| GTT250& GTT260 include a remap which can be scalled for either 380 or 450cc injectors. The Shrick cam requires more fuel than the stock cam. Using 450 injectors without scaling will usually benefit most cars by a reduction in fuel pressure. This is a better way to go about it as above around 17psi boost, fuel pressure at the rail maxes out with a stock FPR. Drop the pressure say 5psi and you can go to 22psi of boost before it maxes out. The lower pressure requires either more duration or larger orifice injectors to achieve the same AF ratio as before. | 
