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#31155 E&O Appendix G

From Formula/Sports Racing Committee · Rule change

E&O Appendix G

#31155 from Formula/Sports Racing Committee · Rule change · TB 21-10 (2021-10 Fastrack)

In Appendix G.1, make changes as follows:
"Cylinder volume (displacement) =
3.1416 x bore x bore x stroke
4
Engine displacement = Cylinder volume times number of cylinders
SCCA Fastrack News October2021 Page 2
Compression ratio = V1 + V2
V2

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Where V1 is total volume of one cylinder: sum of swept plus unswept volumes. V2 is enclosed volume existing in a
cylinder/cylinder head with the piston at its closest approach to the cylinder head.
Engine displacement = Cylinder volume times number of cylinders
Compression ratio = V1 + V2
V2
Where V1 is total volume of one cylinder
V2 is volume of space above piston at top of stroke
Piston speed (ft. per min.) = 2 x RPM x stroke in feet"