boost spike? fuel cut? 0r am I a freak?

[ulti]

So im still convinced my car is not performing at its best, feels slow and doggy, however after installing a manual boost controller ive been able to get my car to spike 12~ psi, however it drops off pretty fast it seems. I just bought the car. I'm under the assumption that its all stock. Save for the fuel pump. Did boost leak test and no leaks. Turbo is t28.

Also while punching it today, it kinda bogged out at about 5500 rpms, almost like it was lacking fuel. not sure the injectors are but i have a good fuel pump(walbro 255)

anyonehave ideas to test if my injectors are good? and whats common boost curve for our cars plzzzz

[Hijacker]

You can't really do a flow test on your own unless you have a flow bench to plug the injectors to. You could always send them off for testing. I would also consider testing your fuel pressure (which you CAN do on your own) to make sure it's working properly. Check your spark plugs for any fouling, and I would consider replacing them if they're looking old.

Lastly, has the MAF been upgraded? I couldn't imagine a stock MAF handling a T28 putting out 12 psi. If it's still stock, you're probably feeling like you're lacking fuel because you've maxed out the amount of usable fuel from your management.

[ulti]

ok thanks for the help, i did replace the plugs so they are new. I was going to check the fuel pressure, autozone has a pressure tester i can rent. But also i was just trying to get it to run at 7 psi(The factory setting) and couldnt even get it to hit that. thats why i added the boost controller to see if i can get more boost and it worked. wat maf should i upgrade to if i plan to run around 12psi. z32?

[PyR0NiAk]

Sounds like the spring in your wastegate is bad. This is why you would need the boost controller to hold boost. Z32 is the easiest option. You'll need some form of engine management to run the Z32 maf.

[Morph]

Cheaper fix would be to get an HKS actuator, or swap a used actuator on there and hit your 7PSI mark. I have a T28 on my stock sr and dont have any fuel issues.