Anyone had a play with ECUPLOT by nyet - nefmoto

[Stuart B]

It takes in Log files and creates pretty charts, not sure about the accuracy of the "money shot" default chart

http://my-worst-car.co.uk/ecuLogs/RunAfterTimingUpdate.csv​

​

if there are any experts here is there too much timing advance causing ****** > 5500? the IAT are only 18 degrees, Lamfa/AFR 0.92 / 13.5 and EGT 800 when it gets what I assume is "knock" it is quite a conservative load - peaking at 18PSI instead of 21PSI and getting there smoothly peaking at 5500 - so there is room for some more assuming the engine is healthy.​

 

[IPG]

I love ecuXPlot

.92 lambda... quite lean there sir.

 

[IPG]

Although the lambda is not shown on your screenshot

 

[Stuart B]

I will check my lamfa map against the logs. This is only a stage one map. As only a B5 tip and air filter.

 

[IPG]

I will check my lamfa map against the logs. This is only a stage one map. As only a B5 tip and air filter.

Yeah still a good idea you enrich when upping boost

 

[Stuart B]

well the logs are matching my map. it is enriched compared to a stock fueling and also a generic stage 1 map and the TTQS BFV map. and I know it is enriched as my average MPG is now 27MPG instead of 32MPG

because of the knock voltage in the log, I have returned the timing back to stock but just tweaked the load a little more. which is pretty low compared to the boost PSI and MAF readings, maybe this turbo is super healthy - or really unhealthy?

does anyone know why a BFV Map has an increase in engine load during continuous knock? it seems weird to me - but I wonder whether they pull the timing and are trying to fill the gap in power by ramping up the load? where-as amateurs like me just let the power drop to look after the engine? or has someone got the values in the wrong columns?

 

[Stuart B]

I am wondering whether the knock voltage is because I still have stock spark plugs rather than BKR7E. I have some ready to put in.

 

[antwan64og]

There shouldn’t be continuous knock, a few counts at high rpm I think is acceptable. I don’t even count that as knock since the since the sensors can pick up valvetrain noise at high rpm, no way round that.

Is this with premium fuel?

 

[Stuart B]

I don't think having a small number in the knock voltage is actually knocking. It adjusts the target timing though, so the 24 degrees btdc in the map gets changed to 8.
I am only a real beginner at this and should have carried on collecting key rings instead

I'm not gonna change anything else now until plugs and FMIC then a little more fuel.

 

[badger5]

enrich it ***.... timing intervention will reduce when you fuel/cool the cylinders

 

[Alex C]

I don't think having a small number in the knock voltage is actually knocking. It adjusts the target timing though, so the 24 degrees btdc in the map gets changed to 8.

so knock detection is pulling timing by 16°?

 

[IPG]

enrich it ***.... timing intervention will reduce when you fuel/cool the cylinders

Do this one Stuart....

 

[badger5]

so knock detection is pulling timing by 16°?

only 12 allowed as max in std map, so somethings wrong in the data or interpretation thereof. unlikely 16 pulled

 

[Stuart B]

Thanks guys
It will be my data interpretation. I will upload a more generous fueling for discussion

 

[Stuart B]

okay so really excited about the extra enrichment - as this is only supposed to be a stage 1 map until I have the other hardware in place I am going to wind the load back a touch and aim for more like 17 PSI at peek boost (otherwise I dont really see the difference between a stage 2 and stage 1 map?)

with my previous fueling on the timing this is the knock voltage line @ 6700RPM

CYL 1:-3, CYL 2:-5.25, CYL 3:-6, CYL 4:-9 LAMFA was 0.89 desired / 0.87 actual (maybe borderline protection?) and timing reduced from 24 BTDC on the map to 16.5 BTDC actual - EGT almost maxed out @ 889 - so hopefully the extra fuel should help this out.

As the load appears to be totally different on this car compared to my old S3 - I dont see the point in posting it as it will just confuse everyone - maybe after the FMIC is fitted the LOAD to PSI to MAF readings will be more in tune with expected calculations.

