Jamez

to expensive NKG plugs. Colder than OEM.
Also tried some bosch FD5POR special platin plugs, also expensive, but they did not run as good.

I believe the atmosphere dumpvalve and rich mixture otherwise leads to my "afterburners"

some less fuel wont harm me I believe. I might even get some less drawback on timings as o2 wont run as rich...

Audi2ptzero

BTW what wide band are you using?

If your car is pulling timing back during WOT then your not going to be able to lean it out since that will just cause the ecu to pull more timing. First off you need to see what the AFR is during WOT.

Jamez

So the car wont pull timing if running rich?
Only when running lean?

I find it hard to believe its running lean @3.5k rpm. With a 3" MAF that should increase flow about 60% but 440cc's @ 4bar is a ~100% increase.

Ill do some logs both from the wideband and the vagcom as soon as I have some extra time...

@WOT when running from standstill, through gears, I keep a RPM that high that it never gets to pull timing... Runs well this way...

BTW. 291whp isnt too bad on a gt25 turbo, is it?
I believe this is a apr s3-turbo...

Jamez

Jamez

But no BOV sound with those, right?

Also, I have it reloacated before the TB.

Jamez.

Mat Indukts Lambos

lemme see if I can find a pic. Well there's one on my stalker photo page.....



running a bpv setup over a bov will help you, definitely. It'll lessen the richness you have...<ul><li><a href="http://www.capitalaudi.com/gallery/album57">stalker page</a></li></ul>

Jamez

I made a connection on the intake-side of the turbo already, just in case.

Well I got the oildamp connected there, but gonna get a catchcan or separator. Or my hoses gonna get filled with oil...

What kind of BPV are you using?
A bosch one?
Im thinking of trying a 710N mounted the "wrong way"...? If I rip a few diaphragms Ill consider something else...

Mat Indukts Lambos

Turbo XS adjustable bpv, with about $0.10 in pennies stacked under the spring ;-)

Audi2ptzero

found the Evo motorsport valve to be much better with a very high pitch sound when I let off.

Jamez

I am running lean @ WOT and low rpm... about 16.5AFR at 3500rpm, so it pulls that much timing that boost drops. First it climbs to 1bar, then timing gets pulled so much it drops to 0.6bar... And it keeps wrong AFR all the way to the top with bad timings...
This have to be dangerous.
Well, at least exhaust gets hot this way, so probably detonation-danger...!

Also, at high rpm my problems are the other way. Running rich above 5k rpm.
Afterall, my chip is made for K03... Wouldnt expect perfect result...

So I went driving with my local tuner-guy. We are a few audi-freaks nearby, but mostly 2.2 5cyl turbo-guys, and some even worse stuff...
well, He thought I really should get it remapped. He could mapp it from scratch.
He has this emulator that he connects to the motronic and get a realtime tracing on where in the map car is, load and rpm-specific rows, and he just adds the right injection times realtime.
Then he finally burnes a chip for it.
I could make chips both for racefuel and standard if I want.
But I guess I should stay below 1.4bar boost and pumpgas too keep power below dangerous levels for my engine. Stock rods dont like 400hp++
he got visual 3D timing maps... really great equipment.
He did a car a few weeks ago. In 2-3hours they had a perfect map. (An 1.8T with K24 turbo, estimated @~280 hp)

what do you think? remap ASAP

BTW. If AFR and timings are good, he said using an atmosphere dump would be no problem at all, but he thought maybe I would get faster response with a BPV when shifting??

Well, its bedtime for me on the other side of the atlantic

Audi2ptzero

for a K03 chip that is tuned for loads from a stock maf housing.

Dumping the pressure gets you nothing but sound, just think of all that extra air your lossing that you could be making power with after you get back into it.