Diesel Engine Overload: Gauge Selection


Could you tell me what gauges you got from ISSPRO? Also, you note that the EGT sensor has a fitting available on the engine. What about the sensor for the turbo pressure? Is there a fitting on the engine for this? And do you need both gauges or will just the EGT do to insure no engine overload?




I installed the ISSPRO ( R609 turbocators (boost gauge and exhaust gas temp) using the following parts:

  • R609 turbocator

  • R650 thermocouple

  • R681 Brass fitting

  • R66025 leadwire (25')

  • R66030 leadwire (30')

These were easy to install.


If you have a factory exhaust mixer (some boat manufacturers use fabrications), then there is a fitting to test exhaust temp at outlet of turbo that is used in service that is exactly what you want and easy to find. On the intake side, there is a fitting on the intake manifold just ahead of the intercooler where you can get intake manifold pressure. On the 270B, turbo intake pipe connects to the intercooler via a 3 or 4" casting that adapts from a pipe to the square intercooler opening. This casting has several capped and threaded fittings any of which work fine. I used the ones in the forward side of the casting.

You could go with EGT only. But you don't save much money doing that and you give up valuable information. I would recommend both but, yes, you could use the EGT alone to watch for overload.

-- James


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