As many of you may know, social media blew up a few months ago regarding claims that some competitors and “engine tuners” had discovered a way to “twist” the camshaft inside the engines without breaking the seals. Although we have stayed silent on this potential issue up until now, our team has been actively looking for a solution to prevent this.
Cup Karts of North America, a large road course series, spent months gathering data from multiple sources. Hundreds of camshafts were measured and documented from both new and well-used engines, as well as engines from multiple years of production. They also asked key partners from within the industry to provide their own findings of camshaft measurements from their own engines and/or engines they had come through their shops.
The result of this effort is a huge amount of information to base the creation of an allowable tolerance that Racing Promotions (aka Snydersville Raceway) and Oreville Kart Club will now use to inspect engines with:
- In addition to the measurements in Briggs & Stratton 206 rules section 28 – Camshaft Profile Limits Rules:
- Centerline of the INTAKE lobe must measure 105°-107°.
This rule will take effect immediately. We will also outline the procedure in which our tech team will perform this check, and how disqualifications or suspensions will be handled for engines found not to be compliant with this rule.
We know this announcement comes very close to race season and in a time when engine are hard to get, but unless you (or your engine tuner) have been messing around with the camshaft, you will have nothing to worry about.
