APR DTR6054 Direct Turbocharger Replacement System

[riceburner]

^oh i get that, i mean for overall power, or acheiving something close to the claimed numbers.

Ill have to see if someone can log me. Anyone in my area?

 

[GTI Jake]

IC won't help with the lag unless you start the pull severely heat soaked already. We need wastegate data!

I’ve seen a 67whp deficit on a stage 2 car w/o a IC upgrade under the curve and 21 peak IIRC.

This wasn’t some extreme example, all three pulls were about the same for both. You use forth gear on the dyno, which the factory IC isn’t even good for one entire pull of if it’s even remotely warm out.

 

[mrmatto]

I’ve seen a 67whp deficit on a stage 2 car w/o a IC upgrade under the curve and 21 peak IIRC.

This wasn’t some extreme example, all three pulls were about the same for both. You use forth gear on the dyno, which the factory IC isn’t even good for one entire pull of if it’s even remotely warm out.

To add to this: The DTR setup is hitting most of its peak power in the high RPMs, and that's exactly where the factory IC fails and allows high IAT. I don't see how the stock IC wouldn't significantly negatively affect this setup.

 

[branman1]

I have an efficient enough intercooler to keep IATs between 5-10 above ambient after back to back runs. Rice’s review/feeling is still accurate in this feeling less powerful than an is38 GTI/GOLFR.

Edit: not saying an intercooler isn’t important but I don’t think that’s the reason Rice isn’t impressed.

 

[SnailPower]

I have an efficient enough intercooler to keep IATs between 5-10 above ambient after back to back runs. Rice’s review/feeling is still accurate in this feeling less powerful than an is38 GTI/GOLFR.

Edit: not saying an intercooler isn’t important but I don’t think that’s the reason Rice isn’t impressed.

What do you mean with referencing efficient enough intercooler? Aren't almost all A/M intercoolers said to allow up to 600hp? What kind of intercooler do you got that is better than stock but not able to handle 600hp where you can leave "efficient enough" out? Just curious

 

[ZuMBLe]

I’ve seen a 67whp deficit on a stage 2 car w/o a IC upgrade under the curve and 21 peak IIRC.

This wasn’t some extreme example, all three pulls were about the same for both. You use forth gear on the dyno, which the factory IC isn’t even good for one entire pull of if it’s even remotely warm out.

Not denying that. The ECU pulls timing based off IAT and the air is less dense. But the IC should not have any affect on spool on the street. This is why we need wastegate data to understand if it's the tune or the turbo.

 

[ZuMBLe]

I have an efficient enough intercooler to keep IATs between 5-10 above ambient after back to back runs. Rice’s review/feeling is still accurate in this feeling less powerful than an is38 GTI/GOLFR.

Edit: not saying an intercooler isn’t important but I don’t think that’s the reason Rice isn’t impressed.

Exactly.. it kind spools like shit for a turbo that's not much bigger than a IS38. I want so badly to like this turbo.

 

[PerceivedShift]

Exactly.. it kind spools like shit for a turbo that's not much bigger than a IS38. I want so badly to like this turbo.

This, when I see a Vortex make a much fatter power band while spooling hundreds of RPMs sooner on the stock DP it makes me wonder what is going on. Is it the turbo or is it APRs tune? On paper this turbo looks amazing for the price, so I hope its APRs tune...

 

[aaronc7]

Here's a basically stock s3 (is38) I've been working on, a datalog for reference/comparison. It's on E45 in this log, but basically everything is the same on 91 other than less ign timing.

https://datazap.me/u/aaronc7/sharks-v17-4th?log=0&data=10-16

 

[AeroRick08]

Can't believe I'm asking this but does anyone know how to slightly muffle the whistle... is it due to the turbo muffler delete or sound coming through the intake? There's a sweet spot for the amount of whistle that's desirable, and I'd either add a custom solution or change my intake if needed... there's a big difference between letting you know it's there and sounding like a dump truck

 

[Diggs24]

Put the stock airbox back in with an AFE panel filter.

 

[branman1]

Put the stock airbox back in with an AFE panel filter.

Who you talking to lol

 

[Diggs24]

Dude that has an open intake as his avatar and asking how to make a turbo whistle less.

 

[branman1]

What do you mean with referencing efficient enough intercooler? Aren't almost all A/M intercoolers said to allow up to 600hp? What kind of intercooler do you got that is better than stock but not able to handle 600hp where you can leave "efficient enough" out? Just curious

Well I was asked specifically if I had an APR intercooler when I presented this issue. The Mishimoto might not be as efficient but it appears to be efficient enough for the setup.

 

[riceburner]

I’ve seen a 67whp deficit on a stage 2 car w/o a IC upgrade under the curve and 21 peak IIRC.

This wasn’t some extreme example, all three pulls were about the same for both. You use forth gear on the dyno, which the factory IC isn’t even good for one entire pull of if it’s even remotely warm out.

Noted - do you mean its first pull was X and by pull 3 it was X-67whp?

Again i DO get that an intercooler should certainly help - and i REALLY don't wish to muddy waters much more or berade the issue - but i could also argue that, why would my IS38 have felt stronger, considering it was being pushed much harder, and being a smaller, definitely hotter turbo, compared to this setup? In other words, i feel like if i had an intercooler on the IS38 setup, then it may well have STILL felt faster than this setup with an intercooler. Like, at least it's apples to apples, somewhat.

To add to this: The DTR setup is hitting most of its peak power in the high RPMs, and that's exactly where the factory IC fails and allows high IAT. I don't see how the stock IC wouldn't significantly negatively affect this setup.

Also a good point, and can be some nuance added to the above reply.

I have an efficient enough intercooler to keep IATs between 5-10 above ambient after back to back runs. Rice’s review/feeling is still accurate in this feeling less powerful than an is38 GTI/GOLFR.

Edit: not saying an intercooler isn’t important but I don’t think that’s the reason Rice isn’t impressed.

Case in point

Can't believe I'm asking this but does anyone know how to slightly muffle the whistle... is it due to the turbo muffler delete or sound coming through the intake? There's a sweet spot for the amount of whistle that's desirable, and I'd either add a custom solution or change my intake if needed... there's a big difference between letting you know it's there and sounding like a dump truck

Hate to agree, but i agree. lol. After a 3 hour commute yesterday i think i've had enough whistle. Might have to swap in a stock airbox with upgraded panel, or just a closed intake. It would probably be fine like that.