OK i am using tephra modified rom 96260009 on my car (its a JDM EVO8 MR, so it has the 2 boost solenoids). I was getting alot of knock with the poor quality gas we have here and high temperature (average 33 degrees celsius), so i tried reducing timing which helped to an extent, however I wasnt happy with how low I had to reduce timing at max load (setting it at abt 1 degree), so I turned down the boost by making the 2nd solenoid 0% baseline duty cycle.

I will now log and reset the timing values to a decent level and try to turn up boost back to about 19-20 psi steady...

before i was getting boost spike to 23psi in 3rd gear under certain circumstances...this was with a totally stock car and stock boost control settings! this overboost may be due to the slow reaction time of the stock system.....

what do you think of zeroing out the upward boost correction tables..meaning that when the car is under target load it does not add duty......however when it is above the target load it will pull duty...may make for a smoother boost curve and hence smoother load curve and therefore smoother acceleration as timing would jump much less.....

 

Yes, one way to limit corrections is to zero out right side of the upper half of the boost error correction table. The better way to do it is to zero out the max upward correction table, but I don't know if you have access to that table. Another thing that helps tremendously is to set the correction interval to a value of "1", but again, I don't know if you have access to those tables.

 

No i don't have access to the max upwards or max downwards correction tables...
What correction interval to set to a value of "1"?
Also, which section of the TBEC table should I set to 0 for no upwards correction (please refer to attached table)?

 

Set all the positive values in the right column of the table to zero. That will prevent the ECU from raising the WGDC above the baseline value.

I don't think you have access to the WGDC correction interval table.

 

The only problem with setting all the positive values to zero is that if the ECU does any downward error correction it will never pull it back up.

If you can find the max upward table the best bet is to set that to 0 or 1 like mrfred suggested.

I set it to 0. That way it will never add more than your base WGDC but will still bring the WGDC back up after downwards correction happens.

 

so does anyone have those max upward tables defined for 96260009?

 

sorry to say but ur torque is pretty low for ur mods lol thats church's for u though

 

Hey mrfred, the stock boost settings for 96260009 and 96260007 max out the duty on solenoid 1 (100%) and use up to 50% on solenoid 2 (please refer to attachment).....now this is assuming that these tables were defined correctly......

In this case how would the ecu add duty cycle to increase boost when the car underboosts since solenoid is already at 100% and increasing to more than 100% has no effect?

 

For the factory solenoid, the single solenoid Evo's are the same, 7/8/9 and the double solenoid 10. The first solenoid is at 100% from the factory.

If you replace the factory solenoid with a 3port, or even upgrade the pill in the line of the factory solenoid, you will get much more boost for the same duty cycle.

 

Yes, solenoid 1 is 100% from the factory, and solenoid 2 is set at whatever duty to give additional boost. But isnt the 2nd solenoid not under the ecu's adjustment control...meaning that the ecu will not adjust duty cycle on the 2nd solenoid to correct for errors?

In this case how does the ecu adjust for underboosting with the factory 1st sonlenoid already set to 100%?

 

It doesn't. The mitsu engineers sized the factory pill very close to what they wanted target boost to be.

 

So what you are saying is that it does not add duty cycle what the car is under the target load?

 

If it's at 100% WGDC then no it cannot.

 

Hmmm....so in effect setting solenoid 1 @ 100% duty and using solenoid #2 for additional boost means that you have no underboost protection, it will only pull duty cycle for an overboost condition...good.

Besides this, what are some of the disadvantages of running solenoid 1 @ 100% duty cycle?

 

Don't you solenoid #2 (the passive one) at 100% all the time?