The quick, cheap and easy way is to do a few mods. The ram air post on here would be a good power increase and cost less than $30. You can also cut off one of your three mufflers. Another post on here outlines that (chop + pipe +tip =>&100). You can also put premium gas in it, upgrade the sparkplugs, advance timing, and finally put a toggle switch on your alternator.
Cheap muffler delete 0-3%hp increase
Ram air 1-6%
K&N filter 0-2%
Spark plugs 0-1%
Advance timing 0-2%
93octane gas 0-4%
Alternator delete/toggle. 1-2% (estimated .3hp-.5hp while under load)
Later=?
Shift light (2stage show vetec and shift rpm).
Wait for ECU upgrade and under drive pulley kit.
Lower compression with thinner head gasket.
Port polish intake and head.
Cam gears.
Upgrade valves to titanium.
1) Ram Air [rolleyes]
2) K&N nothing wrong with that
3) Don't bother with Spark Plugs at this point.
4&5) Higher octane gas won't make more power alone. It will give you the ability to run more timing which is were the power increase will come from.
6) Alternator Delete? Really? That's digging pretty deep for HP.
8) "vetec"??? For one its called VTEC and its used in Honda's!
9) If your not running boost why the hell do you want to lower the compression? Also, running a thinner head gasket will decrease the volume of the cylinders which will result in an INCREASE in compression.
Anyways, I think what I'm getting at here its, its pretty obvious your still learning so I would do a little more research before you start messing with anything.
OP, whoever told you that this engine won't mod well because of the high compression is just plain stupid. The ability to run higher cylinder pressures on lower octane fuels is a benefit of Direct Injection. I honestly don't want to explain it all over again as I have a few time already.