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So, why’d we go through all the trouble of installing a pedal box and redoing all of the brake and clutch lines? You’re looking at it. We needed to move our Turbosmart waste gates out from under the manifold and turbine housing to a cooler, more serviceable position… and serviceability makes Zombie Vampire happy.
At the same time as John Kuchta of Specialty Cars Fabrication extended the waste gate tubes, he also welded an 1/8 NPT bung to each runner. These four ports, along with an additional fitting on the down pipe, will house a total of five AEM K Type thermal couples. During runs, the four exhaust manifold runner ports will be plugged, and only the post turbine housing temps will be collected through our AEM Infinity EMS.
K type thermal couples are extremely accurate, better than 1% at full scale according to AEM. However, since they put out an extremely low voltage (we’re talking milli-volts), they need to be used in conjunction with an AEM thermal couple amplifier. The AEM thermal couple amplifier essentially takes the low voltage signal received from the K Type thermal couples, does a bunch of sophisticated mathy type stuff, and converts it to a 0-5 V analog output which is easily comprehended by an AQ-1, Infinity EMS, or other data collecting devices.
In addition to exhaust gas temperatures sensors, an AEM back pressure sensor kit was also installed by 5523 Motorsports. This is the hard line coming off of the down pipe and wrapping across the front of the head. The hard line eventually transitions into a flexible line which terminates at the back pressure sensor. The back pressure sensor itself is mounted to the firewall. The idea behind all of this is to dissipate heat and preserve sensor life.
Aside from being just another data point to collect, back pressure figures can be utilized by the AEM Infinity 8 as a part of a boost control strategy. For example, when a set back pressure limit is exceeded, the AEM Infinity 8 EMS can use its boost control function to begin dialing back the boost pressures.
5523 Motorsports is in the process of installing a slew of AEM pressure transducers along with air and liquid temperature sensors throughout the powertrain. For example, pressure sensors will be installed on the crankcase as well as within the cooling system. In addition, AEM temperature sensors will be mounted in the oil pan and the cooling system.