 

[Stuart B]

oh dear - it felt like it was going so well - I am lucky I didn't break a rod I reckon.

http://my-worst-car.co.uk/ecuLogs/runoneloadtoolow23_26secs.csv

I think the load line is too low now to go with the rest of the map? - the load sort of overtook the maximum load then hardly any power "like it had a puncture" then a sudden increase? you can see it in the logger between 23-26 seconds - this is a lot worse than the previous map with some timing but with no fuel and more engine load.

normal driving about town feels great very responsive - I wonder if it ran out of fuel for a few seconds?

 

[Stuart B]

okay so this is what the chart looks like you can see the actual boost drops totally off @4500? (like a leak) but a leak wouldn't suddenly recover from 9psi back to 18psi @5500 - would it? it's like an N75 failure?

 

[badger5]

intervention more like

 

[Stuart B]

Thanks Bill, Hmmm I was wondering, so it essentially dropped to the knock load map then jumped back onto the normal map.

So I will roll it all back to stock timing, BFV load and the more generous fueling, and if that is stable revisit the timing, my problem is lack of knowledge so I have been using the timing from my old S3.

Thanks for your advice as usual

 

[IPG]

remove all that calc HP stuff - makes it confusing! LOL

put in knock, EGT's, intake airs etc into excel table
lock the top line so when you scroll to where you're having the issue we can still see what the columns are referring to

 

[Stuart B]

spreadsheet updated - you can see the boost just plummets at 23 seconds then smacks back in again at 26secs at the same time the engine load goes from 130 to 190 in 0.5 seconds.

http://my-worst-car.co.uk/ecuLogs/runoneloadtoolow23_26secs.csv

what seems to be happening is the engine load doesn't seem to be controllable by adjusting LDRXN I only had 173 in that column from 3500-5500 but the actual load waivered above then dropped back, I was trying to be conservative with this as with my S3 I put in building up to 210 and got 225 MAF readings, here I am putting in low(ish) numbers and the MAF readings are going over 200g/s up to 210g/s at only 175 load. it's as if the turbo is delivering more boost than expected? also I have been getting 18/19psi from load figures according to s4wiki should only be 14/15psi. ( I wonder if the previous owner replaced the turbo with an aftermarket one)?

I will try another run with stock timing and BFV LOADs that should in all honesty only be 14psi - but with an 177 and 185 in there I reckon that will be 20psi @5000


take this snippet from a previous run with stock timing and low load map.

I set a max charge pressure to 166 but the car was at 181 and about 18psi and 207g/s MAF that's about 260BHP but I only requested 166 LOAD?

I hope someone hasn't put a "resistor" somewhere that is mucking around with signals?

 

[Rainbird]

I wonder if the previous owner replaced the turbo with an aftermarket one?
I hope someone hasn't put a "resistor" somewhere that is mucking around with signals?

I can't claim to know enough to advise on the mapping side of things but, from experience, it's always worth knowing exactly what's going on with your hardware setup before trying to push things further and before playing with software.

If you're having any doubts/thoughts like that, even if they're only just a back-of-the-mind type thing, you'd do well to give everything a good look over. Even if it just confirms what you thought originally, at least then you're working from a known point and can rule out niggling thoughts like that.

 

[Stuart B]

I hear you brother I have had the car for 5 months now and done about 4000 miles - it's just "odd" in its behaviour, the car should follow a pattern and usually with age you wouldn't expect it to make too much power for the request.

I wonder whether the actuator is weird?

 

[badger5]

if you raise request you will find on initial low rpm onset of spool its going to overshoot.. Even std car map will, but not by as much.
whilst you have other limit boundary maps as std the interventions will be kicking in, which makes diagnosis tricky. Seeing boost overshoot however is easily fixable if its the onset which is "tripping" it up.

 

[Stuart B]

okay so a 3rd gear pull today was "guided" by not flooring it - as I had a period in 5th gear on the way home before getting to the test straight where I lost power then it picked up (so the issue is still there with stock timing and a low load map). on my run where I gradually accelerated instead of just planting I didn't get an issue. I wonder if this might be causing my problem? could it be pulling on the foam hence the issue only under certain circumstances, can the air intake be able to restrict the boost pressure?

the run plot (obviously ignore the power figures it's the fact the lines are following a curve which is important)

the run file trimmed
http://my-worst-car.co.uk/ecuLogs/stocktimingbfvload2.csv

raw
http://my-worst-car.co.uk/ecuLogs/stocktimingbfvload.csv​

 

[A Banging Donk]

The load is all over the place. To be honest, I think you should go back to the stock bin and start again.

