cij911, I believe if you zero out the boost error map from 0 to -20 that means you don't have any underboost correction which it seems like is happening with you going 20 and then dropping to 15 and staying there.

 

Bryan -- No boost leaks (unfortunately)...I would also think if one of the lines (from WGA or Turbo) had a hole that the system would over boost. We swapped the WGA with a brand new factory 9 WGA and am still having the same boost results. (I may have a blown turbo or a clogged catalytic converter...)

I am going to hook up an MBC over the weekend and see what results that yields....Thanks

 

UPDATE: Turns out my GM BCS was defective ...Should be an easy fix once the new one arrives....MBCs sure are easy .....

 

Would you share how you found out it was defective? Then maybe others can know if they have defective ones too.

 

Several ways: (1) Adjusting WGA and target load did absolutely nothing with boost -- i just ran basically WG boost (2) installed MBC and was able to run fine...(3) I have not tested the unit itself but will later this week....(4) I got a bad WGA code...I believe it was TP224...

 

did a log tonight and my boost did a wierd dip right around 4k. this was on a third gear WOT pull starting at about 2700rpm. I spiked at 25.6 psi then it just dipped to about 22 and then tapered off to about 20. I usually can hit around 26-27.5 psi with these same settings and it will just gradually taper to 20 to redline. Could it just be my correction because I hit over 330 load and my BDEL only goes to about 310 here is a look at the graph and my settings.



thanks,
ed

 

Yup that is your correction doing what it's supposed to be doing.

 

That is one of the reasons i am going to be running a MBC on top of the GM 3port. It will prevent spiking like that.

 

Actually I'm not overshooting my boost, my load just seems to be spiking I actually usually hit between 26-27+ psi doing a third gear pull like this one.
Should I adjust my offset and BDEL to reflect my third gear pulls? how will this effect when I do a 1st gear and up pull? When I do a 1st-3rd gear pull I usually only see about a max of 305 and lower load and it follows my existing BDEL+offset.
thanks,
ed

 

I am targeting a peak load of more like 250 - 260...If you're running 93, you can hit more like 24 / 25 psi with target load in the 270 - 280 range...

 

Try less error correction at -10/-8

 

Does anyone have logs of the stock turbo holding more than 20psi at 7k using this?

 

CORRECTION: I tried the AEM again, with just 1 resistor and it works! Yipee. This looks to be the same as the mac solenoid that is listed int he HFS-5 install. The AEM is mfg'd by MAC.. rated at 120psi.. etc etc. Glad I finally got it to work with ECU control.

 

Well I am having a hell of a time getting the car to hold / hit boost like my two previous setups (MBC and modified stock BCS). My target peak load is ~159.4 + 105 @ 3000 rpm, tapering to 120 + 105 @ 7000 RPM and for some reason I seem to be ~ 15 - 18 psi in third / fourth gear and closer to 20psi in 6th. My MWGDC were 100 up to 3000 rpm and then 75 to 7000 rpm.

Shouldn't a load of ~265 be like 21psi @ 3000 rpm (the car is acting like it is trying to be at 15psi)?? Any ideas on what could be going on with my setup? (I did have different configurations for tables #1 and #3.) Thanks

 

You should try psi based boost control. Load based boost control can be off, cuz sometimes you need 24psi to make 260 and sometime you only need 22psi to get to 260.