Returning to the shop, Marty cleared his Dyno and ssaid, "I've got to Dyno this puppy. It's fast."
To confirm the bike's consistency, Marty ran the bike through its paces twice. With no modivications other than the installation of Carl's Typhoon carb, it performed 90hp with 90 pounds of torque. Marty has since ordered a half dozen, and four are already out the door with similar results.
"I mounted one on a guy's bike and he was so pleased he brought me a box of imported cigars the next day. Hell," Marty said, "I don't even smoke." But the bikes with Carl's carbs sure do.
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390 North Beach Street
Daytona Beach, FL 32114
386-258-3777 FAX: 386-258-1400