I'm building right now a Fiat Uno mk2 sx for a rally.
Engine bore and stroke is 80.5x67.4
I want to replace injection for bike carbs, put x1/9 1500 euro spec cam, 39.5 intake valves, make a new 4-1 header, skim and polish the head.
The question is how light should be a flywheel to keep some torque?