it's about $800 for a complete H22 head and an ECU... so for $800, you gain 50-60 more horses, depending on the state of tuning you go with.

but if you go turbo, it'll cost you at least $2500 for the Greddy kit which will net you 50hp, or $3000 for any other kit to net you about 80hp.

none of the kits on the market have proper fuel tuning to make good power on the prelude. you'll have to go with an alternative system to make better power.

besides, on a stock H22 or H23 block, you're pushing the limit at 7-8psi, which can be as good as 130+hp when tuned properly with a good fuel and ignition controller, or as low as 70hp when used with a cheap fuel management unit.

so if you didnt have the funds to go turbo plus get a real engine management unit, you'll make little more power than you would have with a head swap, and pais 3 times as much.

plus, obviously a headswap will be more realiable, as it's cheaper so you can afford to do it right the first time.

I have an H23 VTEC. runs fine.