Changing The Wastegate Actuator

[ryan_04]

bit of a thread mine but 1st half of this vid explains it well

[Ciaran]

Good vid, basically

[MA91CK]

Pretty much obviously a good vid, basically

[camisole]

Interesting reading from all

Recently put my car on the dyne for a tune as it has had all the usual mods fitted, cooler, full exhaust, pump, injectors. The tuners have told me it is over boosting and I need to replace the waste gate as it's spiking to mid twenty's in boost and keeps popping the air intake off the throttle body, I am no expert when it comes to forced induction but any help would be great help.

Cheers

[MA91CK]

If you have a full exhaust chances are it will overboost as the Watergate now cannot keep up so the excess air goes into your engine... Not good when the same amount of fuel that goes in for 12 goes in for 25. Basically ask for a port job and bigger flapper. Only way to stop it mate.

[potty]

hi all, just been reading some of these posts and my question is I got 04 ba xr6t running 14psi and car is surging when I put my boot into it, I still have a standard actuator on turbo, would I be losing boost through the actuator and causing it to surge.

[FiftyOne]

Actually, if I can hijack for a moment, running a bigger pressure (spring) and you want to drive around like a sane person 99% of the time, how does this effect the overall drivability of the car? And how does it relate to how the boost controller map is set? I assume that the map needs to be changed as to not make the turbo spool like crazy when your not pushing (or become too knife edge between wanting to spool up at inopertune times)

[potty]

and this helped how!!!!!!

[oplock27]

pulled my turbo off to put new studs/nuts in and im tossing up whether to put on a 12psi actuator or leave the stock one. currently flash tuned at 12psi with the stock actuator so I imagine putting a 12psi actuator in and connecting via boost solenoid could see some major overboosting seeing as ecu still assuming stock actuator spring rate. thinking of bypassing solenoid and letting new actuator be controled directly from vac line from compressor so should open at 12 (or thereabout) just wondering how much boost leak will occur before 12psi and if this can be set by the preload on the arm. appreciate your advice. cheers

Edited 31/05/14 01:39 PM by oplock27

[ratter]

if your going to do something do it properly or not at all