Here's a question for the masses...

What makes the CX engine so slow? (1992 Civic CX HB)

Is it the block (pistons etc.)?
Is it the head?
Is it the intake/FI?
Is it just the high ratio tranny (5spd)?

I want to do something to pep this little beast up a bit, without spending a lot. (Building a race motor this winter, woo hoo for the EP car.(not the CX).

tanx