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What is this port used for on an RB26


73Ed

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I have a 73 240z with an RB26, ECUMaster Black ECU and SpeedHut Guages for Oil Pressure, Oil temperature. 

The ECU needs oil pressure and temperature as well, so I have 2 of each sensors. 

 

I am running the mishimimoto thermostatic oil sandwich plate/cooler which only has 1 1/8"NPT port. 

 

How or where can I install all these sensors? 

Does anyone know what this port is for, between cylinder 4 and 5 on the intake side of the 50U block? 

 

20260130_110628.jpg

Edited by 73Ed
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