lookin for boost logs, tuned and stock :)

dhangejr

Veteran Member
Joined
Mar 1, 2017
Location
PNW is my home
TDI
mk4 Jetta
here is a load of logs now that I have a VNT 17 hybrid FMIC, pd150 air box, 3" maf, pd150 TIP and intake manifold
The one titled
OK
is from tonight and I fixed a tiny boost leak you could hear, small tear in the hump hose...So there is no boost leaks. Just massive under fueling and over limited TQ and smoke maps.

Butt dyno and boost guage says the thing is boosting a little harder and holding a little stronger. for good examples see lines 1667 -1790 and 2253-2300. I think the fueling is getting confused because the software is not feeding the fuel for the air, the boost guage shows 20lbs holding, as expected spikes to 25ish. and then holds around 20, sometimes it will creep up to 22. I do not think the 2.5bar map sensor can keep up witht he mechanical boost gauge so I believe the gauge is telling me the truth. Hopefully sunday I can get the down pipe on and see how that lowers EGT this setup is warm, 400 at idle 600 cruzing and 1000 quickly on power request 1200 on WOT from 60-80 and boy is it doggy !

 

F5tdi

Member
Joined
Dec 17, 2023
Location
St neots, UK
TDI
A5 2.0 TDI Quattro 190 (DETA)
Reviving and old thread but would love some opinions on this.

Car was tuned by a local company, attached links to the data logging which was done.

I don’t know much about running but to me it looks like the actual boost is tracking requested boost but seems to be up to 400mbar below requested.


Sorry probably should have mentioned 2.0tdi 190 (DETA) with a map and no other mods.

Thanks
 

PradoTDI

Veteran Member
Joined
Sep 25, 2020
Location
MT
TDI
1991 Toyota LandCruiser LJ78 with ALH Swap
I have been meaning to make a log to add to this thread for a while. This is mine from this evening, was not able to be as "spirited" while driving as I would have liked due to road conditions, but hopefully there is enough data for it to be meaningful. No WOT pulls, speeds below 50mph for the most part, though my gearing is shorter and vehicle much heavier than a MK4 so it provides significantly more load on the engine when accelerating, even at lower speeds. Engine is an ALH from a 2000 Golf.

Mods are as follows:
BHW GT1749va turbo
Bosio DLC1019 injector nozzles
Malone Stage 4 tune (full deletes, including immobilizer for standalone operation)
3 bar MAP
Cheap cone air filter
Factory downpipe elbow to 2.5" side exit straight pipe

 

burpod

teh stallionz!!1
Joined
Nov 27, 2004
Location
cape cod, ma
TDI
82 rabbit vnt ahu, 98 jetta vnt ahu, 05 parts car, 88 scirocco.. :/
I have been meaning to make a log to add to this thread for a while. This is mine from this evening, was not able to be as "spirited" while driving as I would have liked due to road conditions, but hopefully there is enough data for it to be meaningful. No WOT pulls, speeds below 50mph for the most part, though my gearing is shorter and vehicle much heavier than a MK4 so it provides significantly more load on the engine when accelerating, even at lower speeds. Engine is an ALH from a 2000 Golf.

Mods are as follows:
BHW GT1749va turbo
Bosio DLC1019 injector nozzles
Malone Stage 4 tune (full deletes, including immobilizer for standalone operation)
3 bar MAP
Cheap cone air filter
Factory downpipe elbow to 2.5" side exit straight pipe

your n75 values look wayyyy lower than should be. since this is boost only and i don't know what else is going on (your altitude, fueling, etc) that cold be normal. given youre likely out in montana maybe you're at high elevation. that would be a huge factor in know if n75 "looked right" etc
 

PradoTDI

Veteran Member
Joined
Sep 25, 2020
Location
MT
TDI
1991 Toyota LandCruiser LJ78 with ALH Swap
Elevation is around 4600ft where I am. Not sure about any engine specific variables, but could easily take logs of more/different groups if that would help give any indication of how things are performing. I was able to give the throttle a decent stab a couple of times while taking that log, but doubt if I got much past 75% throttle due to the icy conditions. When conditions improve I will be able to get a more varied log.
 

