APR Stage 1 Boost

[smblk406]

I don't have a boost gauge so I thought I would ask. I have a stage 1 APR tune on my 09 Wolfsburg. I was wondering what the boost level is on the stage 1 tune.

Thanks!!

[JettaGT8V80]

spike at 21ish and levels off at 17-18 i believe

[pb4life545]

i pretty sure its peak at 17-18 and hold at 15

[s t a y g o l d]

spike at 21ish and levels off at 17-18 i believe

[waittllnextyear]

spike at 21ish and levels off at 17-18 i believe

I've got a boost gauge on mine and this is the numbers that I get. 15 and 18 are the stock numbers

[MASSSCREW]

I spike @ 21

hold @ 19/20

[lightsniper]

i would highly recommend getting a boost gauge..
my buddy has stage 2 software on his mk4 gti and he noticed he was under boosting
turns out he needs a new turbo

boost gauges are more than just looks

[bryangb]

You stage 1 guys are holding 18-19psi?

[lightsniper]

i have stage 1 eurodyne and i hit 20lbs and hold 15-16

[THE KILLER RABBIT]

http://www.youtube.com/watch?v=fxTybvKSp0o


http://www.youtube.com/watch?v=SnnLiPJivP8
quick pull i did to make sure the gauge was working before i installed it fully.

[Fuk It MkV]

You stage 1 guys are holding 18-19psi?

Yeah Im pretty sure thats what Im hitting with Unitronic stage 2...

[bgalex]

I got 18-20 peak and hold at 19 with STAGE 1.

I am at 25 peak and holding at 24 with STAGE 2.

I am with REVO.

[TheHeggz]

I've got a boost gauge on mine and this is the numbers that I get. 15 and 18 are the stock numbers

15 and 18 are NOT stock numbers...

and how are you guys peaking 21psi on APR stage 1? Or is everybody just posting their random tunes now?

AND are Stage 1 TSI numbers any different than FSI, which is what the OP is vs. what everybody who is posting has...

great thread.

[bgalex]

Stock boost are 10-13...
Stage 1: 13-18
Stage 2: 18-25

At least those are the ones I GOT when i WAS stock and then got REVO..

[THE KILLER RABBIT]

15 and 18 are NOT stock numbers...

and how are you guys peaking 21psi on APR stage 1? Or is everybody just posting their random tunes now?

AND are Stage 1 TSI numbers any different than FSI, which is what the OP is vs. what everybody who is posting has...

great thread.

people like to say they have so much boost dont understand how the k03 works

[bryangb]

I got 18-20 peak and hold at 19 with STAGE 1.

I am at 25 peak and holding at 24 with STAGE 2.

I am with REVO.

You hold 24 psi at wide open theottle?

"theottle boosting" does not count either like in the video above. Theottle boosting will build more boost than what you will actually see when driving the car at wot in the correct gear

[bgalex]

You hold 24 psi at wide open theottle?

Ya at WOT im at 24 and starts to drop to 20 by 4-6.5k RPM.

[bryangb]

Ya at WOT im at 24 and starts to drop to 20 by 4-6.5k RPM.

Please take a video

[BobRenob]

sorry but i'm calling BS. K03's die out dramatically in the high rpm and there's no way anyone's holding 18psi at the end of their rpm band with a stage1 k03 no matter what tune they have.

[bgalex]

Please take a video

Will do when I get a chance!

[kern417]

[lightsniper]

sorry but i'm calling BS. K03's die out dramatically in the high rpm and there's no way anyone's holding 18psi at the end of their rpm band with a stage1 k03 no matter what tune they have.

agreed. this video should be interesting!

[bryangb]

If anyone is holding 24psi at even 4k I wanna see it. I'm not even gonna discuss 20psi at 6k

Video please!

[tomshouse516]

Haha I spike 24psi but only hold slightly less than 20psi wot. At 5k the boost goes Like

Stage 2

[BobRenob]

agreed. this video should be interesting!

Yeah I'll believe it when I see it. And I wonder how accurate analog boost gauges are compared to digital or compare to other analog gauges of different brands? Maybe that plays in a role in this confusion? Or everyone's just talking out of their asses that's also an option

[nuff said]

I had apr before I switched to Giac. Stage 1 apr for me ran 18psi drop to 15 at redline .That was with stock downpipe .If you have an aftermarket exhaust ,I would think you should get 20/21
psi

[nuff said]

I hold 25 psi with virtually no fade.I know you will likely call bs but I am not kidding.I have giac
x plus ,venair intake ,3 inch dp ,forge 007 dv,mbc,forced cold air intake,n75 race valve ,wastegate hose mod.

[bryangb]

I just don't believe a ko3 is producing a steady 25psi. Please people. VIDEOS.

What is your wastegate hose mod you referred to? Never heard of it

[RobbS]

I just don't believe a ko3 is producing a steady 25psi. Please people. VIDEOS.

What is your wastegate hose mod you referred to? Never heard of it

It's way out of its efficiency range.

With a bit of a search:

Flow rates:

K03 - ~320CFM
K04 - ~400CFM

In comparison to the DSM world

DSM T25 - 280CFM
DSM 14B - 405CFM

I wouldn't feel comfortable running more than 80% of a turbo's maximum rated CFM, speaking from a standpoint of longevity and reliability. I believe K04's start loosing efficiency after ~26-28lbs (correct me if I'm wrong) I wouldn't run more than 22-24PSI on a K04 with proper cooldown and warmup on 93.

K03 becomes inefficient above 19.2lbs

[TheHeggz]

Thank you Robb. It's not that you CAN'T do it (especially with a MBC and wastegate mods like nuffsaid has), it's just stupid to do unless you're trying to lose a turbo quickly. There's not much talk of that kind of thing on here because 1) it's stupid and 2) it's not smart.