Today I installed the Stasis Streetsports with the new spring perch and set about adjusting the height of the rear of the car.
Above is where the wheel gap was at in the beginning, a random setting since the coilovers had just come back from PSI after being serviced.
Below is where I have them set now, just a little bit shy of the 13.5″ that Stasis suggests for the fender to center of the wheel distance.
And finally a picture of how the car looks at the new rear height.
My Stasis Streetsport rear coilovers came back today from being worked on.
The spring perch had been stuck and after a week of them soaking in PB B’laster and Kroil I shipped them off to PSI for the pro’s to give a try at it.
Turns out that a previous owner of the coilovers had decided to use Loctite on the threads to make sure the spring perch did not move from the height it was at. The use of Loctite was discovered after PSI was forced to cut the spring perches off.
Here’s a tip, the parts that are indicated by the yellow arrows, do not use Loctite on them. The red ring below them is for locking the perch in place.
I also figured I would give the rear shock mounts a POR-15 treatment even though they looked pretty good. Notably, the exterior of these mounts were flawless, but down inside them I did find areas that had rust.
Now the rear components are reassembled and ready to be reinstalled, with a better height setting.
Prior to installing a turbocharger on my S4 I make an effort to flow test the turbine side to see how it compares with the other turbochargers that I have tested.
For this test I run a 100 CFM calibration plate since it is the closest to where these turbo products fall out, generally around 45-55 CFM at 28″ of H2O.
After performing the bench calibration I place the turbocharger onto an adapter for transitioning to the flowbench. The compressor wheel is fixed in place, I hold it still with a finger, and then I slowly run the flow bench up to 28″ recording several data points along the way.
The chart above is a consolidation of the various turbochargers that I have tested thus far. Of note, the BorgWarner RS4 K04 has been the highest flowing turbocharger that I have tested.
The Turbo Concepts Stage 1 performed similar to the FrankenTurbo and Turbo Engineers products, as well as BorgWarner K03’s, still below where the K04’s placed.
While this is a test that I don’t put a lot of stock in to give insight into how the product will perform on the car, it is notable that the exhaust backpressure measured on the vehicle has been lowest with the BW K04’s, supporting the flow bench measurement.