does the 93 octane chip give me another psi or two over the 91 octane chip? or is it my n75j

 

93 and 91 chips give the same boost. Timing and fuel deliveryare optimized differently for each. A 1.1 bar chip is a 1.1 bar chip no matter which octane versioin you get. The N75 will just up your boost a little (but not dangerously where you mightrun lean)and it alsoreduces spiking.