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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 December 26th, 2019, 16:36   #151
turbobrick240
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Sweet, nothing a good tune shouldn't fix. Hope you can share some dyno results when you get a chance.
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Old December 27th, 2019, 08:03   #152
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Originally Posted by turbobrick240 View Post
Sweet, nothing a good tune shouldn't fix. Hope you can share some dyno results when you get a chance.
I think they dyno operator where I take it is getting tired of seeing me
Super nice people and really clean shop, but he has trouble starting off in 4th gear on the dynapack. He almost gave up the last time and wanted to say it was the tuning until he got it going!
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Old December 27th, 2019, 08:54   #153
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Is that a hub dyno? I'm not at all familiar with those. On the Mustang dyno's I've used you can start in first and go up through the gears on the roller. For your big turbo you might actually get better loading/spool in 5th gear.
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Old December 27th, 2019, 15:32   #154
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It's a hub dyno which is harder to start and shift gears, and last time I was there we talked about extending the runs to get more load put on it. All my base runs and the gtd1752 were 6 seconds which is pretty short. I'll ask him next time to try 10-12 seconds though.

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Old January 12th, 2020, 08:16   #155
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Went out and did some logging with boost, egt, fuel pressure and had some 4500rpm low fuel rail pressure codes send me into limp mode. Couple days later logged just boost and actuator % and was able to romp on it with zero codes set or limp mode at low rpm/high boost request. Several runs through the gears, a couple 3rd gear runs from 1500rpm to 4800, and a 4th gear from 1800-4500rpm with no codes or limp mode set. Was pretty surprised. Even on the current tune meant for the 1752vrk, this thing is inching close to 900C EGT on the very high end. Boost is also getting to 2.5bar on a 2.1 requested but only after 3500rpm or so (2.3-2.4bar will be the target I believe) . Have probably put about 800 miles on the car since install and everything is going well.

Just waiting to get an updated tune, response isn't quite right when trying to get into it quickly unless it's at really high rpm. I'm hoping it can get a bit more lively by 2500rpm and transient response restored somewhat as this thing is practically smokeless no matter how hard I try. I'm not expecting it to be anywhere as responsive as the 1752, but I definitely think there's room for more.
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Old January 13th, 2020, 07:42   #156
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I'm sure a good 2260 specific tune will make a big improvement. Though the 1752vrk probably did spoil you somewhat as far as transient response and spool goes. All that top end should more than make up for a few extra downshifts.
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Old February 15th, 2020, 09:41   #157
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Quote:
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I'm sure a good 2260 specific tune will make a big improvement. Though the 1752vrk probably did spoil you somewhat as far as transient response and spool goes. All that top end should more than make up for a few extra downshifts.
Just the first tune update made a night and day difference! Car feels awesome, and tuning is still not finished so I'm pleasantly surprised at this point. Had my worst tank for fuel economy since before I had stock exhaust still in place...44.5mpg for a tank of almost exclusively datalogging haha!
Transient response (as long as you're in the proper revs) is actually really good with this turbo. 10psi by 2k rpm is plenty for getting around town, by ~2600rpm you have peak boost if you need it.
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Old March 11th, 2020, 10:00   #158
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Well, looks like I have a small exhaust leak coming from the turbine housing. Hard to tell if it's new or old so will keep an eye on it. No oil residue anywhere and oil level is perfectly normal.
Soot lightly covering the firewall and actuator in the pic as well as a little on the compressor housing.

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Old March 11th, 2020, 10:30   #159
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Missing O ring seal maybe!
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Old March 11th, 2020, 14:36   #160
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The 2260vklr should make easy 2 bar @2600-2700rpm if tuned correctly (at least on the old CR, dont know this new one).
For the leak maybe the oring is badly pressed inside or deformed and doesnt seal. That leak is not good.
Go into vcds and see voltages for the actuator at full open and closed.
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Old March 11th, 2020, 16:45   #161
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Missing O ring seal maybe!
they have an o-ring in the turbine housing? I've seen the piston ring style seals in the later two-piece VNT housings but never an o-ring on the turbine side
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Old March 11th, 2020, 17:02   #162
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they have an o-ring in the turbine housing? I've seen the piston ring style seals in the later two-piece VNT housings but never an o-ring on the turbine side
I guess O-ring is not proper term. There is a large gasket on turbine side that keep the leaks from happening. I guess turbine gasket is more appropriate term.
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Old March 13th, 2020, 07:10   #163
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It does look like there is a piston ring style seal for this. I asked the assembler for details as I believe they need to make this right..it should not be leaking after only 3-4k miles. Starting to regret where I bought this from...these are basic assembly issues that should just not happen.
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Old March 15th, 2020, 01:53   #164
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Its a v-profile sheet metal ring gasket.
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Old March 15th, 2020, 22:58   #165
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Is it your stop screw missing ?
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