Good point, WT. I knew the boost would be somewhat curvilinear, but I was expecting a flatter curve. When I install the fitting for the intercooler IN temp sensor, I'll also place a fitting to measure the boost pre-intercooler. BTW, thanks for the tip on the SPA gauges... I'll be installing their very cool "Intercooler In-Out Temp" gauge. We shot the SC housing with the IR gun while dyno tuning, but I didn't write down the reading, and have forgotten... will record next time.