kerslaks
New Member
I have recently noticed a difference in Manifold Temperature and Boost Pressure on my boat.
I have QSB5.9 380s on a Sea Ray Sundancer 390.
The SmartCraft indicates no other differences but the fuel burn is higher on the cooler engine. That seems odd to me.
I burn .5gph more on port, but the manifold temperature is 30 degrees cooler than it is on the stbd. (Port is 100, stbd is 130 at 2600RPM)
Does anyone know:
- what the nominal temperature is?
- why would the engine with the higher temp burn less fuel?
The port aftercooler has been cleaned, not the stbd. If I clean the stbd aftercooler, should I expect an increase in fuel consumption?
I have QSB5.9 380s on a Sea Ray Sundancer 390.
The SmartCraft indicates no other differences but the fuel burn is higher on the cooler engine. That seems odd to me.
I burn .5gph more on port, but the manifold temperature is 30 degrees cooler than it is on the stbd. (Port is 100, stbd is 130 at 2600RPM)
Does anyone know:
- what the nominal temperature is?
- why would the engine with the higher temp burn less fuel?
The port aftercooler has been cleaned, not the stbd. If I clean the stbd aftercooler, should I expect an increase in fuel consumption?