That is correct. Similar to what my GIAC dealer says.
Yeah in those RPM ranges it’s fine. I’m guessing because I’m outside the efficiency range of the turbo.
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I dont keep the exhaust manifold heatshield on my car, so taking the DP loose for me isn't a huge job, but, I would be very interested to see that WG flapper, the pin, etc.
I did a TON of research once I put my wagner IC on and boost went way down. Of course, the f23 was shit, and the WG was junk too...but still is the same problem with a larger IC.
Based on unis measurements of 23.5x2x16.5 = 775 ci, so the internal volume is MUCH larger than the 350 ish of stock. Tuners attempt to compensate for this by upping the WGDC, but as I've said before...mechanically it can only do what it's able.
The rule is that the WGA psi needs to be half of max boost. A 4 psi spring just isn't going to do it. Others with the s3 or stock, etc will say their boost still peaks higher, but the s3 is not a large core IC and all the turbo is doing is spinning hot air coming from a source that's already like a coffee straw vs a normal fountain soda straw, and that air is MUCH hotter than your air coming from your IC. Hot air builds pressure, cooler air is of course more dense, thus heavy, thus can blow the WG open at lesser pressure.
I really do not understand why some tuners just don't get this....really, they don't. I've asked several. Alex @ stratified is the ONLY one who has honestly said even the k04 WGA is maxed at about 22 psi with an efficient set up.
I'm not saying as an absolute that's your problem, the WG could just be failed, the n75 could be bad, etc. I would check that flapper door though. It really might save you a lot of headaches.
Do you know your WGDC as of now?