yellowturbo

Like the topic say... in the instruction manual they say to turn the screw until the little ball stock moving. The call that the ''coarse'' adjustement if I remember. Thats the screw that the regulars models dont have and we turn with a really small allen key.

If I im right its to get a better spool time but if, by exemple, I get spike issues and I let more space to the little ball could it help the problem... ?

Im not sure what this feature really does ?



Thanks

yellowturbo

haha I can see that im not the only one that dont know this....

yellowturbo

no one messed with this little screw ?

theinfamouskonrad

bump cause i have the same boost controller. Never messed with that though. I have heard that you need to shake the boost controller or something like that to bleed it.

IHaveTurbos

It is the course adjustment screw just like on the standard HPBC.

This is the instructions striaght from TurboXS:

A d j usting the High Performance Boost Controller

Note, the vehicle will require a calibrated boost gauge to be fitted to the engine inlet manifold in order that the turbo boost pressure can be monitored while ad j ustment is carried out.

1/ The High Performance Boost Controller should have been pre-set as per the pre-set instruction above prior to installation of the boost controller to the vehicle.

2/ Identify the Fine A d j usting Screw located on the top of the boost controller. With the Fine A d j usting Screw initially fully closed (unable to be wound any further in the clockwise direction), wind the Fine A d j usting Screw three (3) full turns in the counter-clockwise direction. This will reduce the vehicle's turbo lag and increase the boost pressure by approximately one (1) to three (3) psi.

3/ Start increasing the boost pressure by winding the Course A d j usting Screw in the counter-clockwise direction. One (1) full turn of the Course A d j usting Screw will result in a two (2) to four (4) psi increase in boost pressure.

4/ Increase the boost pressure as close as possible to the desired boost pressure using the Course A d j usting Screw. Then use the Fine A d j usting Screw for final ad j ustment of the boost pressure. If you can achieve the desired boost pressure by ad j usting the Course A d j usting Screw only then there is no need to touch the Fine A d j usting Screw.

5/ The boost pressure can be decreased by winding the Course A d j usting Screw or the Fine A d j usting Screw in the clockwise direction. However, D O NOT close the Fine A d j usting Screw to be less than two (2) turns open from the fully closed position.

yellowturbo

so it mean that the course adjustement is the most important... and you do the small adjustement with the ****.

I was sure that it was the opposite !