Here's the Quarter Master clutchless setup for Dirt Late Model racers. It includes the bel
You've probably heard the old saw about cutting one pound of rotating weight out of the driveline is the equivalent of cutting several pounds of lead weight attached to the car. And it's true. That's why smart racers as well as chassis and engine builders work so hard to shave ounces of rotating weight even if they will have to add an equal amount back in the form of ballast on the car.
One group that has taken that to the extreme is Dirt Late Model racers. Utilizing a Bert/Brinn-style transmission eliminates the traditional clutch and allows the use of an extremely small flywheel. This cuts rotating weight, but the smaller diameter of the flywheel also reduces the leverage the starter has, which can cause issues. A high-torque starter can handle this, but it also puts tremendous force on the area of the bellhousing where the starter is mounted. Aluminum and magnesium bellhousings have been known to crack and fail because of this stress.
Since most Dirt Late Model chassis work with a mid-plate for mounting the motor, the bellh
In fact, Dirt Late Model racer Chris Hargett says he has had starters fall off the car on the racetrack as a result of cracked bellhousings. "I finished the race," he says, "but pity the driver behind me." And welding up bellhousings midseason is also a common occurrence.
Hargett, however, says his troubles ended when he began using a dirt bellhousing kit from Quarter Master designed to handle the abuses of Dirt Late Model racing. "Before, I was going through two starters a season and having to take the bellhousing off midway through and weld up the cracks just to get it to last," he says. "But I switched to the Quarter Master stuff when I was getting ready for the 2005 season, and I haven't had any trouble with any of it. I'm still running the same components I put on the car back then."
To find out more, we followed along as Hargett installed a new Quarter Master dirt bellhousing kit in a new car being prepared for the 2009 season. The bellhousing is magnesium for the greatest strength at the lightest weight and fully CNC machined to ensure the best-possible fit of all components. This bellhousing is designed to work with both top- and side-mount oil pumps and works with Bert/Brinn-style transmissions. It comes packaged with a lightweight 91-tooth flywheel and a reverse-rotation starter. In all, installation took approximately one hour and only standard shop tools were necessary.
One of the more aggravating things as a racer with a chassis that doesn't have a dedicated
Now tap the hole in the bellhousing with a 1/4-20 tap.
The bolts run from the engine-side of the mid-plate through to the bellhousing. To keep th
Remove the engine plate and attach the starter adaptor. The adaptor uses both button-heade
As you can see, the starter adaptor mounts to the bellhousing using fasteners that go thro
This is the oil pump mount. It's anodized aluminum but is buttressed by a piece of steel r