i have a 1991 mazda protege with a mildly built daul over head cam motor with a t4 turbo upgrade. I am pushing around 9 psi out of it right now but am wanting a little more boost out of it. I have a Apexi neo tuner but not familiar with them. If anyone has any suggestions or tips would be much appreciated.

 

well, first thing is more boost. you need to get a boost controller to turn up the boost numbers. nothing special required. manual is fine. next is just tuning the afr's correctly. if you are on the stock map sensor, you need to keep it below 14psi. at that level, keep the afr's around 11.

 

i have a innovate motion system on it and a apexi neo tuner and it has a aftermarkey o2 sesor as well

 

find someone who can show you how to run it, for example the new genesis coupe there are two well knowen programers used, the cmd and the poweraxle. out of twelve cars 11 used the cmd and 1 used the poweraxle. all 11 cmd tuned cars blew there motors, the reason why the car wasn't tuned properly all they did was punch in numbers and used maps that were designed by some guy hundreds of miles away. but when you use these programers you need to find a tuner that can map a custom map for you with what parts are on your car in mind. I'm sure you know all of these you seem to have a pretty good set up, but honestly when it comes to tuning cars i leave it to the guys with dyno's.