I'm not really a N/A guy but from what I've heard you can gain about (rough estimate) 10hp for every 1 full point you bump your compression. So going from 10.2:1 to 11.2:1 should net you about 10hp. Now that all depends on tuning and what not. Yo umay gain 3hp or you may gain 12hp.....tuning plays a big role in the outcome.