A hypothetical question...
Lets imagine an engine came up for grabs for my MX5/Miata cheap.
(1990, 1600cc, inline4, longtitudinally mounted, fuel injection)
Lets imagine I wanted to re-build the engine, replacing worn parts piston rings, bearings, gaskets etc...
So far all of the work could be done at home (apart from honing the bores).
But what modifications could I consider in the name of economy?
Bearing in mind that the lightening of any moving parts may require some specialist balancing...
Reducing friction seems logical, so bearings would come under scrutiny.
Also improving airflow.
What else could I consider...?
