Bob Marki, his son Bob and their crews exemplify âthe old school business philosophyâ in that they get the job done right, always on time and at a fair price. We have worked with the Markis many times on both large and small projects and look forward to many future projects together.
Cole Quinnell - photographer; Sometimes also called âpiston-to-headâ clearance, quench height may be defined as the distance between the flat-top portion of the piston and the cylinder head surface at top dead center (TDC), including the head gasketâs compressed thickness and any positive or negative piston deck height that may exist.
Time at heat and temperature are critical in the hardening transformation phase. Rapid cooling and tempering complete the process. Quench and Temper provides strength and uniformity of hardness through the entire part from the surface to the core. This is achieved by heating the entire part up above the transformation temperature for a set period of time. Upon quenching, parts must be tempered to the desired hardness creating a Tempered Martensitic Microstructure. Medium Carbon Steels (.25-.70C) are commonly Quench and Tempered. During this quenching process, parts are cooled rapidly thereby locking in the microstructure transformation. Oil is a very common quench medium for this process.