13b s4 na tuning
 

i have an 88 rx7 gxl that im going to probably be puting a different s4 na engine in and i want to know how to tune it when i put it in. i know how to adjust the idle but i want to know how to adjust the lean to ritch and timing.please be very spacific when explaning the timing because i have no idea how to use a timing light or what im sappost to point it at or what to look for or how to adjust the cas based on what i see .and can i turn the cas wile the cars running or do i have to shut it off.