TD_D mod journey. From stock to the 'bastardmobile'

[Td_d]

Well, finally found the HKS EVC VI installation / setup manual (HKS really need to get it together and have manual for their own products on their website!).

I am sure that once I start digging into the settings I will find that the only thing that was done was the auto learning. The offset wasn't even set - it's off by 11% - and by the looks of it, this is a pretty sophisticated EBC - bit of a schlep to programme - but quite configurable.

http://dl.dropbox.com/u/3099895/22538022-HKS-EVC-6-Manual.pdf

 

[Td_d]

Ok, improving, and it seems that peak boost has also shifted back to mid 4000's. I figure if I also set the EVC properly, I'll get it cleaned up - but I'm maxing out the injectors, I've got to tone the boost down before something breaks...

 

[Td_d]

Here's how it's tracking against AFR - much closer, still some cleaning up to do - but it's been very cold today, and the injectors are maxing out - you can see it leaning out at the top [shudder]

 

[Td_d]

I think it's also time for a new MAP sensor - I think it's either maxed out, or very close to it...

 

[Td_d]

Holy - which five-o's have you tuned - only the 2000's? I'm getting tired of the bullshit delays from the shop locally, so I think I'm going to go ahead and just order directly from Jordan - I figure 1200's. Did you do these or similar (1000's or 1400's) so that I don't have to battle with latencies?

It's unbelievable how the cold weather pushes up the IDCs by over 30%!

 

[HolyCrapItsFast]

I've done the 1000cc and 1200cc sidefeeds. I just don't remember what the latency was for the 1200's though. they were different.

 

[HolyCrapItsFast]

AFR's are ramping up with RPM toward the end again... You tink this is due to IDC's. That's what I'm gathering.

Ok, improving, and it seems that peak boost has also shifted back to mid 4000's. I figure if I also set the EVC properly, I'll get it cleaned up - but I'm maxing out the injectors, I've got to tone the boost down before something breaks...

Here's how it's tracking against AFR - much closer, still some cleaning up to do - but it's been very cold today, and the injectors are maxing out - you can see it leaning out at the top [shudder]

 

[Td_d]

It's definitely IDC's, I'm not even gone to tell you how high they went! I actually have to let off the high boost map whilst it's this cold here - it's not safe...

 

[HolyCrapItsFast]

Okay... I figured that much. So when do the new ones go in do you think? It would be nice to open this thing up! you haven't even begun to utilize that turbo yet. Great choice BTW. I recently tuned one of these turbos and all I could say is impressive.:tup:

 

[Td_d]

Ok, well it's decided - the only injectors available locally are 875ccs, which frankly is pointless, I'll max those puppies out easily - so I'm going to go ahead and order 1200's from Jordan.

Here we go again...

 

[Td_d]

Definately something funky going on with the EVC - I think I might need to do a complete reset and run setup myself again. I read the manual, and dropped target boost down by .10 bar to see how things pan out - then realised that the peak held boost that the unit was showing was the basically the highest ever shown - in otherwords, if peak boost was lower, I would not know. So I reset the peak boost (i.e. zeroed it) and did a nice WOT run. Unit is showing 0.21 bar - WTF? Checking through the logs on the SD card however, boost is building up to where I suspect the MAP sensor is maxing out, to 1.27bar relative. WTF is going on...

 

[Td_d]

From the reading I'm doing, if you set any of the two boost maps (high or low) lower than 'base' pressure i.e. wastegate, the EVC is not going to set up properly. In my case (verifying this), on the Dom3 XTR internally gated, the actuator is set at 15PSI - i.e. 1.03bar. What's my low boost map? Target 1bar (although it was boosting higher since the offset wasn't set properly). I don't think the hardware is faulty - I think the set-up was faulty.

I'm going to reset it, and reprogram the targets and set the offsets properly this time and see if I get better boost curves.

 

[HolyCrapItsFast]

Definately something funky going on with the EVC - I think I might need to do a complete reset and run setup myself again. I read the manual, and dropped target boost down by .10 bar to see how things pan out - then realised that the peak held boost that the unit was showing was the basically the highest ever shown - in otherwords, if peak boost was lower, I would not know. So I reset the peak boost (i.e. zeroed it) and did a nice WOT run. Unit is showing 0.21 bar - WTF? Checking through the logs on the SD card however, boost is building up to where I suspect the MAP sensor is maxing out, to 1.27bar relative. WTF is going on...

