Engine Rules Adjusted for CSR

February 23, 2005

A Technical Service Bulletin (Acrobat file) will appear in the April edition of SCCA's FasTrack with the changes effective March 1, 2005.

CSR engine specification listed in the Sports Racer Category of the 2005 GCR have been changed, primarily to allow fuel injection on almost all choices, and to make competitive adjustments to minimum weights.

CSR engine choices remain vast with twenty types of alternatives listed.

The changes are noted in red in the table below:

Fuel Injection allowed at 25 lb. penalty as shown.

Engine Type or Specific Engine Max Displ. (cc) Head Type Max Valves per Cyl. Carb or Fuel Injection Carbed Weight (lbs) w/ driver FI Weight (lbs) w/ driver Notes
4 cycle Motorcycle -based 1310 1300 UR 4 UR 1150 1100 1175 1125  
4 cycle Motorcycle -based 1400 UR 4 UR 1150 1175 new listing
4 cycle 1450 OHC Cross-flow 2 Carbs only
1200 NA
4 cycle Motorcycle -based 1615 UR 4 42mm venturis or restrictors 1250 1200 1275 1225  
Toyota 4AGE- series DOHC 1615 Cross-flow 4 Carbs only with 42mm venturis 1300 NA
see rules
VW 1.8L 1835 UR 2 2 UR Carbs or FI with 37mm venturis restrictors 1260 1200 1285 1225 see rules
N/A Bridge Port - One IDA 48mm w/ 34mm venturi, or Fuel Injection w/ 34mm restrictors per port 1300 NA
13 other engine choices             No change - see rules

UR = Unrestricted
FI = Fuel Injection
Strike through letters indicate text that was removed.
Black letters indicates text that was added.

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