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Just reading up on G25 stuff. One thing that crossed my mind when looking at dyno chart numbers: Where is the 'loss factor' coming from in for example 350 HP wheel become 409 BHP (or 16% loss). I used to 22% percent loss on Quattro 1.8T used to calculate BHP from wheel HP/TQ.

Any chance to fix the photo links?

Thanks! I will check them out and see if they provide more insight.

Parts involved:

I have been looking for DIY help, instructions etc for removal/installation of the exterior door handle (front right door, 2006 Audi A6, keyless entry feature), but haven't found anything. I somehow (aimless trial and error) managed to get the handle off. I have no been trying get in back on...

Would like to do the same, but not sure if solution has been found. In my case: RS6 steering wheel (yet to be obtained, but for example 8B0 419 091 CJ mit Airbag 8E0 880 201 S from a March 2003 RS6) into 2001 Allroad Tiptronic (with steering wheel shift buttons).

Just to those looking into KKK/BW style turbos: we are manufacturing custom turbos (including billet comp wheels). From K03 to the largest that can still be fit on stock application (1.8T, 2.7T). Here is for example a log of a B6 1.8T with our TM5+ billet turbo (note: 22 psi stock map limit...

With key on, i don't have +12V on the ignition coil connectors (pin "15"). Schematic says "ro/gn" (red/green), getting 12V from "D23 - Connector over fuse 229 in wiring harness front, right" (for right bank). Where is the D23 connector? Where is fuse 229?

270 g/s here, on N75 at about 22 psi (stock MAP sensor limit) steady. Try to get a bit more (280) but not sure if it can be done using N75 and stock MAP. Would like to keep the N75 control. BTW: has anybody written maps yet for the available higher pressure MAP sensors for the 1.8T?

Not in my case, the diameter of the shock is MUCH bigger (several mm) than the ID of the B5 purch (see photos with measurements). Do I have 'non standard' sport shocks

To correct the awkward look (front higher than rear), I followed the suggestion posted here and everywhere and ordered the B5 perch. Took the struts out (I had my 3 day fight with the pinch bolt a half year ago already, ended with taking the entire uprights off and drilled out the remnants of...

Does anyone have the dimensions of the Loba "2580" wheel? http://www.loba-motorsport.com/shop/media/image/thumbnail/01-vag27t-lo750-07513b56020db69_720x600.jpg Looks to me like a 2283 6-blade? Just curious.

badger: thanks for the insight. Very interesting. Is boost a factor? RPM (since even healthy new stock springs will float at some RPM (even without combustion, just mechanics from a 'swinger system')? Valve float occurring at higher RPM? When measuring (who has logs?) back pressure, what are...

==> what is a high mileage stock K03 with cat running (for comparison). I have plug in the manifold: what gauge is used to measure the pressure? ==> boost spikes: i try to wrap my head around why valve lift would cause spikes: extra exhaust gas from valve lift spool turbine, pumping more air...

Numbers for backpressure floating around out there are up to 60 psi on K04. Realistic? What is stock backpressure (K03, stock manifold, cat)? Can high back pressure cause valve lift? With respect to valves: is the stock valvetrain of the 1.8T good for 350-400 cHP (7200 or less rpm)?

What pressure are we talking about? Say 3" DP, not cats, cat back exhaust after the turbo, Say high flow log manifold from cyl to turbo.

Will check with tuner. But what EBC 'comes to mind' for this purpose?

Any suspicion yet for the boost dropping from 5500 on? N75 with MBC in parallel, stiffer actuator spring, correct? Since I have similar issue (overboost mid range or falling boost, depending on perspective), a strong springed actuator was suggested here. IIRC, you put a stronger (borrowed from...

"if I go over 21 psi below 4250 rpm the thing will surge": How does 'surge' materialize (in data, and real world)? I don't seem to have the limit, running happily at 25 psi (RS6/2283) (needed to get the desired 21 psi at redline due to "overshoot", but NOT liked since I am on stock rods (and 25...

I thought I need stiffer wastegate spring? "2:1 pressure ratio": what is 2 and what is 1? Cylinder pressure 2, exhaust pressure 1? In absolute numbers (examples) available?