New WKA 4 cycle class - Briggs Pro Gas

[Steve Baker]

WKA has added 3 new classes to the National Gold Cup Sprint Series for 2013. The 3 new classes will be in the Sportsman, Junior and Senior age groups. WKA is very excited to offer the Pro Gas classes as they will provide competitors with a unique experience that combines highly competitive racing with a lower cost engine and maintenance package.

CONCORD, N.C. – The WKA RLV Tuned Exhaust Products Gold Cup Series will return to a 4-cycle-only national tour in 2013, and included in the new season’s class structure will be three new Briggs Animal Pro Gas divisions.
The new Pro Gas classes will be for Briggs Animal engines running on unleaded pump gasoline from a designated
Briggs Pro Gas Sportsman will be offered for racers age 7 to 12 years old, Briggs Pro Gas Junior for the 12- to 15-year-old category and Briggs Pro Gas Senior for drivers age 15 and up.
The three classes will run the final one, final two format and count the best seven out of 10 races toward a single national championship.
Here’s where it gets interesting.
In addition to the traditional national championship eagle trophies and other WKA awards, the champions of these three Briggs Pro Gas classes will be awarded an array of valuable prizes and products, led by a brand-new, turn-key go-kart chassis.
Coyote Motorsports, Margay Racing Chassis and Razor Chassis have posted primary sponsorship for the three classes. Each Pro Gas national class champion will win a brand-new Coyote, Margay or Razor chassis. Each kart will come complete with a Briggs & Stratton Pro Gas Animal engine and all key running gear, including clutch, tires, wheels, bodywork, etc., with exception to an electronic gauge.
It is yet to be determined which class winner will receive which chassis, however, it may come from a random draw or a mutual agreement among the three class champions.
A number of companies have stepped up to support this program with product awards for the 2013 racing season and year-end awards ceremony. In addition to Coyote, Margay, Razor / Roberts Kart Shop, the following companies are providing product sponsorship for the 2013 Pro Gas Gold Cup classes.
- Briggs & Stratton Racing
- Kart City Performance
- Baker Racing Engines
- American Power Sports
- Dyno Cams
- Target Distributing
- MGM Chassis Co.
- Michigan Kart Supply
- Bridgestone
- RLV Tuned Exhaust Products
- ARC Racing
- R2C Performance Filters
- Jammer Clutches
- Tomar Clutches
- SMC Clutches
- Bully Clutches

Many benefits highlight this new Animal Pro Gas engine program. Financial benefits include a lower cost to build, increased time between rebuilds, reduced labor time and lower engine and overall maintenance costs.
The Pro Gas engines will also feature increased engine durability, user-friendly pump gasoline usage and the elimination of carburetor corrosion issues that are currently associated with methanol fuel use.
Regarding engine performance, the Sportsman and Junior classes will see similar horse power and track lap times as the current methanol -fueled Animal. In the Senior class, the Pro Gas will run a slightly lower horse power at lower RPM levels but still very comparable at high RPM levels.
This performance equality will be emphasized utilizing some of the following spec internal and external components.
- Spec spark plug
- Spec exhaust header with port extension
- Spec Camshaft
- Blower housing guard with spec holes

[John Matthews]

Looks like a cool class but why did they decide to change the cam from regular Animal? And is a spec pipe really necessary?

I haven't been on 4cycle.com for a long time so please forgive me if these topics have been covered there.

Cheers,
_________________
John Matthews
Heartbeat Power, LLC.

[Steve Baker]

John

Because of the use of pump gas and a stock cylinder bore the cam needed upgraded to make more power.
Spec header so the pipe of the month would not exist and also RLV is the 2013 Gold Cup series sponsor.

Steve

[John Matthews]

Thanks Steve,

I'll have to build one of these motors and see how it does....

Anyone planning on using the package for club races?

John
_________________
John Matthews
Heartbeat Power, LLC.

[Steve Baker]

John,

I know of 4 clubs talking about adding these classes in Florida, NY and Ohio. We have built some of these engines and if you need any advise lets us know. Performance has been very equal on dyno for all of them. Should make for some close racing.

Steve