Hi,
here some pics from the installation:
car prepared
engine bay before:
distance between turbo and firewall - before QSV
how a compressor housing looks, if the blow-by goes into a catch tank, instead of the air intake
Turbo out and fitting test with QSV
The port with the flap in the QSV is bigger than the usual T3 divited flange port, so that the resultant port size with open flap is more or less the same size as the stock port size. But this means, that there is likely an intereference between the flap and/or the turbo and manifold flange:
So i marked the amount that has to be removed and grind it of
I have to do the same job on the manifold flange, but there i only have to cut the edges a little bit.
As i wrote, i also dismount the wastegate and intalled a blind flange with my temperature probe instead
Here the turbo sits again, was a hard pice of work to bring in the first bolt with the three pices (turbo, qsv and gasket), at least because the turbo is a bit heavy
Because the wastegate has sit below the turbo and the actuator does also, the engine bay looks the same as before, the only difference is that the gab between the turbo and the firewall has shrunken.
Yesterday it heavily rained here, so i did not make proper test runs, but it is obvious that the midrange torque and power figures has been boosted through the QSV. The boost response is now near to the S2A / S100 turbos i have had installed before (as far as i remember). I tried to conducted a 1/4 mile run with the g-tech, but was not able to find traction in first and second gear (even with serveral throttle lifts in second), but i conducted a g-tech dyno run in third.
here are the power figures:
orange is S2A 190 hp dyno run, red is S2B dyno run, red dotted is S2B g-tech dyno run in third and blue is S2B + QSV g-tech dyno run
here are the torque figures:
Even if the peak power is nearly unchanged, it could be seen the midrange power (~3700 rpm) has increased by not less than 40 hp and midrange torque by aproximate 70 Nm.
Here you can see, that the third gear peak power is highes i have ever measured with the g-tech in third gear
which is in line with the g-measurement
But the comparement is a bit unfair, because i rev up all the way in third and therefore build up boost for a longer time, than accelerate in second and than shift (boost pause) and wait again for boost third. So we will see real comparement figures with the next dry 1/4 run.
Nevertheless i feel comfortable to state, that i think that the qsv was a good achievement.
Best Regards