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TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old July 18th, 2018, 01:18   #1
robotelu97
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Default PD130 VNT17/22 Overboost

Hello , I just got an 17/22 for my ASZ. The car is mapped for the stock asz turbo VNT1749VA. After Replacing the turbo and changing the oil/filters I am seeing turbo lag and overboosting. I am posting a log.The car has straight exhaust till muffler.Here is the log done in 3rd gear: https://imgur.com/a/xaCXOIv
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Old July 18th, 2018, 08:49   #2
Yourbuddysatin
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Is it a used or new turbo? Good chance if used the veins are gummed up. The actuator could be out of adjument also.

Last edited by Yourbuddysatin; July 18th, 2018 at 09:02.
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Old July 18th, 2018, 10:37   #3
Nevada_TDI
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It takes a lot more fuel to spool a 17/22 than a regular vnt-17 so your tune needs to be adjusted for it, and once the turbo does spool up there is too much boost.
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Old July 18th, 2018, 12:18   #4
robotelu97
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The turbo is brand new. I am thinking of a bad N75 valve or maybe boost leaks ?
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Old July 18th, 2018, 15:19   #5
Nevada_TDI
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Did the original turbo do the same things? If not, it is very likely you need to be re-tuned.
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Old July 18th, 2018, 17:15   #6
Yourbuddysatin
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Quote:
Originally Posted by robotelu97 View Post
The turbo is brand new. I am thinking of a bad N75 valve or maybe boost leaks ?
Pull vacuum on the actuator and make sure it is adjusted correctly. It is possible the actuator is out of adjustment even being new. Kinda doubt the n75 myself but it is possible. Like Nevada stated above...proper tune could be the problem.
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Old July 19th, 2018, 02:40   #7
robotelu97
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It did not however when it started making strange noise it did.It is hard to adjust the actuator ? Is there a tutorial ? I am newbish in this kind of area.Also , it's the 55mm straight exhaust enough for the 17/22 ? Some people told me i need 63mm.
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Old July 19th, 2018, 07:55   #8
Yourbuddysatin
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https://m.youtube.com/watch?v=A476plY-sjo&t=99s
That is a good video of how to make sure it’s correct. Being stock tune 55mm is ok but once you tune it you’ll want larger to push the egts out lower. Is your 17/22 electric actuated? If it is then the above video will not help.
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Old July 19th, 2018, 08:49   #9
robotelu97
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Nope , it vacuumatic, can i adjust it on the car ?

Last edited by robotelu97; July 19th, 2018 at 08:52.
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Old July 19th, 2018, 09:28   #10
Yourbuddysatin
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Uhh yes but I have to say it’s not easy. Is your Audi transverse or longitudinal?
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Old July 19th, 2018, 11:36   #11
robotelu97
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It's PD130 ASZ , i think transverse, Audi a3
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Old July 19th, 2018, 14:26   #12
Yourbuddysatin
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Well it may be wise to just pull it off and check it then if it is out you can adjust it way easier on a bench. Usually how I’ve done it.
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