For those of you who want to go K04

[iconoclast]

More on this later.

updates?

[Highlander1010]

updates?

Tracking down an issue. I am having 2 problems right now since the K04 install:


1. No power supplied in 1st gear for a few seconds until a sudden spurt
2. Rough shifts (like going from 5th to 3rd at high speed – a sort of push you forward in the seat thump) at 1->2nd or 2nd->3rd

These things happen about 3-4 times per week. Any thoughts or experiences with this before?

[iconoclast]

unfortunately i am not familiar...

[dscline]

Arin - can you please post the new official APR map for our K04 upgrade and then tell us what it will take to motivate APR to do the work above to get to the Transverse #'s?

Sorry to rehash this again, but I don't think we ever got any clarification on the differences between the various plots (or maybe we did, and I just completely missed it). Personally, I'm still confused. Here's APR's current B8 K04 plot:




We know that isn't exactly the same as the original published B8 K04 plot, but *I* have never been clear on whether the previous version and this version represent v1 and v2, respectively, or if the current plot is just an updated test of the v1 software. Regardless, they are both very different from the transverse K04 plot:




Obviously, the scales of the two graphs are different, they are different cars with slightly different setups, different dyno runs, etc. So the two can't be directly compared. But what strikes me is not the difference in the absolute numbers, but the difference in the shape of the torque curve. Below 2400 rpm the B8 K04 is actually quite a bit worse than a stock B8, while the transverse K04 appears to have a significant advantage over stock all the way down to at least 2000 RPM.

So, is the first plot above the V2 tune, or is it just an updated plot of the V1 tune? If that's still the V1 tune, is the V2 tune more similar to the current transverse plot? I know this is getting to be a bit of an old question, but even if the v2 plot isn't available yet, just a little clarification on this would be really helpful.

Thanks!

[iconoclast]

it would be nice if apr had a bit of consistency and used either wheel or crank for all their data, secondly would be best if they could show us the differences between v1 and v2 from their own testing... i am going to be a realist here and say that they themselves barely realized any gains between the two and that is why they are not bothering posting data on their site or on any forum that members requested it. even contacting them directly they state they do not have it.

[dscline]

it would be nice if apr had a bit of consistency and used either wheel or crank for all their data

Actually, I just realized they do have crank data for the transverse, so I updated my post to show that plot to make the two more directly comparable.

i am going to be a realist here and say that they themselves barely realized any gains between the two and that is why they are not bothering posting data on their site or on any forum that members requested it.

But if that's the case, the question is, why can't they get similar performance when the same engine is longitudinally mounted as they do with the K04 in the transverse orientation? I don't even really mind so much that the transverse engine makes more power. What concerns me more is the way the the B8 tune appears to be a bit of a dog below 2500 RPM. I understand the K04 is a slightly larger turbo than stock, and I've even seen complaints about lag in the (stock) S3. But it at least appears that APR has managed to maintain good (better than stock) torque at least down to 2k in the transverse K04 kit... can that not be done in the B8 with the same engine and same turbo? If not, why not?

[TEXAS-AVANT]

[QUOTE=Highlander1010;8522852]Tracking down an issue. I am having 2 problems right now since the K04 install:


1. No power supplied in 1st gear for a few seconds until a sudden spurt

ESP/ASR on?

[A4 Centaur]

This may sound weird but are your engine mounts new or are they shot? Heard loose engine mounts can affect modded engines for some unknown reason. A guy with a B7 told me this a few years back.

[Highlander1010]

This may sound weird but are your engine mounts new or are they shot? Heard loose engine mounts can affect modded engines for some unknown reason. A guy with a B7 told me this a few years back.

No clue on how to check, but I'm in for my 35K service on Friday so I'll ask my dealer to look at them. I'm not experiencing much rattle or shimmy, so I don't think so overall. I'm wondering if it is an issue with fluids or a clogged filter somewhere.

[A4 Centaur]

That sounds more plausible. A clogged fuel line or pump going bad. Have you been able to check any logs with VCDS or a VAGCOM tool?

[Highlander1010]

That sounds more plausible. A clogged fuel line or pump going bad. Have you been able to check any logs with VCDS or a VAGCOM tool?

I've had zero time between work and family. I'm going to try to find time again tonight.

[K1_Builder]

it would be nice if apr had a bit of consistency and used either wheel or crank for all their data, secondly would be best if they could show us the differences between v1 and v2 from their own testing... i am going to be a realist here and say that they themselves barely realized any gains between the two and that is why they are not bothering posting data on their site or on any forum that members requested it. even contacting them directly they state they do not have it.

Check my post. Difference is definitely noticeable and much smoother versus V1. All around a much better map.
http://www.audizine.com/forum/showth...results-are-in!!!!