i just tuned the red box apc today. i turned the f pot 1/4 turn. the p pot a little less than 1/4 turn. and yes i touched the k pot! if you dont know what your doing and you mess with the k pot you will gernade your engine! anyway the difference is like night and day
now when i hit 17+psi it holds it through all the gears ,no pressure drop noticed and a higher degree of knock protection. i know because i have the led hooked up on pin 19 and
radio +12v.it lights up when tapping on block. but it didnt light on a 17psi run up hill in 3rd gear thats great.

 

bstpwd,

If you can find some 100 ^ octane or run an octane additive it'll really sing it keeps the knock down and it will boost even higher!

 

i run vp fuel q16 constantly yes it loves it it is nice having the vp distibution center down the road