We have been able to compile our initial flow testing on our Steam STX 71 turbocharger, and we have to admit, our expectations have been exceeded. We didn’t expect the STX 71 design to out flow the Garrett GTX3071R, but that is just what happened. It turns out the original STX 71 design was actually quite good from the get go. Don’t worry. This testing is just a baseline. We intend to make it even better.
Just as a refresher, this is what the compressor map lines mean.
Here is the Steam STX 71’s compressor map. As yo can see, it has a max flow of a whopping 59.5 lbs/min.
How does the Steam STX 71 compare to the Garrett GTX3071R? See for your self. The STX 71 actually out flows the GTX3071R by at least a few lbs/min.
Here is the turbine section map for our Steam STX 71 turbocharger in our version Subaru WRX STI single scroll turbine housing. It is mildly ported and 8 cm^2 in Mitsubishi speak or 0.55 A/R in Garrett speak. The both measure the “size” of the scroll. Bigger means the housing can flow more generally speaking.
How does our Subaru turbine housing flow compared to the Garrett T3 housing for a GT30 turbo? It actually flows quite well for being “smaller” than a 0.63 A/R T3 housing. We attribute this to our signature 9-blade high flow turbine design.