Hi guys,

i have a JDM evo 8 with a tactrix 3 port. I have the donate ware 96260709 from Tephra and have noticed a problem. I have given the car full throttle when the coolant is less than 80 degrees on a couple of occasions without realizing it and have noticed that when doing so the car has no boost control at all. the boost actually jumps up to almost 2 bar. Ive searched and found no additional tables relating to this problem.

can anyone help?

 

you dont have "WGDC Coolant Temp #1" and "WGDC Coolant Temp #2 (main)" tables in the Global Boost Control Section?

If not I suppose you just should wait before flooring it Im sure your rods will fix the situation for you if you dont.

 

Regardless of the coolant temp, if your boost control is setup properly, you shouldn't be overboosting so much.

-Jamie

 

Here's some stuff that might be useful:

<table name="Max WGDC vs Coolant Temp" address="55d0">
<table name="Coolant Temp" address="5d5c"/>
</table>

<table name="Max WGDC Cold Engine \ CEL" category="Turbo" address="2200" type="1D" level="1" scaling="WGDuty16"/>

And specifically with the Cold Engine bit of the xml, read the top post on the second page in the link:
https://www.evolutionm.net/forums/ec...20008-a-2.html

I'm on the same rom and am going to one day finally install my GM 3 port, so I'm keen to hear your results if you try it.

Charlie - is the MAX WGDC vs Coolant Temp the same as one of those tables that you've just mentioned?

 

I dont think so. I dont see the ones you posted in my 9417 rom. The ones I posted should work as an on/off switch. BCS control off (which should be WG pressure) until the desired coolant temp in the map. FWIW, Ive never messed with them tho. The OP just shouldnt be experiencing this in the 1st place. If the coolant isnt up to temp, neither is the oil.

 

Does your 969 rom have the WGDC vs Coolant temp table? If so, use that one. The 9417 rom doesn't have that one, only the on/off tables.

-Jamie

 

Oh, I should have said that the xml I posted above is for 96260009.

Having said that, the values in the table by default are 0 WGDC until it is getting close to operating temperatures, so what sort of values might be helpful (although it sounds like there is another underlying problem here)?

 

thanks HD ill give it ago

 

Honestly, you have a problem other than this table if you are boosting more than it does when it's fully warm. What do you have your boost tuned to anyways? Maybe post a screenshot of your. Post control tables and we can see if anything seems wrong. Raising the WGDC was raising your boost right? I have seen people hookup their vacuum lines wrong on the boost solenoids so lower WGDC would raise the boost. That would explain why it's overboosting when the WGDC vs Coolant Temp table is set to 0.

-Jamie

 

My solenoid is hooked up correctly. When I increase the WGDC it increases boost pressure.

It should be holding 22-23psi

I logged this a while ago and when it went mental the WGDC was 95%??

I cant see the wgdc vs coolant temp table, the addresses HD posted up dont seem to work. or my xml is whack lol

 

Can you post screenshots of your settings?

 

So I looked at your settings and I think your missing the 'MAX Total UPWARD WGDC Correction' table. Ask Tephra if he has the table address for that. It's kind of important

I think your overboosting because you have a BDEL target of 250 load up until 5k RPM. During spoolup, I bet its adding Boost error correction.



Can you do a pull and log:

RPM
Load 1byte
Wastegate Duty Cycle
Boost Error Correction
Load Error



-Jamie

 

You may want to get the address' and appropriate settings for these tables too since you are doing ECU boost by LOAD.


"Variable for Boost Control"

"Load Error RAM Address"

"Load Error RAM Address in Load Error Table"

"MUT8A"

"MUT8B"

 

This one?

"Max Total Upward WGDC Correction vs TPS"

I gave nocabiwiksmx some better xmls to use, and it has that in it.

I always wondered if there was a way to log the load equivalent of those variables used for PSI based boost control. While the PSI-based values are available for 96260009 on MrFred's thread, I don't think the load-based values are listed anywhere. I did stumble across the values for 96530005 though, I think.

Oh, and I did find that the scalings in his WGDC and BDEL tables all had FFFF's in them, so I'm sure that wouldn't have helped.

 

edit, that is the right graph in the pic but thats not a "vs TPS' table.

Can you post up the XML code for the table you displayed for me?