The cooler weather has revealed the cost that accompanies the simplicity of the manual boost control — it starts to peak much higher than desired. So, for $50, I purchased the Ingersoll-Rand boost control solenoid sold for Hydra by Flyin’ Miata.

As expected, install is easy as pie, but set-up is pain, although its all done from the car using the laptop. I’ve been tweaking for a couple of weeks now and I’m getting closer to a pretty nice set-up.

If you have the patience and you drive in wildly variable conditions (sub-freezing to over 30C), then this thing is for you.