Originally Posted by
treekiller
there is a small error in the classing, a 1998cc evo or wrx could be considered under 3litre...
This isn't NASCAR, and you're not Smokey Yunick...if it makes you feel better, pretend it's 1.549 rounded to 1.5 for print.
many rally rules use a 1.7 for petrol and 1.5 for diesel forced induction....
If someone with blown Rabbit Diesel starts showing up regularly and complains about being spanked by turbo Miatas, we'll revisit.
...in addition a .8 multiplier for Pushrod engines. (so the big v6 GM/ford cars can be under 3 litre) also a 1.5 is used for a rotary so a turbo rotary motor would be. 1.3x1.5x1.7 = 3.3 litre. much more reasonable set of groupings.
Someone take away Jeff's calculator....