Ok, finally had a reason to start from scratch on a tune. I'm going to try PSI based out!

Now, I'm not going to imply I know anything about how the coding/ROM works, but I did want to see if there was a possibility. So, bear with me. Currently, we have a Boost Adder ("Atmospheric Pressure") and a Boost Targets (in PSI). Is there a coding/magical way to have the current barometric pressure from the car's sensors populate this value instead of having a static value? This would provide us with complete flexibility for changes in altitude while maintaining the gauge pressure we desire.

Just a thought.

 

I also neglected to say thanks for porting this over.

Thanks!

 

There is a method for doing so on the X for logging purposes (essentially comparing baro at the MAF to the MAP value) however it may require alot of extra coding, instead of just changing the pointer for the error correction reference.

 

any updates ? i'm getting into this as well but lost touch since i;ve been away for a while bz with work. do i still keep the original BTEL tables or just simply replace them ?

 

BTEL are replaced by Target Boost tables..

you can leave them there, just dont play with them

 

heyyy . . . thx mate, left them in there. set for 26.1 psi but boost only went to 23-24 ish psi. will fine tune it and see what happens. messing around with it a little. just the new ones.

 

have you got TBEC turned on or off?

 

hmmm maybe . . . let me see on ma tuning lappy. where isit located ? same as where the old boost tables are ? gtg get ready for work soon. thx mate

 

I'm having a play with this aswell
so does Error Control need to be turned ON?
have it turned off to get the WGDC table sorted, then do you set it up like in a stock ROM??

 

With TBEC off this is just like load based boost control.

The *only* difference between load based and PSI based is error correction.

With TBEC off it's pure base WGDC.

- Bryan

 

Tis okay... i was referring to Reactive Solenoid error correction, which was zeroed out on my tune.
however, after putting some values into my TBEC in Direct Boost, i noticed that the Reactive tables had changed aswell (as i thought they would). All good! Should have done that before i posted a stupid question.

Incidentally, after adding the code to my xml i found my boost tables were already all set to 25psi across the board and addresses already changed. So i guess my trusty tuner used psi-based boost control when he was tuning


What sort of values are people using for correction? Mine are all 0s so i need to build that table

 

Any news on the 4bar setup?

 

Search more, its been figured out for a while now....I had mine setup, thanks to Tephra, in October.

 

Guys,
First I have to apologize for my newbness... I've been out of the evo tuning scene for well over a year now and am just getting back to 4B11T world with my Ralliart Sportback. I have dyno tuned around 100 evo's in my time so none of this is completely new to me... though I am a bit behind the times now.

I have been searching, reading, searching again, etc etc for a few days now and one thing keeps stumping me with regard to Direct Boost control:

What the Heck is "Atmospheric Boost" ?????

I understand the difference between psia and psig and how local atmospheric pressure affects the correlation between psia and psig. But I have never heard the term atmospheric boost and, it seems a bit of a contradiction to me. By definition atmospheric pressure is positive pressure in a psia scale but zero pressure on a gauge scale. Boost refers to positive gauge pressure. So Atmospheric boost just seems a contradiction of terms to me.

So, questions are:
1. What data do I store in this variable when using direct boost control? (I assume it is local atmospheric pressure?)
2. How is this variable used in the implementation? (Is is just used for logging so psia gets converted to psig, or is it an actual offset value or what?)

Again, sorry for the newb question.

 

Yes, you local atmospheric pressure, so if you are sea level it would be 14.7
Yes, it's used as the offset.