11psi on A J2 ecu?

[Guest]

I put J2 into my V5 today non sti loom solenoid etc but I wouldnt have thought that would matter. Runs about 12psi on A8 non sti ecu. Nothing else has changed but defo sti ecu as rev cut is over 8k. Any ideas? Cant see how the restrictor would limit it but maybe? Not worried about running 16psi as just using as interim but wondering why?

[Stoffa]

I\'ve got an idea, stop trying to use factory ECU\'s on a modified car hahaha

G4 FTW!!!

[Guest]

I am casually fostering a firm hatred for you.

Runs bloody well on 11psi though just later in the rev range. Defo quicker than the stock V5 setup with vf23 on 14.5psi.

[pedro]

G4 plug in...$1000 of trademe.

Tune...$660 + gst..

All good... 8) ;D :-* ....

[Guest]

Ive got the G4 I just dont have the coin to tune it or I would.

[madmike]

If you have the link stop fucken around with it and save for the tune.

If i see another one of these threads from you your gonna get a warning.

[Guest]

Helpful...so no one has an idea as to why a J2 would boost low? I dont understand how the link has anything to do with it. These are legitimate questions I wasnt the only one to ask about running a mac valve oninstead of factory on a factory ecu the other guy got ignored also.

[Timmah]

V5 boost solenoid set up for only 11psi? *Shrug*

[Guest]

Not the restrictor and solenoid works same plumbed both ways. No funny boost leak idle and lines look fine. Will leave it as is till get tune unless someone has another smart idea to try.

For future reference removing restrictor made it way slower but still made the same boost.

[Pappu1]

Is the map sensor same between the 2?

Scan for any code?

Perhaps limp mode?

Have u got an Sti to plug in to and see if makes good boost?

Is the wiring exactly Same on Rex and Sti? I think there are some differences.....

I think the restrictor pill maybe different between Rex and Sti as that Wud easily explain low boost....

[Guest]

 SP00N said:

Is the map sensor same between the 2?

Scan for any code?

Perhaps limp mode?

Have u got an Sti to plug in to and see if makes good boost?

Is the wiring exactly Same on Rex and Sti? I think there are some differences.....

I think the restrictor pill maybe different between Rex and Sti as that Wud easily explain low boost....

I reset ecu to try that no codes no cel.

I think the restrictor is different but only comes to play bringing on boost not how much full boost is...I think anyway.

Not too worried tbh just interested dont like things getting the better of me.

[Pappu1]

restrictor affects full boost value

for same bleed duty cycle on the solenoid, a bigger hole restrictor will get oless boost compared to a smaller hole restrictor

in newer models, i know for a fact the sti have a thinner hole restricter...

maybe same for the j2 equiped cars too....

[Stoffa]

Are you running internal wastegate? or if external is 11psi wastegate pressure? if not then I would say the boost pill needs to be "adjusted"

[Guest]

Its the vf23 internal I put onto the vf22 as it didnt come with one. They should be the same? I tried it without restrictor in the line and got the same boost just slower to come up to full boost. Only other restrictors Ive got are TD04 ones. If it is the restrictor it can stay how it is its quick enough for now.