IJSBAIJSBA is pleased to release a semi-final draft of the 2015 Competition Rule Book.  IJSBA, initially, posted a draft on January 19, 2015.  IJSBA requested public comments for clarifications and suggestions to make clearer language consistent with the rule changes voted upon earlier this year.

IJSBA received several requests to change the language of 6.4.5 which has now been completed.  It was also pointed out that a provision for aftermarket valves and shims was inadvertently left in the 2016 Runabout Stock Rules.  These, along with missing language for Four Stroke engines in Modified Class language is presented below.

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6.4.5        Engine, Intercooler, and Oil Cooler water cooling systems may be modified or aftermarket. Additional water cooling lines and aftermarket water bypass fittings may be added. OEM water bypass fittings may be modified or relocated. All bypass fittings must be directed downward and/or rearward so as not to create a hazard for other riders. Additional cooling supply lines and fittings may be added to the pump. Pump water inlet covers and water strainers (filters) may be modified or aftermarket. Intercooler assembly/housing must remain OEM in stock class, additional cooling supply lines and bypass fittings may be added to the OEM Intercooler Housing. Water inlet covers that are removable from the engine block may be modified or aftermarket. Volume changes to OEM water supply fittings are not allowed. Existing fittings may be aftermarket or modified so long as the OEM thread diameter is maintained.  Fittings may not be added to the cylinder head, cylinder, or crankcase. Intercooler pressure relief valves (mechanical) are allowed for the purposes of regulating water pressure. Any valves used within the entire cooling system must be of the fixed type or automatic (e.g., thermostats, pressure regulators, etc.). Electronically controlled valves or water injections systems are not allowed unless originally equipped. Manually controlled devices (by any means of actuation) that alter the flow of cooling water during operation are not allowed. Cooling system flush kits are allowed.”

Updated to

6.4.5        Engine, Intercooler, and Oil Cooler water cooling systems may be modified or aftermarket. Additional water cooling lines and aftermarket water bypass fittings may be added. OEM water bypass fittings may be modified or relocated. All bypass fittings must be directed downward and/or rearward so as not to create a hazard for other riders. Additional cooling supply lines and fittings may be added to the pump. Pump water inlet covers and water strainers (filters) may be modified or aftermarket. Intercooler assembly/housing must remain OEM in stock class, additional cooling supply lines and bypass fittings may be added to the OEM Intercooler Housing. Water inlet covers that are removable from the engine block may be modified or aftermarket.  OEM dry fittings that tap into the water jacket may be modified or aftermarket and may accept water so long as the OEM opening is not enlarged. Volume changes to OEM water supply fittings are not allowed. Existing fittings may be aftermarket or modified so long as the OEM thread diameter is maintained.  Fittings may not be added to the cylinder head, cylinder, or crankcase. Intercooler pressure relief valves (mechanical) are allowed for the purposes of regulating water pressure. Any valves used within the entire cooling system must be of the fixed type or automatic (e.g., thermostats, pressure regulators, etc.). Electronically controlled valves or water injections systems are not allowed unless originally equipped. Manually controlled devices (by any means of actuation) that alter the flow of cooling water during operation are not allowed. Cooling system flush kits are allowed.”

This provision was removed from 2016 Stock Class Rules and applies to Runabout Rec Lites which shall use these rules in 2015:

“Intake and exhaust valves may be shimmed with OEM or aftermarket shims. Valves and valve seats are not restricted to OEM providing that any replacement valves or seats maintain the OEM weights and dimensions.

Also, missing language from Modified Class (GP) regarding Four Stroke engines was imported from Open Class Rules has been added to the end of the Modified Class Section (Section 9) of the printed Rule Book.

 

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A download of the draft form of the 2015 Rule Book here.
2015 IJSBA Rule Book Draft Semi Final

 

For any questions relating to the 2015 IJSBA Competition Rule Book, please email info@www.ijsba.com.

 

The rule book shall appear, in final form, online, next week.