APR DTR6054 Direct Turbocharger Replacement System

[Wastegate13]

The big elephant in the room when it comes to this DTR turbo, it's got laaaag. While we can talk all day how we can or can not trust dyno numbers, dynos do a great job of showing the shape of an engine's power output while also showing the behavior of a specific turbo. APR claims from their website it makes peak torque around 4k rpm:

View attachment 256813

Dyno graphs for the DTR are very elusive, but I've caught a few:

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Seriously, why are these so hard to find...

So far we can say with decent confidence the DTR does not make full boost until about 4400rpm from the evidence. Even with the stock DP I fail to see how it is acceptable that this custom designed dual BB turbo, built from the ground up in the crystal labs of APR, still manages to spool 600rpms slower than a Vortex XL. 400rpms slower than advertised. Am I off the rocker here? Just look at the advert for this turbo, it sounds and looks like a slam dunk. This turbo lag would hit manual drivers the hardest as they wait for this literal snail to re-spool between shifts. For this reason they should probably place "For DSGs only" on the DTR page.

This kit would make a lot more sense with a much faster spooling IS38+ marketed to GTI owners as a stage 3 one stop shop solution, as this kit is already a hard sell for R owners anyways.

But the question is....is it possible APR could have built a turbo which delivers similar numbers as advertised, on the stock DP, and without all the lag?

EQT Proved to us, yes.....yes they could:

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I rest my case.

Could also be limiting torque knowing these are going on stock motor cars. My setup could probably make more torque down low but I like my rods inside the block.

 

[PerceivedShift]

Could also be limiting torque knowing these are going on stock motor cars. My setup could probably make more torque down low but I like my rods inside the block.

Limiting torque does not make a turbo spool faster or slower, tuning can help to a point, but meh…

Also, these engines are good to 450ftlbs of torque, 380 is nothing.

 

[aaronc7]

Look at any of the decent logs posted....it's just quite laggy, end of story. Laggier than I'd like anyways, especially for a turbo / tune limited to stock fueling system.

 

[Subliminal]

I f'ed up Sunday night and forgot to take a picture of my dad's new bike, a brand new BMW S1000RR - 205hp, 400 lbs. His last bike was a Hayabusa. I promise to do my due-diligence and snap a picture next time

Not the best pics, it was hard to get a good angle with the Mercedes in the way but here you go

 

[timmyturbo]

I guess I'll have to grab some logs. What do you want to see, 3rd gear pull, 2500 to red line? Despite what has been said I find this setup completely fine day to day. I have Acadia18's dragy for a little bit before I ship it back to him. I have only done 1 0-60mph run so far. On my way back from the gym early in the morning (before 6am) so it was like 60° out. I figured I would give it a go on a stretch of road near my house. This is the second launch I have ever done in this car since stock. I spun off the launch pretty good. I pulled off from basically the shoulder, so between worn out all seasons and all the sand and crap on the side of the road it wasn't a great start. If I remember it was a 3.7 something, but invalid due to slope. I figure in better conditions and a valid run, maybe a 3.5x to 3.7ish. This is the base kit, no additional fueling on a Audi S3 DQ381 7 speed dsg with a curb weight of nearly 3500lbs. I'm into this for as little as possible, I literally have just the turbo and tune, nothing else, no supporting mods aside from a dry flow filter. I installed it myself on a weekend, got flashed on a Monday, been completely fine for the last 2K miles or so. It does what I was looking for in a daily driven car that i go to work and back in plus maybe some short trips here and there, probably 400+ miles a week, still averaging 29ish mpg. I had a aftermarket downpipe and stage 2 tune prior. If you're looking for ultimate power or a 1/4 mile monster this definitely isn't that. It's stage 2 with a little spice sprinkled on top. People can quote all the dyno charts and logs they want, but I'm telling you all this from someone who has this kit installed in their car. If none of it sounds appealing to you, don't buy it. Believe it or not there is this whole world outside of golfmk7.com and the 6 people with this kit on here. Are there better performance options out there? Absolutely. Is this option for everyone? No, it depends what you're trying to achieve and your level of expectations. Will some buyer's be disappointed? I guarantee it. Do I find asking questions and answering them myself pedantic and stupid? Yes, yes I do

 

[Salami]

I have Acadia18's dragy for a little bit before I ship it back to him.

Since you have the Dragy any chance you can get some 1/8 or 1/4 mile times?

I'm looking for some data on how the base kit is working on a AWD DQ381 S3 or R.

 

[timmyturbo]

Since you have the Dragy any chance you can get some 1/8 or 1/4 mile times?

I'm looking for some data on how the base kit is working on a AWD DQ381 S3 or R.

1/8th mile is probably more likely, unless I find a really good straight roads around here that is somewhat secluded for a full 1/4 mile. There is enough farms around here where it's a possibility, which also means some of the roads are pretty garbage. I'm not looking to end up in a tobacco field or blow past residential homes at 100+mph. I know of some places that have potential, just got to find the time to get there.

 

[Wastegate13]

1/8th mile is probably more likely, unless I find a really good straight roads around here that is somewhat secluded for a full 1/4 mile. There is enough farms around here where it's a possibility, which also means some of the roads are pretty garbage. I'm not looking to end up in a tobacco field or blow past residential homes at 100+mph. I know of some places that have potential, just got to find the time to get there.

What do you think it’s gonna trap in the 1/8?

 

[Salami]

1/8th mile is probably more likely, unless I find a really good straight roads around here that is somewhat secluded for a full 1/4 mile. There is enough farms around here where it's a possibility, which also means some of the roads are pretty garbage. I'm not looking to end up in a tobacco field or blow past residential homes at 100+mph. I know of some places that have potential, just got to find the time to get there.

Totally understand. That is the biggest reason keeping me from buying a Dragy, finding a safe place use it that won't land me in jail.

 

[messrock]

Totally understand. That is the biggest reason keeping my from buying a Dragy, finding a safe place use it that won't land me in jail.

It’s all about the custom trackers. I don’t have anywhere I could safely pull to 130, still tryna find that golden 0-whatever spot too.

 

[PerceivedShift]

It’s all about the custom trackers. I don’t have anywhere I could safely pull to 130, still tryna find that golden 0-whatever spot too.

I miss the open empty roads of 2020 when people were too scared to step out of their homes.

 

[scrllock]

Limiting torque does not make a turbo spool faster or slower, tuning can help to a point, but meh…

Also, these engines are good to 450ftlbs of torque, 380 is nothing.

450 ft-lbs at 3000 rpm vs 5000 rpm is a very different story.

also... these ECUs target a torque set point, which in turn determines when the wastegate shuts. on the logs I've seen from a DTR6054 not tuned by APR, it was fully spooled up by 3600rpm, so if APR's tune is tapering off after 4k, that's because they're not targeting 100% torque until then.

 

[Superfreak]

I miss the open empty roads of 2020 when people were too scared to step out of their homes.

100%. We had so many enthusiast drives…just amazing. I miss that silver lining.

 

[CaptainRatty]

Totally understand. That is the biggest reason keeping me from buying a Dragy, finding a safe place use it that won't land me in jail.

Anddd this is why I sold mine.

 

[Salami]

Anddd this is why I sold mine.

And it sucks. Test and tunes seem to be almost non existant around me except for the dead of summer.

And I haven't found any where to use a Dragy safely.