You need one of these... http://www.buyimportperformance.com/Omni_Power_USA_Subaru_WRX_STI_Map_Sensor_p/map-sti-3br.htm

 

[Td_d]

^ Yup - I think I'll throw that in with the order for the injectors. I'm glad I'm learning all of this as quickly as I am - because everyday I am becoming increasingly pissed off with what I'm seeing on the tuning elements. I see why people work on their own cars now...

 

[Td_d]

I'm wondering why the stock MAP sensor is maxing out at 1.27bar relative (18.4PSI). In absolute terms that should equate to 2.3bar - I thought these sensors were good to 2.5bar?

Another question on my mind - I know that the EVC is controlling boost independently of the ECU boost control system - but would any of the variables in the boost control tables still impact on the tune (the reason I'm asking is that target absolute boost in these tables is 2.2bar - suspiciously close to what the sensor is maxing out at)?

 

[HolyCrapItsFast]

The ECU should have no impact at this point provided the only thing that is hooked up to your turbo is the EVC only. The stock EBC should not be connected to anything.

 

[Td_d]

Ok, so my reasoning was right again - something was up with the EVC. Did a cursory look at the pipes this morning, could not see anything obviously loose as such, but I had a niggling feeling it was the two filters on the pipes. Had the good fortune of being out in the same part of town as the mechanic, so swung past the shop - to make sure, he did a pressure test - and hey presto - one of the filters had split loose (they can be opened for cleaning). Hisss...... good thing is he also discovered a boost leak in the connector from the intercooler to throttle body, so sorted that out as quickly. Worm clamps suck...

Everything sorted out, reading boost properly again - I can feel boost is building much quicker now too. Could obviously not push it because.... I have to relook the MAF scale again :tard:

Such a difference dealing with the mechanic and the 'tuner' - he does his work thoroughly, checks that everything else is ok whilst he's at it, and often will not charge me. Disorganised - but excellent on the mechanical work. What revved me up was that the tuner is now pushing him to pay for the 'tune' that he did on my car (defending how crap it was because he was 'rushed'... seriously?). I told the mechanic that I've got all the data logs that prove how shit the tune was, and he can go stuff himself if he thinks it's worth money. I means, seriously? I would at least have the dignity (and self pride in my work) to not even let the car go out of the shop like that... I wonder how many cars he's going to have blow up with the weather going cold now. Some solace is that his investors/business partners are pulling out of the business. I wonder why. [/rant]

Anyways... now I can at least set up the EVC properly, and tone the boost down a little till the injectors arrive. 3.5 bar MAP sensor ordered, injectors about to be.

 

[HolyCrapItsFast]

And there is always us and this journal to corroborate your side of the story. :tup:

I took one quick look at your original tune and thought to myself "WTF was this guy thinking!!!"

 

[Td_d]

Yup... I'm not up for the cash - but I'm galled at the cheek of it, unreal.

Injectors en-route! Yeeha, can't wait.

 

[Td_d]

Well, making some progress - EVC working well now - I'm building full boost by early 4000's in 3rd gear, and earlier (3900-4000) in 4th. I've toned the boost down to 1.45bar now from 1.55 (been playing between 1.35 and 1.45) - found it's a happy middle ground between keeping IDC's at reasonable levels, and power decent. I wonder how long this problem with the EVC was happening... and surprise, surprise, after RTFM I actually managed to get target boost and peak boost held perfectly matching on the EVC. It was real brain surgery. What a twat...

I've also cleaned up the fueling table nicely now, so that it drops rich earlier - Airboy's log file interpolation spreadsheet really makes it easier to see exactly how your WOT curve progresses. I've also dropped timing a little right at the top, as I got knock occasionally - all gone now.

I have a feeling that the meth is kicking in too late - I think I need to tweak the setting (threshold and gain) - it's an IDC based system (uses an HFS 3 pump, but local controller) - like everything else, I suspect it's not set ideally. If I WOT in 2nd gear (in other words, moderate loads), all the way through to 6000's rpms, it looks like it's not spraying - only when I start getting real load in 3rd and 4th, at the top, is it throwing spray at it. What's the rule of thumb in terms of where to kick the spray in on an IDC based system?