burpod

teh stallionz!!1
Joined
Nov 27, 2004
Location
cape cod, ma
TDI
82 rabbit vnt ahu, 98 jetta vnt ahu, 05 parts car, 88 scirocco.. :/
Elevation is around 4600ft where I am. Not sure about any engine specific variables, but could easily take logs of more/different groups if that would help give any indication of how things are performing. I was able to give the throttle a decent stab a couple of times while taking that log, but doubt if I got much past 75% throttle due to the icy conditions. When conditions improve I will be able to get a more varied log.
it's hard to get good logs of all the data with stock measuring blocks. the best you can do, to get the most data, is log 3 blocks at once 011-001-004, and not the ambient air temps. but ideally, before doing that you would want to take other logs like 011-001-007 to get an idea of what sort of intake air temps you are seeing for similar driving. ever since definiing my own blocks, dealing with stock measuring blocks is a real limiting pita. it's a big handicap
 

PradoTDI

Veteran Member
Joined
Sep 25, 2020
Location
MT
TDI
1991 Toyota LandCruiser LJ78 with ALH Swap
it's hard to get good logs of all the data with stock measuring blocks. the best you can do, to get the most data, is log 3 blocks at once 011-001-004, and not the ambient air temps. but ideally, before doing that you would want to take other logs like 011-001-007 to get an idea of what sort of intake air temps you are seeing for similar driving. ever since definiing my own blocks, dealing with stock measuring blocks is a real limiting pita. it's a big handicap
I will have to give that a try next time I am logging data.
 

burpod

teh stallionz!!1
Joined
Nov 27, 2004
Location
cape cod, ma
TDI
82 rabbit vnt ahu, 98 jetta vnt ahu, 05 parts car, 88 scirocco.. :/
it's a short log, on the surface boost looks OK, but if you look closer at the n75 you can tell things aren't really right. a longer log with 011-001 would reveal more (eg, a whole commute/trip somewhere 20+min with some good varied driving in it). how does the car drive? my guess is power peters out above 3000. for 10mm/.215s the max target boost is too much, imo, given what i know about this tune
 

burpod

teh stallionz!!1
Joined
Nov 27, 2004
Location
cape cod, ma
TDI
82 rabbit vnt ahu, 98 jetta vnt ahu, 05 parts car, 88 scirocco.. :/
I thought he said....

:unsure:
oops misread that. given the likely QA position ("IQ") however, it's likely underfueled for the target boost higher up. 11mm/.215s can definitely warrant 24psi of boost. you can see how much boost it's making for lower requests and rpms with given n75 values, but there is a good higher gear pull in there, >3300rpm where you can see the n75 goes wayyyy lower than it should, gets a big boost spikes, then shoots way open, then closes way back down, then back up and is struggling to make boost. of course, this could be attributed to possibly other things. longer log would tell more
 

TurboABA

Top Post Dawg
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline '14 A6 Technik S-line
I'll blindly say that it's rolling coal instead... would be nice to see some EGTs or lambda data, etc.
 

BrettLu

Active member
Joined
Jul 22, 2016
Location
Martinez, CA
TDI
02 Golf
it's a short log, on the surface boost looks OK, but if you look closer at the n75 you can tell things aren't really right. a longer log with 011-001 would reveal more (eg, a whole commute/trip somewhere 20+min with some good varied driving in it). how does the car drive? my guess is power peters out above 3000. for 10mm/.215s the max target boost is too much, imo, given what i know about this tune
I should be able to get a log on my drive into work today.
oops misread that. given the likely QA position ("IQ") however, it's likely underfueled for the target boost higher up. 11mm/.215s can definitely warrant 24psi of boost. you can see how much boost it's making for lower requests and rpms with given n75 values, but there is a good higher gear pull in there, >3300rpm where you can see the n75 goes wayyyy lower than it should, gets a big boost spikes, then shoots way open, then closes way back down, then back up and is struggling to make boost. of course, this could be attributed to possibly other things. longer log would tell more
It's been a long time since I've played with anything so I'll have to see what I have the IQ set to. I played with it a lot a few years ago to get rid of the slowdown shudder and smoke.
It runs pretty clean, but that might be some help from the higher cetane of the "renewable resource diesel"
 

BrettLu

Active member
Joined
Jul 22, 2016
Location
Martinez, CA
TDI
02 Golf
I'll blindly say that it's rolling coal instead... would be nice to see some EGTs or lambda data, etc.
I never got around to putting a pyrometer on it even though I have a couple laying around from my years of playing with trucks. I adjusted the IQ on the pump to make it run with as little smoke as possible.
 

