Gts does not hold boost

[chrisgero]

Would anyone know what is happening?

I just got a monster intercooler professionally installed. When I up the boost to 14lb the car feels like it won't run the 14lb. My mechanic claims the car is not holding the boost, he also said he had another 2.5ltr GTS, was holding 14lb boost. The same mods, 3inch exhaust, panel filter and the 800 x 300 x 76mm intercooler.

He suggested that I get a piggyback system for about $700 and he would have it installed, just for fuel. What if I get a bigger fuel pump, could this solve the problem.

Has anyone had this problem before and what did you do to fix the problem, any tips.

Any suggestions.

:whip:

[krzysiu]

PIggy back for fuel for $700? tell him to get lost for that price and save the extra 300 for a powerfc. I take it you dont have a boost gauge?

[chrisgero]

PIggy back for fuel for $700? tell him to get lost for that price and save the extra 300 for a powerfc. I take it you dont have a boost gauge?

I do have a boost gauge, he even put his one on and he said it's not holding 14lb, he offered to get me a piggyback system installed for $700.

I also read other threads about getting the bigger fuel pump. The car before the service when i drove it slightly hard wouldn't spin, now i take off and drive it hard in 1st the thing screams. But it wont hold the boost, it feels as it is jerking up high revs.

[krzysiu]

When you say it doesnt hold, how much does it drop by?

[carlo]

Are you using the stock boost controller.. if you are then thats your problem. The stock boost controller is junk, mine did the same thing.

My solution was a Apexi AVC-R configured on a dyno. $700 for a piggy back ecu is a joke, it wont fix your issue and is a bandaid. Get your self a powerFC for $1000

Honestly.. Step 1. Go to a decent workshop and ask them about electronic boost controllers. Their is a few brands, such as the Apexi AVC-R, Turbosmart E-Boost & the Greddy one (forgot model).

Step 2. Have this installed by someone who has done it on a skyline before, that way they run it on a dyno to setup the controller correct. If you do all of this then you should not have any major issues and your car will be alot more smooth to drive.

Their is alot of workshops who can help with this, no doubt everyone will come along and recomend one. I installed my AVC-R my self and had Ben at unique Autosports configure it correctly. They also do other brands.

[chrisgero]

Thanks for this info,

I will be looking for an electronic boost controller within the Sydney region. I got rid oy my first boost controller as a result of it not boosting, now this one boosts but it won't keep the power on 14lb, the car feels as if it is struggling to keep 14lb, like it's been held back as you are powering it on, no back firing.

One of my WRX mates told me to buy an electronic boost controller and i thought he was talking "Gibberish". I know now.

I will try this idea out,

Thanks