I'm looking to get a turbo for my d15 89 crx. I've been looking online at places like homemade turbo for the best one to choose, but i dont know what the different turbo names mean. RHb5? T3/T4? 14b?

Also, what do the different sizes mean? I'm looking for a turbo that spools quickly. What numbers should I look for?

 

A 14b or t25 will spool faster than a t3/t4, but a t3/t4 will make more power at higher RPM.