Here are my settings just tested. Gauge showed to hold to 21psi.



I did have another look at the WGDC in the latest Evoscan. At idle for about 20 sec it was at 0%, then it shot to 100% on the first log. 2nd log is a 3rd gear pull with GM settings. Boost did hit pretty hard with the lower settings vs before with the higher settings.

 

I Set mine like that too, Based on evokid's boost write up.

 

You shouldnt have 159 all the way down in the BDEL. It should look more like bryans post which you quoted above.

 

Even with error correction disabled, I sometimes see overshoot when stabbing the throttle at around 3800-5000 rpm. It seems to be the range of highest turbo efficiency/spool up. I've never seen 4 psi overshoot though. Do you have all the hoses zip-tied down?

 

That is just gauge measurement. Could be less.

 

One thing I've noticed is that lean spool promotes overshoot. I see much less overshoot with lean spool disabled.

 

you moved the solenoid activate/deactivate settings..I have never messed with this..can you explain what the changes from the stock settings have done

Milburn

 

Thats something else i need to look into....hmm change BDEL table up top and then disable lean spool and tweak the fuel tables again....so many things so little time

Milburn

 

Actually I never changed them. They are like that from factory on the 03-04. I did notice that on a stock 05 rom I looked at, the wastegate solenoid activation settings are about the same as 03-04 for the reactivate portion, but the deactivate portions are both above 7000 rpm rather than one stuck at 3250.

 

I've got to give mchuang some support on this one. What he's seeing is exactly what I'm seeing on my '03 VIII (ROM 94170008). In summary, when the car is cold WGDC is 0% until at some point it rises to 100%. Under WOT the ECU initially sets the WGDC based on the MWGDC table(s) but then starts to correct even though 2-byte load is above BDEL + offset. The way I "fixed" it was to set the positive values to zero in the TBEC table then make my adjustments to get boost where I wanted it.

For reference here is a chart: https://www.evolutionm.net/forums/sh...8&postcount=23

I've since refined the desired load and WGDC to get a pretty flat 23psi from 3500 to 5500 RPM. My 2-byte load is also reasonably flat at ~260 from 3500 to 5000 RPM, but after that is rises to about 270 before it starts to fall off. Even when the 2-byte load is +10 over BDEL + offset the ECU shows no sign of reducing WGDC. It looks like as far as the ECU is concerned WGDC should be 100% all the time.

 

And 2nd that on the activate/deactivate settings. I wonder if the "Deactivate On" at 3250 means the ECU doesn't make any adjustments after 3250 RPM? I don't mean doesn't add to the MWGDC, I mean it doesn't alter whatever adjustment it has already made. Hmmm... I may need to try changing that setting and see what happens.

 

Well I figured out why the WGDC is at 0 for about 30 sec. I logged the car on a cold startup and found that when you start the car there is nothing in the vacuum lines yet, then as the car idles it builds vaccuum and then stabilizes. I even heard the solenoid click right when evoscan went from 0% to 100%. To prove this, I turned off the car for 1 minute and then turned it back on and logged with evoscan and it did not show 0% this time, it showed 100% WGDC because the vaccuum lines were not empty like they are when you let the car sit long enough.

AS far as the WG activation rpm
The "Deactivate On" an 05 rom i looked at was like 7200 or something like that, so I cant figure out why it would be 3200 on an 03-04, since the only difference is the turbo hotside.

 

The logged WGDC is at 100% while cruising and then once you start to boost it starts to drop and correlate to what settings you have in the WGDC tables, but they are slightly off.

 

Is it possible to use boost source from the manifold?
i don't have nipple from the turbo for the boost source(just got evo9 with buschur conversion kit which does not have nipple for the boost source).

thanks for the help.

 

That question has been covered many times in other topics. Many people tap into teh signal line for the BOV. Personally I welded a nipple on my Bushur LICP and we tapped and installed a hose barb on my friends Buschur LICP. That is what I suggest you do as it will not take away pressure from the BOV.

It is pretty simple just get a fitting with threads on one side and a hose bard on the other. Drill and tap, thread it in, and then JB weld ontop for added security.