Hi guys,
My car is a 2004 Bora 1.9tdi, the original engine is an ATD 74kw(pd100). I'v swapped the engine to a brand new AWX 96kw(pd130 GT1749VA) form 2005 passat b5 since 200k km. I'v remapped the ECU to 165hp/385Nm(software calculated). 'cause I can't find the dyno machine around me. so I did 0-100km acceleration test on same weather and road condition. before tune is 9.5s, after tune is 7.9s.
After the "new" engine has run 100k km, I did some upgrades for my car:
- brand new GT1749VB turbocharger form darkside
- 2" intercooler plumbing and large SMIC form darkside
- 2.5" decat downpipe form darkside
- pd150 intake manifold form darkside
- 57mm EGR delete kit form darkside
- south bend stage2 daily clutch w/ 22 lbs single mass flywheel
I just installed the upgraded hardware a few days ago, and re-tuned ECU to 190hp/410Nm. then go test drive and VCDS log. The actual driving experience is huge turbo lag. under 2000 rpm has no boost at all. especially 1200~1500 rpm, basically no reaction of the gas pedal stepping down.
According to the log file, after 3~4 seconds the actual pressure eventually reach the specified value, and no overboost. I noticed that at nearly 4000 rpm of 3gear WOT pull, the N75 duty cycle is only 60ish%. I heard that it should be 70%~80%. Does this mean that the VNT rod length is too long? But this is a brand new authentic Garett turbocharger, all the screws and nuts have color paint marks, I dare not adjust it.
btw, I also tested the turbo actuator by a hand pump, it starts at 2 inch and hits the stop screw at 18 inch.
and I did basic settings group 11 in VCDS, ON is 1080mbar OFF is 970mbar.
all vacuum line are new, brand new N75(unplug the line to airbox and replace it with a little airfiler), vacuum no leak(25 inch on VAC of N75). It seems no problem at all, but still got turbo lag very much!
Any suggestions? thanks!
stiffy
some logs
3gear pull MAP
3gear pull MAF
another 3gear MAP
a little "normal" drive
My car is a 2004 Bora 1.9tdi, the original engine is an ATD 74kw(pd100). I'v swapped the engine to a brand new AWX 96kw(pd130 GT1749VA) form 2005 passat b5 since 200k km. I'v remapped the ECU to 165hp/385Nm(software calculated). 'cause I can't find the dyno machine around me. so I did 0-100km acceleration test on same weather and road condition. before tune is 9.5s, after tune is 7.9s.
After the "new" engine has run 100k km, I did some upgrades for my car:
- brand new GT1749VB turbocharger form darkside
- 2" intercooler plumbing and large SMIC form darkside
- 2.5" decat downpipe form darkside
- pd150 intake manifold form darkside
- 57mm EGR delete kit form darkside
- south bend stage2 daily clutch w/ 22 lbs single mass flywheel
I just installed the upgraded hardware a few days ago, and re-tuned ECU to 190hp/410Nm. then go test drive and VCDS log. The actual driving experience is huge turbo lag. under 2000 rpm has no boost at all. especially 1200~1500 rpm, basically no reaction of the gas pedal stepping down.
According to the log file, after 3~4 seconds the actual pressure eventually reach the specified value, and no overboost. I noticed that at nearly 4000 rpm of 3gear WOT pull, the N75 duty cycle is only 60ish%. I heard that it should be 70%~80%. Does this mean that the VNT rod length is too long? But this is a brand new authentic Garett turbocharger, all the screws and nuts have color paint marks, I dare not adjust it.
btw, I also tested the turbo actuator by a hand pump, it starts at 2 inch and hits the stop screw at 18 inch.
and I did basic settings group 11 in VCDS, ON is 1080mbar OFF is 970mbar.
all vacuum line are new, brand new N75(unplug the line to airbox and replace it with a little airfiler), vacuum no leak(25 inch on VAC of N75). It seems no problem at all, but still got turbo lag very much!
Any suggestions? thanks!
stiffy
some logs
3gear pull MAP
3gear pull MAF
another 3gear MAP
a little "normal" drive