Originally Posted by djp0623
Thanks everyone. I feel a bit better about the situation with these numbers, and talking to brain about the boost settings.
It turns out that I misunderstood wg open/closed duty. with normal and inverted selection. It was over boosting because I had my duty table set to 100% boost everywhere as opposed to 0%. I was set to normal instead of inverted. Now it is keeping boost at or near zero. Cars in the shop for transmission swap as I'm typing this.
So - I am having a similar problemish... ish I say because I don't think the waste gate can control my boost.
I have the GT2554r and the tube header from BEGi. With the wastegate adjustment set to virtually no preload(just enough to have the WG stiff).
I still push 12-14 psi. I don't think it's stuck or sticking... It moves freely when disconnected and moves properly with some effort when attached.
This is with no EBC in line.... My only purpose for the EBC was to help bring on the boost sooner.... I'm sure the WG is fully opened by the time I'm seeing 4 psi as is. My hope was to stop the WG from opening until I hit 7-10 psi and then let her fly open and try to hold it down around 12~14psi.
Any more than 14-15 psi and I'm sure to be in trouble.
Anyway, this situation has made tuning the EBC very confusing. It's hard to tell if its working or not because no matter what I do, the boost seems to come on slow till about 7 psi then it shoots to 10-11 and then climbs to 14.
My boost duty on closed loop bounces all over the place trying to control the boost like a frantic monkey.
using open loop so I can control the duty cycles directly and this seems to be working best... So I believe the EBC to be working properly, the PID code just can't handle not being able to control the boost...
Any ideas? Am I flat wrong?
Is there a reason that boost duty cannot be controlled by kpa vs rpm?
In the stead of TP% vs rpm of course.
This in my case would be PERFECT... Ben? lol