what kind of hz are you peaking @ on 20 to 21psi? i live in slc ut and the air is so thin i can run 20 to 21 psi 1750hz with the settings @ 0,(i have added a little fuel in the 3k to 4300 area for the lean spot) my question really is when does boost cut come into play, i figure with such high elevation i can throw some race gas in up the boost,lean out a little & flow as much air as you sea level fellas are flowing. any thought or suggestions would be great.
my mods are 3" turbo back,buschur filter,mbc & afc2

 

Its going to depend on the air filter, and how clean it is..

BUT, 1600hz is around what my car peaks at with similar mods and a dirty filter.. Idle is around 25-35hz..

 

thanks for the response! what kinda time did you run @ 1600hz? i don't want to get my car tuned until i throw in the cams. would it richen things up a good amount if i put a fuel pump in?

 

It would richen things up marginally.. hard to say for sure since there are too many factors such as what your duty cycle is, how clean the injectors are, etc..

But I ran a 12.42 with an S-AFC at the time, Buschur exhaust, downpipe, filter, MBC @22psi through a aftermarket 3" catalytic converter..