APR DTR6054 Direct Turbocharger Replacement System

[CarbonDub]

Now now- don't be salty because I spent the money on a VAQ equipped carbon GTI, hold the one tire fires.

In all honesty, the wider tires could work also be contributing to spinning, depending upon the tread pattern. Wider tires don't mean more contact patch, just a different shape of contact patch. Probably helps a lot in cornering and normal spirited driving, while sacrificing some straight line grip.
Weight of the car vs PSI of the tire determines the size of the contact patch- did you remember to air them down? (honestly, I totally forgot to my first time at the track, so I drove 140 kms and got them warm and the psi high from highway drive, which definitely cost me some time on my first couple runs)

I dunno, they’re Michelin PS4S which are I feel are pretty grippy. I know my speedometer reads low because of the increased diameter, but I’ve never heard of it contributing to spin.

ESC aside there’s definitely more I could have done to mitigate the spin. I kept launching from 4k instead of dropping down to 3.5K, and I kept my tires fully inflated because I was relatively satisfied with my 60’ and wasn’t thinking about it potentially helping down the track.

 

[AeroRick08]

Middle of the night here because this is when I can go unnoticed for 60-130 times. With the power band shift and driving a manual I’ll leave the drag strip work for the DSG folks here lol.

Ran a bunch of runs in the same spot with stage 1 IS38 before vs DTR upgrade tonight, no fueling/mpi, same 93 Octane.

Could not even match the IS38… not sure temp/DA was far enough off to explain any of it away. I start around 45mph to have it spooled up by 60mph, pulling from 4th gear and shift to 5th at 7k, tried to do same with IS38. Also tried starting in 3rd with mixed results, Needing 2 shifts, and still worse in the end.

Tried doing some logging with OBDeleven PRO but for some reason charts is not an option under engine menu… someone help… next step will be to figure that out and do some runs before dyno.

Thoughts? Was thinking I’d be running <12.5s runs with this…

 

[boostnonu]

THIS SHIT SUCKS! This situation not necessarily the turbo yet.

 

[Daks]

I’m faster than all these cars.

 

[boostnonu]

We need to get ED to make a “I don’t give a shit about CARB tune” obviously APR has to keep so much of the stock tune BS in their tune to keep it CARB compliant. Disappointment is here but EVERYONE is still comparing this tune to the others that have free rein on what they want.

 

[CarbonDub]

At this point I think it’s pretty safe to say the DTR is not going to be as quick as IS38 with downpipe on any platform.

Just my opinion but APR probably didn’t release their test results to avoid drawing this very comparison. There’s no way they did extensive track testing for years and didn’t log any times… Probably just didn’t log any “marketable” times.

I get that it SHOULD be compared to IS38 with stock downpipe, but practically speaking no GTI runs that setup, and for the exact same reason DTR folks are experiencing. Under most circumstances why would you put in the effort to go big turbo and then choke it up? So although the IS38 stock downpipe comparison is fair, it’s mostly a moot point.

For GTI folks, the DTR is the best emissions compliant upgrade from Stage 1, but that’s about it.

I’ll say that coming from Stage 1 it’s definitely a lot of fun, and probably even more so if you’re like me and have never driven an IS38 car.

 

[JC_451]

If you ran an emissions compliant IS38 tune what kind of pow-pow would it make?

 

[CarbonDub]

If you ran an emissions compliant IS38 tune what kind of pow-pow would it make?

A hair over Stage 2 from what I recall, like 340ish whp.

Found it:

Post in thread 'APR tune IS38 with stock downpipe'
https://golfmk7.com/forums/index.php?threads/apr-tune-is38-with-stock-downpipe.399944/post-7815106

 

[Malingerer]

THIS SHIT SUCKS! This situation not necessarily the turbo yet.

No, at this point I think it’s safe to say this Turbo sucks

 

[CarbonDub]

No, at this point I think it’s safe to say this Turbo sucks

Wait… you’re right! Thank god someone was finally brave enough to say it.

/thread

 

[crxgator]

Here was my GTI, IS38, JB4 and stock downpipe Dyno vs modified downpipe. The lower numbers are stock downpipe. So the DTR has quite a bit more power.

 

[CarbonDub]

Here was my GTI, IS38, JB4 and stock downpipe Dyno vs modified downpipe. The lower numbers are stock downpipe. So the DTR has quite a bit more power.


View attachment 251475
View attachment 251476

Take your numbers elsewhere, the DTR sucks. It’s slower than stock and APR is defrauding it’s customers and stockholders. Also I don’t much care for your profile pic… And your father smelt of elderberries.

 

[Salami]

First pass, not impressed - especially not the trap speed. Nowhere near 115 where I expected (at minimum)

View attachment 251356

Was this the only pass made?

 

[PerceivedShift]

The DTR upgrade is still awaiting CARB compliance, pending testing. So far for whatever reason real world results aren't much faster than the quicker spooling IS38, perhaps the stock DP just can't efficiently flow 400whp, shoot, consensus before all this blew up was the stock DP couldn't do much more than 300whp. Just barely tipping 400whp and CARB approval (hopefully) on the stock DP sounds great for marketing but the fact remains the stock DP is a bottleneck. If you push your powerband higher but lose too much area under the curve down low, in effect you haven't gained any power, only the "400whp Club Badge".

I still think this could be a decent upgrade for GTIs, but it's a harder sell for the R's. Perhaps people who don't care for CARB can buy this kit for a power bump, then later install a DP, IC, and custom tune later for a significant power bump. I'd still like to see what this turbo can do when let loose.

 

[Desslok]

Remember when there was a rash of downpipes for sale when this turbo first came out?

Pepperidge Farm remembers.