torquefan

It should have had an adjustable boost elbow installed in the wastegate actuator line when the injectors were done, or it will still be limited to the factory wastegate setting.

Albino99

A boost elbow is installed at the compressor housing (wastegate actuator line). This elbow was put in when the Edge EZ was installed. It has a tiny orifice inside.

SIXSLUG

How do you adjust the boost elbow?

AlpineRAM

The stock EZ elbow is not adjustable if I recall this correctly.

Sometimes the spring in the wastegate actuator gets weak over time and leads to a low boost situation. A quick test for the chargers with a rubber hose to the wastegate actuator is to either remove the hose temporarily or to crimp it closed with artery forceps for the test.
If it gets better you know that the problem is at least partially caused by the wastegate opening at too low pressure.

SIXSLUG

@Alpine I have an adjustable boost elbow, just never set it....

AlpineRAM

The adjustable elbow comes in 2 variants. The more common one works like this:
Boost air goes through a calibrated orifice, then through a chamber with an adjustable bleed to the diaphragm. The more the bleed is opened the less boost reaches the diaphragm of the wastegate actuator.

Setting the elbow is a bit of playing with boost and EGT, you should not go over 35 psi with the HX35, depending on the rest of your mods even lower boost can be desirable- I like to tune for just enough air to clean up the exhaust under full power.

SIXSLUG

So in will reduce the waste gate closing early?

AlpineRAM

The more you open the bleed the less the boost will affect the wastegate- meaning more boost until the wastegate dumps the exhaust around the turbine.

Naturally there is a point where the exhaust gas pressure opens the wastegate on it's own, but then you are way beyond the usable flow characteristics of the charger.

A working wastegate will not influence engine characteristics up to a set boost level (21psi stock),

SIXSLUG

Thanks, I get around 25 psi where it's at but a good blow of smoke around 2500 rpm. I don't need the smoke, just want the power range. I need to get my injectors in....Didn't mean to hijack the thread Albino99...nobody responded to my post.

AlpineRAM

OK, 25 would be just about right with a mid box and stock injectors.
(Running higher boost than necessary robs power and fuel efficiency- think more air needs to be pumped through all these pipes, valves etc)

Maybe try to losen the adjuster a bit- but caveat!

I'd do it like this- turn the adjuster in till fully seated while counting the turns. Then remove the adjuster, add fresh threadlocker, turn in till seated, turn out original value plus one turn..

DAMHIK!

SIXSLUG

Thanks Alp, I'll give it a shot.

AlpineRAM

Take a good look at your EGTs while tuning- increasing boost will net you lower EGT to a point- when EGT rises again you know you have gone too far and will pay the penalty at the fueling station.