I'd like to step in here and explain an SR20 bottom end can support roughly 550-600whp.
A stock Honda bottom end is about 400 or so...

NOT TO EVEN MENTION.... cast pistons which are in Hondas do not like detonation. ANY detonation at that much whp, and you will melt them. To go more further, any detonation at all can damage a cast piston.

I believe SR's are high temp cast, and are very resistant to detonation. If you can't afford to buy forged internals, don't expect to be making 400whp.