Lots (not lost) of boost from an RS2 turbo

[Kenneth]

So I replaced my WGFV / N75 valve ("J" version) on my 200q20v last night.  I ordered one from Autohausaz and instead of having EATON stamped on it, I was surprised to find it was stamped with a VW symbol and Audi rings. I thought aftermarket parts are commonly scrubbed of auto maker markings if they are not purchased directly from the dealer.

Anyway, now my boost is consistently extra large.  The N75 valve I had most recently ran wouldn't add any boost most of the time (except when cold or other times) and had a high resistance value of like 322 ohms instead of the 30-ish it was supposed to have.  I also couldn't get it to actuate by directly giving it 12v.

By extra large boost, I mean to say that my boost comes on and peaks to like 28psi and seems to hold around 22+psi.  It's hard to say exactly for two reasons.  One is that I don't know if my setup is dialed in right and I don't want to blow it up or break anything, and another is because I don't want to get a speeding ticket.

I have a 1.8bar WG spring in right now, and I plan to swap in the standard one now that my N75 valve is working.  At some point I want to install a wideband O2 sensor to see how my AFRs are.

My setup is RS2 EM/turbo, 7A cams (both), Iroz Motorsport downpipe, and Stromung.  My injectors are from Racetronix and I don't remember whether they were 37lb/hr or 38/lb/hr.  My ECU has a 3.0bar Bosch PT in it and the chipset was configured with my hardware in mind at the time, but was not mapped with my specific car/fuel/altitude/etc.  This was many years ago but I'm only just now getting everything assembled in a car and actually using it, so I've forgotten some of the details.

Among the many things I want to do to the car, I want to relay my fuel pump.

I've started to look online to see what are the highest boost levels that I can be running to maximize the use of my RS2 turbo without damaging it, as well as things like my motor's bottom end.  Off the car and not yet installed, I have some Glyco/RS2 rod bearings and Scat type forged rods, but I was expecting to use them on another project.  I would/will put them in this car if the rest of my setup suggests it's needed.

This is the first time I think I've had a car that is as fast as it is / has the potential to go fast.  The potential downside is that after all the money spent over the years on the mods, I'm faced with the prospect of a bunch more things being needed next partly due to the mods so far but also due to the age of the car, such as engine/tranny/diff mounts and the clutch.  I noticed the clutch slipping on at least one occasion when the boost hit in fifth gear (although I think I may have been overboosting even more than I described, with the old N75 valve), and on another occasion when the boost came on hard I heard and felt a brief clunk and rubbing sound which could have been related to the diff or driveshaft or exhaust.

There's a ton of stuff that the car needs, but I think feeling the fun factor of what it can now do will be motivating to me to get going on those thing than the idea of "what it could be" has been in the past.

My plan for the 200q20v is replace my 2006 Ridgeline for daily driving.  My Ridgeline only gets like 15mpg at the most and it's not as stimulating as the Audi is (which as y'all know is an adjective that can be positive or negative, depending).

Kenneth