850 T5 - Wastegate Adjustment Safe or not?

[Curious]

Folks, I'm sure this topic has been discussed before but please hear me out...

I've reviewed IPD's instructions for adjusting the base wastegate pressure setting at:

http://www.ipdusa.com/pdf/wastegate_adj ... _turbo.pdf

What I am concerned about is that almost every independent mechanic I've asked to do this adjustment won't touch it. Yet, IPD and virtually every post out there claims this is safe if you don't go beyond 6-8PSI. What am I missing?

Also, has anyone had engine or turbo problems with this procedure? About the only issue that I see is that the Turbo life may be shortended because the turbo is being forced to hold pressure for a longer time.

Please let me know your thoughts.

[Tsquared]

What I am concerned about is that almost every independent mechanic I've asked to do this adjustment won't touch it. Yet, IPD and virtually every post out there claims this is safe if you don't go beyond 6-8PSI. What am I missing?

Also, has anyone had engine or turbo problems with this procedure? About the only issue that I see is that the Turbo life may be shortended because the turbo is being forced to hold pressure for a longer time.

The liability is what the mechanics are worried about. You can go to a shop that specializes in preformance and speed and they will have a disclaimer on the work order you sign. The waste gate mod on a turbo is the easiest way to get more performance out of your system - water injection is next.

The turbo and engine will wear faster but you are also driving it harder. You also run the chance of something coming apart and blowing the engine/turbo.

T

[Curious]

Thanks Tsquared.

After further research I have one follow-up question. There have been a few but very vocal concerns in the posts regarding the increased possibility for lean conditions. I know enough to know that this can be disasterous for the engine but am confused as to the controversy due to lack of technical knowledge:
--Some imply that the lean condition AT LOWER RPMS (which is where the mod is supposed to help) is really not a factor because the stock ECU adjusts fuel/air mixture just fine - again AT LOWER RPMS.
-- Others say that the lean condition is a problem - period.

Question: Can anyone please comment on the above or lean conditions in general when using a STOCK ECU and the wastegate adjusted ever so slight - say 6psi MAX?

Thanks.

What I am concerned about is that almost every independent mechanic I've asked to do this adjustment won't touch it. Yet, IPD and virtually every post out there claims this is safe if you don't go beyond 6-8PSI. What am I missing?

Also, has anyone had engine or turbo problems with this procedure? About the only issue that I see is that the Turbo life may be shortended because the turbo is being forced to hold pressure for a longer time.

The liability is what the mechanics are worried about. You can go to a shop that specializes in preformance and speed and they will have a disclaimer on the work order you sign. The waste gate mod on a turbo is the easiest way to get more performance out of your system - water injection is next.

The turbo and engine will wear faster but you are also driving it harder. You also run the chance of something coming apart and blowing the engine/turbo.

T