Im trying to tune my boost using MrFred's ecu based boost control method and Evo Kid's 3 port boost solenoid method with the grimmspeed solenoid. I've attached the tables that are currently on the car and a log of testing the methods out. Notice i have my wgdc set pretty low and my low error correction zeroed out. When I was driving I could only get to 50% throttle before my boost was over my target. It's also showing the wdgc is maxing out. How can that be if the max i have the wgdc set to is 20%? Shouldn't my boost be way lower than it is with these settings?

 

I should also note that I've had the same problems with just using the stock boost lines and solenoid. Thats why i switched to a 3 port. But same Ting

 

bump

 

If you had the problem before the 3port you should check the wastegate make sure it is not getting stuck. also double check your vac lines. also when tuning the boost it is best to set the error correction to zero so that you will fully rely on you wgdc. also did you replace your vac hoses when you switched to 3port?

 

i tested the wg acutator before, it would hold about 15 psi. vac lines are brand new silicone. i left the high error corrections in there just incase made too much boost. but it doesn't matter anyway cause it seems like the ecu isn't listening to the wgdc table. I'm using the high gear tables. Since the high/low crossover is 2900rpm/mph the low is basically disabled isn't it? Or do i need to lower all of those tables as well?

 

I think thats backwards personally but I could be wrong.

Your log doesn't show any wastegate correction happening either which is a concern. What rom id is this for anyways?

 

it probably is the other way around and I will kick myself if it is. I just assumed since the base boost #1 table says that i should adjust all high gear tables. My rom is 96940011

 

Did you remove the restrictor pills in the vac lines?

 

yes

 

Double check the vacuum lines going to the 3 port. Make sure they are setup correctly. Basically if you pull the vac line off the turbo housing and blow through it the air should be going to the WGA on the 3 port interrupt style solenoids( GM Grimmspeed etc ) unpowered. under load the solenoid diverts the air over to the turbo inlet pipe

Check the preload on the WG. Factory preload is ~ 1/2 of the pin diameter. You should have to pull the wga arm up ~1/8" to get it onto the flapper pin.

Finally check the electrical connects to the 3 port. if it doesnt get power signal from the ecu you will rapidly build boost and then blow the WG open if you have disabled the boost cut in the ecu

 

Double check the vacuum lines going to the 3 port. Make sure they are setup correctly. Basically if you pull the vac line off the turbo housing and blow through it the air should be going to the WGA on the 3 port interrupt style solenoids( GM Grimmspeed etc ) unpowered. under load the solenoid diverts the air over to the turbo inlet pipe

Check the preload on the WG. Factory preload is ~ 1/2 of the pin diameter. You should have to pull the wga arm up ~1/8" to get it onto the flapper pin.

Finally check the electrical connects to the 3 port. if it doesnt get power signal from the ecu you will rapidly build boost and then blow the WG open if you have disabled the boost cut in the ecu

You have the boost cut set to 290 load. That is very high. Set it to 230 and see if you hit boost cut.

 

Wrc-lvr, those are all good suggestions. But, they still don't explain why I'm logging a wgdc that doesn't coincide with the wgdc tables. I think the next thing I have to do is make the high and low gear tables identical. Here is a question. When logging wgdc, is it logging the actual signal from the ecu or is it somehow logging feedback from the wg actuator?

 

signal from the ecu it can't get feedback from the device really only if its an open circuit or not.

 

If you blow air into the solenoid (from turbo port connect) it should not allow air out the port that goes directly to wastegate. When you apply 12v to solenoid you wll get air. I left hoses connected to solenoid and tested this way. I also bought a deluxe mityvac to check pressure on wastegate.

Good luck

 

That's what I figured. I had to ask.

So let me try to understand the wgdc table. It is base wgdc not max. Then the base gets adjusted based on the different correcting logic's in the ecu. So are there any tables that can raise the wgdc other than TBEC?