what is the difference between a h22 and h23 tranny?

^^^^ --- see subject

H23 tranny has longer gearing, better suited for high power turbo engines. I haven't inclined myself enough to give you numbers.

http://www.92lude.com/carspecs.html
This will tell you the specs on the Preludes S SI Vtec

sometimes i get pissed because i feel like my h22 lude has enough motor to go 160+ but is geared so bottom end that it wont. theres trade offs to everything unless youve got enough money i guess...