xbox4414

iTrader: (2)

So I have been working with Gunzo on making a custom map, I'm running 26 peak PSI, but it looks like the boost error correction is kicking in and making the boost dip, pick up, dip again and pick up. I need some help working this out of the tune. I want to run 26psi and then hold as steady as possible. Here is a screen shot of my log:



I know I have some knock and some AFR is too lean in certain areas but before tuning those out I need to get the boost curve fixed and good. I know the car is really under powered right now with it doing this.

I don't have anywhere to upload the ROM or the datalog but if anyone would like to help me out and look them over that would be great and I can email them.

-Ray

tephra

iTrader: (6)

Ray,

Are you running stock BCS setup?

If so you need to log both active and passive wgdc.

Cheers
D.

xbox4414

iTrader: (2)

Yes it is on the stock boost control. I hadn't logged the WGDC's yet...ugh. I'll probably be logging on my way to work tomorrow. Got a nice on ramp I can do a pull on. Blah. Wish I had thought about logging the WGSC's.

-Ray

tephra

iTrader: (6)

You should always tune on flat ground, ramps (by definition) are up hill, so you will hit different loads and stuff

Log both DC's and you should be able to see the TBEC's impact!

xbox4414

iTrader: (2)

Haha, yes ramp wasn't a good term to use then. It's a flat section that merges onto the freeway.

So what should I be looking for when logging WGDC's?

LOL I get tuning everything on the X but the boost, got a how to? Haha.

tephra

iTrader: (6)

onya

Well you can "marry" up the wgdc curve from the log with the curve from the ROM...

if it deviates then you know TBEC is jumping in.

What I do is zero-out TBEC until I get the boost/load curve I want, then turn TBEC back on (albeit with much SMALLER changes)...

Obviously if you ZERO out TBEC make sure your not over boosting (since TBEC can't save you :P)

Cheers
D.

xbox4414

iTrader: (2)

LOL you just lost me. What you mean marry the curves? I ask because there would be the active and passive curve right and then the ROM curves? IDK....LOL, I'm kinda lost. What curve/curves from the ROM?

Could it be BTEL issues? I don't know where to start, haha. Because Gunzo said the following when playing with my ROM last night:

But it still has the issues...

tephra

iTrader: (6)

marry = match the curves.

You have a twin BCS, 1 active, 1 passive

In the ECU there are 2 sets of maps, 1 for active, 1 for passive.

Match the curve from the ROM to the curve that is LOGGED during the pull...

You don't really need to worry about the passive one - since its unaffected by TBEC...

xbox4414

iTrader: (2)

Okay so when you say the curve from the ROM do you mean viewing the 3D graph?

Because in past pulls I actually logged the Active WGDC. The WGDC is the brown plot at the top.

GST Motorsports

iTrader: (8)

Error correction kicking in, you need to up match your BDEL(+offset) with your actual logged load.

xbox4414

iTrader: (2)

I thought so. I'm starting to get boost tuning in the X. LOL.

But also load is going down when the boost dips. So should I try to guess what the load SHOULD be and adjust the BDEL + offset to the guessed load?

GST Motorsports

iTrader: (8)

Tune your boost curve with error correction off to take out the guess work, once you get the curve you want, take the logged load and fill in the BDEL (+offset) to match, turn error correction back on, fine tune from there...

xbox4414

iTrader: (2)

Awesome, actually doing it hands on with graphs like this make it so much easier to "figure out" how to tune boost.

Also note how the boost tappers a lot. That's not BDEL controlled I guess. How is that fixed? I'm shooting for 26psi, tapering to 21-20PSI...not the 15-17PSI it shows.

GST Motorsports

iTrader: (8)

Since it looks like you are still on the stock system, its all in the secondary solenoid... but it won't get you 20 out the top.

xbox4414

iTrader: (2)

What is the max it will do? Maybe I could pick up your boost pill too? LOL.

-Ray