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Boost Controller Issue

illusiVe

By illusiVe,
in Engines & Forced Induction

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illusiVe Proficient

illusiVe

Posted
Posted (edited)

Car: MANUAL ER34 GTT

boost controller : dual stage Turbosmart

ok, i had it all wired up for low and high, low is set to 5psi, high was set to 9psi.

i had it dyno'd on the weekend, but we couldnt get boost to go past 9.5psi.

i was told by the tuner that i had it installed incorrectly... but when i installed it the way he suggested, i had unlimited boost (didnt matter if it was on low or high, or settings on the controller itself)

at the end of it i was pulling 172.3 rwkw on 9 psi.

my AFR were 14.5-8:1 on nice putter @ 100kms.. but under boost it went to about 10:1

its definatly not exhaust restriction because when i have unlimited boost i can hit 15psi.

picture shows how i THINK its wired up from memory

big help to everyone in advance!!

post-12759-1147240225.jpg

Edited by illusiVe
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illusiVe Proficient

illusiVe

Posted
  • Author
Posted (edited)

if anyone with a stock GTT and hasnt moved the stock T piece between the actuator, wastegate, turbo intake. etc.

if they can take a high res pic.. so i can attempt rewiring it.. it seems i have a tube or two left over.

as i was saying, i've also tried blocking off the tube coming from the ? (cant remember what thats from) and then just putting the boost controller between the Turbo and the wastegate (arrow points towards gate)

Edited by illusiVe
Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted (edited)

unplug the hoses to the factory solenoid DON'T UNPLUG THE WIRES TO IT...

and simply put your dual stage between it... easy!

I don't recommend you use the turbosmart Dual stage.. I had bad experiences with it... it spikes...

and that top hose in your diagram, thats goes to your intercooler piping man.. don't block it.. you need it...

Edited by johnnilicte
BHDave Grand Master

BHDave

Posted
Posted

install the dual stage tee in between the actuator and the other tee that runs to the factory boost controller.

Leave the rest alone.

The factory wastegate is fairly soft so by removing the factory solenoid you will end up with a lower base boost setting that you have to make up for by bleeding more air via the dual stage.

Does the 34 still have the factory stepped low/high boost thing happening? If so then do a search for the factory boost controller mod that will set a constant boost level for more consistant results.

illusiVe Proficient

illusiVe

Posted
  • Author
Posted

hey guys... just realised whats going on.......................... i think

I've forgotten how the stock setup goes for my GTT

could someone who does NOT have a boost controller show me factory wise the setup from the T piece, actuator, turbo, intercooler piping, wastegate.

if i simply put it between the turbo + wastegate i have unlimited boost (up to 1.1bar...furthest ive had my foot down), how i have it installed at the moment it works fine, can completely control boost... just not get it above 9.5psi

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