Originally Posted by JjCoDeX75
Originally Posted by Chip-3Door
BSFC actually varies even based on different RPM points and different amounts of boost.
Its not just one fixed number that applies, its an entire graph.
Typically most changes will make it better in some places and worse in others.
Hi matey - I thought you were going to bed
Right - yes that makes sense. Given that very very little (if anything) is linear in engine design, why should BSFC be different.
Even so, if the BSFC accounts for the different amount of fuel required to create power, if we substantially change the specification of the engine as above, why is the BSFC effectively not requiring alteration of the fuelling pressure etc?
JJ
The fuelling on the engine is largely linked to the airflow, within 20% or so even comparing between full boost and cruise.
The BSFC though can vary greatly, but only typically if you get things badly wrong with the spec.
Any time you see massive heat its normally an indication you just wrecked your BSFC!