Need Help With Car Boost

[Aler]

Hi all,

this is my first topic

anyways, I bought a skyline gtst 06 around 4 months ago, the first thing I've done to it is tuning coz it wasn't tuned.

the owner doesn't know much about the mods that were installed in the car coz he is the second owner.

the car has, as far as I know:

power FC

E-boost 2 controller

adjustable shock absorbers

swaybar

splitfire coils

HKS bov

HKS intercooler

GT-RS turbo

3" exhaust

apexi air filter

18" wheels

not sure how can i check if the injectors and fuel pump are stock or performance ones ( if anyone know how check them please let me know )

after tuning the car, i ended up with 223 rwkw

my problem is, when i step on it "full throttle" the boost jumps to 13.8 at around 3000 rpm then suddenly goes down to 9.5 psi then starts to increase till 12PSI at 6800 rpm, it stays at 9.5 between 3000 rpm till 4500 rpm.

I am not sure if this is normal or is there a problem with it because it is my first time to mod a forced induction car.

but i have a feeling that it has a problem.

[Aler]

forgot to mention, it has a havy duty clutch as will

sory for any grammar or spelling mistakes "English is my second language" and I am not good at it lol

[Ultimategtr]

sounds like perhaps a boost controller setup/fine tuning issue. Do you know where the eboost is getting the boost source from?

It could be something as simple as decreasing the gain on your eboost, as generally, if you set the gain higher then or equal to the start boost, you will/might get some surge..

[Aler]

sounds like perhaps a boost controller setup/fine tuning issue. Do you know where the eboost is getting the boost source from?

It could be something as simple as decreasing the gain on your eboost, as generally, if you set the gain higher then or equal to the start boost, you will/might get some surge..

thanks for the reply,

looks like it gets the pressure from the wastegate.

After doing some research, i think that the eboost is not set up properly. The guy who have connected the eboost did the wiring, turned it on, set the some figures without trying it out and said "that should do, you dont need multiple setups"

so, I got my Sp set to 30.

Sn set to 30

Gp set to 10.0

If you know anything about setting up the eboost 2 please let me know what these things mean and what should i do.

Aler