BrettLu

Active member
Joined
Jul 22, 2016
Location
Martinez, CA
TDI
02 Golf
EGTs are just a number.... who cares ;)
I used to pay attention to egt's tuning my 12 valve dodge, I spent many hours tuning it on the dyno, street, and at the track. When I started I'd go through the 1/4 mile traps at 1600-1800 degrees, I got it down to going through the traps around 1000 degrees (best time was 12.1 @ 115 MPH)
 

braddies

Veteran Member
Joined
Jul 26, 2021
Location
America
TDI
03 golf ALH
Tunezilla log 1
Took a log of 001 004 011 on a quick run up the highway for an exit and then back, there's a few WOT pulls through 3rd and a couple decently long 5th gear WOT.
Just getting started with logging.
Finally fixed the cigarette lighter (dirty contacts) and got a new inverter to keep the laptop charged so here's one of the first logs from 2003 ALH, 11mm pump, unknown injectors and bv39(Borg s7)
Timing graph also shows the line almost all the way up to the top line, wondering if I should try to lower that with adaptation.
Any insight? Thank you!
Car idles like a jackhammer but smooths out quickly, just got 43mpg on the last tank
 

burpod

teh stallionz!!1
Joined
Nov 27, 2004
Location
cape cod, ma
TDI
82 rabbit vnt ahu, 98 jetta vnt ahu, 05 parts car, 88 scirocco.. :/
Tunezilla log 1
Took a log of 001 004 011 on a quick run up the highway for an exit and then back, there's a few WOT pulls through 3rd and a couple decently long 5th gear WOT.
Just getting started with logging.
Finally fixed the cigarette lighter (dirty contacts) and got a new inverter to keep the laptop charged so here's one of the first logs from 2003 ALH, 11mm pump, unknown injectors and bv39(Borg s7)
Timing graph also shows the line almost all the way up to the top line, wondering if I should try to lower that with adaptation.
Any insight? Thank you!
Car idles like a jackhammer but smooths out quickly, just got 43mpg on the last tank
adaptation doesn't change physical timing. you do that with the pump pulley adjustment :)

betchya your car's running with too much advance, it's a killer ;)
 

braddies

Veteran Member
Joined
Jul 26, 2021
Location
America
TDI
03 golf ALH
adaptation doesn't change physical timing. you do that with the pump pulley adjustment :)

betchya your car's running with too much advance, it's a killer ;)
Ok, thanks, I need to read more to understand what adaptation Does change.

Is this involving the procedure of loosening the pump pulley bolts and nudging it back toward the firewall just a hair?
 

burpod

teh stallionz!!1
Joined
Nov 27, 2004
Location
cape cod, ma
TDI
82 rabbit vnt ahu, 98 jetta vnt ahu, 05 parts car, 88 scirocco.. :/
Is this involving the procedure of loosening the pump pulley bolts and nudging it back toward the firewall just a hair?
yes. blue line is your friend :p but of course depends what sort of mess is in your ecu :p
 

braddies

Veteran Member
Joined
Jul 26, 2021
Location
America
TDI
03 golf ALH
LoL yes mystery tune, supposedly, previous owner alluded to some kind of tune in the past, but guru who did timing belt said he didn't see any type of ID when he looked with vcds
 

burpod

teh stallionz!!1
Joined
Nov 27, 2004
Location
cape cod, ma
TDI
82 rabbit vnt ahu, 98 jetta vnt ahu, 05 parts car, 88 scirocco.. :/
LoL yes mystery tune, supposedly, previous owner alluded to some kind of tune in the past, but guru who did timing belt said he didn't see any type of ID when he looked with vcds
not many tunes change the software ID. brief check of your boost log shows it's definitely tuned, and it's not a malone tune because there are some ATDC timing values. can you post a link to the actual .csv? tunezilla is annoying.. 🥴
 

braddies

Veteran Member
Joined
Jul 26, 2021
Location
America
TDI
03 golf ALH
Thank you! Got to replace an alternator pulley tomorrow so while I'm in there I should be able to ever-so-slightly adjust the pump pulley, I say "should" because this will be the first time doing so. Also got another intake manifold bolt to put in because one is missing
 
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