Don't start playing with timing until you have your fueling, load and knock sorted.

Give us a full throttle run of your stock file to rule out potential H/W issues.

 

[Stuart B]

So before I go back to stock BAM map, I compared my original TT map (STOCK) with a downloaded BAM stock map, from the BAM XDF items - I found a difference, not sure of the impact. but the TT Stock Map has the same setting as my previous S3 Map? is this potentially because the downloaded stock BAM map came from another country so needed a different parameter due to fuel quality? anyone know what this parameter is for?

 

[badger5]

thats just your fuel scaler tho.... not load

 

[Stuart B]

yeah the load levels are the same, I was just trying to make sure my starting point of a map hadn't already been changed in case related to the weirdness.

will do a log from this stock position to see if it's all over the place or stable.

 

[Stuart B]

totally stock map - with B5 TIP and Cosworth S2000 air filter

trimmed files
http://my-worst-car.co.uk/ecuLogs/stockmaprun1.csv
http://my-worst-car.co.uk/ecuLogs/stockmaprun2.csv

raw files
http://my-worst-car.co.uk/ecuLogs/stockmaprun1trimmed.csv
http://my-worst-car.co.uk/ecuLogs/stockmaprun2trimmed.csv

So even with a stock map I am getting 193g/s MAF and 15PSI - no hiccups in the two runs though, just a bit flat compared to mapped.

 

[A Banging Donk]

Looks OK from here, notice how you have no room for timing advance up top.



Now you can enrich to ~0.85 (12.5) gradually across the rev range, continuing the stock curve. Mine looks like this



This should take care of the timing pull at 5000+. Take more logs, check the injector duty cycle and then we can start increasing LDRXN

 

[Stuart B]

Maybe this BAM is just a bit quirky, putting our more power than expected.

I was going to put my previous fueling map back. Is it too much?

 

[badger5]

fueling nice for controller low egt's

 

[A Banging Donk]

Maybe this BAM is just a bit quirky, putting our more power than expected.

I was going to put my previous fueling map back. Is it too much?

Your previous LAMFA is fine for the 100% row, I think changing the values in other rows is a bit useless.

MAF g/s is higher than you'd expect, my only guess is that this is due to the intake mods flowing well? Doesn't really matter, just squeeze what you can out of it without maxing injectors or timing pull and you're golden

 

[Stuart B]

I know we are not really supposed to talk about mapping in too much detail on ASN, but I do appreciate the invaluable experience and advice from you guys. below is the fuelling grid I have patched, I will take it for a spin tomorrow to see if the knock voltage is reduced under higher revs. sometimes it is sensible to go back to basics and make baby step changes (I am still awaiting to fit my 3in DP and FMIC - so please keep in mind essentially I am only going for a stage 1+) rather than pushing the limits.

in all honesty as long as I have the confidence to put my foot down to overtake a van on an A road without fear of intervention cutting in I will be happy. I did read a comment from WAK on the tt forum where some boost leaks are only prevalent at 1.5 bar, so I suppose there is still the potential for that?! once stuff settles at home and my daughters wedding is done and dusted (that's not "over" but "they are married and we are all home again") I will revisit the hardware and remove the 249 simplify the PCV and fit the FMIC, I am still in two minds over whether I want to change the DP myself due to the steering rack bolts quite "snappable" and it needs aligning afterwards too... so...?

I am a little annoyed that when intervention cuts in, it doesn't have some form of indicator / event history that it switched maps for a moment, I still wonder whether the setup struggles over say 16psi! maybe it has instability - I have never adjusted/replaced an actuator before but wonder whether this is a potential issue, and the turbo is trying to create 18 psi but the penny has been forced open momentarily. I think I recall reading a comment from Tuffty a couple of years ago about the throttle plate being blown shut, or the boost pressure and mixture being too much for the spark plugs?

 

[Stuart B]

okay so I reckon today the logs are being affected by the IAT (~40) but the second run had very little knock voltage (and the MAF readings are more what I would expect for a stock BAM eg 185g/s instead of 193g/s so I will do another run in a day or so then start to tweak the load - also the car was different eg a passenger and shopping in the boot (passenger was in the seat ) compared to yesterdays test.

http://my-worst-car.co.uk/ecuLogs/stockmapwithfuelrun2.csv