I have a 2001 prelude turbo. My question is that I am running a MSD 6BTM, how much should the timing be retarded? Also does it depend on how much boost you are running?

 

Yes it does depend on how much boost your running.

 

let say 8psi

 

h22 timing should be about 4deg more advance than you would see in a b series. perhaps even more in some parts of the map.

for instance 24deg total advance at 8psi and 7000rpm is about right.
keep to about 12:1 air fuel to be safe.