What do you have your WGDC Correction Interval set at?

Why do you have 0 in the -20% cell?

 

I thought we were suppose to have 0 there also. I have my top half above 0% zeroed out. According to the wiki and other searches i have seen. My boost has been doing pretty good though since your advice earlier in this post. Thanks.

I guess that tbec chart on the left side is actually load and if it is -20 load under target load which mine is 240 right now, then it will correct the wgdc% on the right side of chart is that correct. So for example if i hit 220 instead of my 240 then it will look at the tbec for -20 and what every % i have on the right will be added to my wgdc is that right?

 

I foiund that having my correction table set very light (between 2.5-0.5) in both directions gave me the smoothest repeatable curve without overcorrecting. I also have my base WGDC BELOW my target load to help prevent overshooting and I'll let the ECU add a little correction here and there to bump up the curve if needed. I was told by a bunch of people that keeping the lower negative cells at zero helped prevent the ECU from trying to correct during "spoolup" which would cause overshoot.

 

I would use the max WGDC Upward correction vs TPS table for that. I found the results are much better and you don't run into the non-correcting -20 issues you are seeing.

 

Oh yeah I forgot about that (new to ECU boost control). For now I added +0.5 correction in the bottom bottm 3 negative values. I forgot to mention that I have the correction interval set to "1" so it corrects more often with smaller jumps. I found this to work wonderfully in my setup, I'll look into the TPS table next.

 

I asked about this when mrfred originally found the tables. From what i remember the ECU is never limited to negative correction only upward correction. So if you have 10 in that table for max correction it can still remove over 10% WGDC. Mrfred can confirm but that should be accurate.

 

yes only upward ABOVE base WGDC. If you zero out the table it will still pull as much WGDC % as you put in your TBEC table.

It will also add as much WGDC back in (if you have it in the TBEC table) up to base WGDC, never beyond (if that Max upward correction vs TPS is zeroed out)

I've found great success with zeroing out the upward correction table and having some extreme upward correction in the TBEC table, that way if boost ever gets pulled it will add it back to base WGDC as quickly as possible, as long as load is at or under target.

 

So are we happy that there isn't a BUG in 5.10 94170015?

Can we put a update in the first post?

 

Well, I have still heard numerous people say that when they switched from the regular maps tot he alt maps it didn't switch over to the alt map boost tables. I also encountered this a while back when I first started messing with the boost control. I want to try and make it happen intentionally first.

 

There is a single value table for the max downward correction. I think the max downward correction is 72%. I never posted it because I figured that most people would never have an interest in adjusting it. I'll probably include it in the next ECUFlash definition update.

 

I would actually like the ability to adjust this value. I can typically get boost within +- 2psi using BWGDC and would like to only allow the ECU to have a small range of adjustments so that WGDC is never more than 15% from BWGDC.

 

What do you put in the 100% TPS column for upward correction. The issue with adding correction during spool can easily be fixed by zeroing out correction at TPS < 75% or so but you will need to allow at least some upward correction at TPS > 75%. You would still have the adding correction during spool issue if you were full throttle.

 

Have we found this TPS vs. Load table for the evo VIII's yet? 94170015 to be exact lol. Heading up to the track guys, wish me luck!

 

One other nice feature of that table is you can enter negative values to force lower than 0 correction at a certain TPS region.

That would be very nice! This would surely help with getting stuck under the correction area....

... and so would this! I think I get what you are saying, but can you post an example set of tables to help me visualize if you get a chance?

Also, in regards to being on topic . Jamie, I'm not sure how long you are waiting between flashes when you are running into your issue, but on MBC/static duty boost control I would always see very large spikes the first time I came close to full boost when outside temps were cooler. It didn't matter how long I had warmed up the car for or how many times I had hit partial boost. Not saying that is your problem... but maybe you need to push full boost for a second before you start logging.

 

I notice I get this on my first pull of the day no matter whether I have reflashed the car before the pull or not. Thats why I always do 2-3 pulls on my tune before changing anything. If I could figure out why I always get this...I'd be a happy man but it seems to be a common thing for a large percentage of us.