LNF WGDC hypothetical question

[oldskool]

So I'm installing a bigger turbo this weekend (EFR 6758), and I want to start tuning at a relatively low boost pressure. The problem is, I think the WG canister that comes with the turbo allows 15-17 psi at the lowest rod setting. It is the "high pressure" canister. So, I'm thinking at ~17 psi or so, it should be at close to the same airflow (based on searching dyno numbers) as the stocker at the 21-22 psi I'm running now.

My question is if I zero out all of the WG control tables and set a max pressure limit of like 18 psi, will the PCM allow the turbo to just "run off the wastegate pressure" and essentially command 0% WGDC? After all, the controller can only add boost not subtract it right? I understand that there are other implications possibly in timing advance and/or ETC response, but as I starting point I want to be at as low a pressure as possible. I also understand I may be initially sacrificing some spool up. But all this aside, IF my DALs are adequate to request the airflow at the wastegate pressure, is this possibly an acceptable way to start tuning the boost curve on a bigger turbo? I don't want to be one of the guys that starts at 26 psi and works his way DOWN to where he wants to be lol.

[projectlnf]

So I'm installing a bigger turbo this weekend (EFR 6758), and I want to start tuning at a relatively low boost pressure. The problem is, I think the WG canister that comes with the turbo allows 15-17 psi at the lowest rod setting. It is the "high pressure" canister. So, I'm thinking at ~17 psi or so, it should be at close to the same airflow (based on searching dyno numbers) as the stocker at the 21-22 psi I'm running now.

My question is if I zero out all of the WG control tables and set a max pressure limit of like 18 psi, will the PCM allow the turbo to just "run off the wastegate pressure" and essentially command 0% WGDC? After all, the controller can only add boost not subtract it right? I understand that there are other implications possibly in timing advance and/or ETC response, but as I starting point I want to be at as low a pressure as possible. I also understand I may be initially sacrificing some spool up. But all this aside, IF my DALs are adequate to request the airflow at the wastegate pressure, is this possibly an acceptable way to start tuning the boost curve on a bigger turbo? I don't want to be one of the guys that starts at 26 psi and works his way DOWN to where he wants to be lol.

if im not mistaken you would have to zero out more than just the wgdc its the proportional deravitive and intragal gains also because each one helps with building boost and "errors" as the ecu calls it ive done some reasearch on the gains and ive fooled with them and got some pretty cool results but i dont have alot of time to test and test and test so i just went back to my normal stg 1 settings for those gains.. but id zero out all of those and let it run off wastegate pressure. and im pretty sure the computer will let you do that

[cobaltssoverbooster]

run a hose around the solenoid and turn the codes off maybe

[oldskool]

If I decide to do it this way, I'd rather do it in a way that might be compatible with the PCM, rather than trying to fool it.

[Ch1ck3n]

Run a good MBC.