Quote:
Originally Posted by Enabled
In a very general sense:
Gasoline engines are air throttled (meaning that the amount of air ingested determines how much fuel will get injected and therefore how much the engine is energized). Gasoline cars must stick to a very narrow air to fuel ratio (AFR) or else the engine runs poorly or unsafely.
Diesels are fuel throttled. Diesels do not adjust fueling up when there is more air. Diesels often run extremely lean, such as 100:1 AFR at idle without any issues. Generally, ramming more air than necessary into a diesel does nothing.
For diesels, adding intakes and other stuff is more often a waste of time when considering power.
For example:
Let's say your diesel engine is ingesting almost 100% air (it always is, there is no throttle body), and it's fueling at 40mg per stroke at that max accel pedal level. You will make the power for 40 mg of fuel.
Then you find the most advanced, best intake and you can now breathe a few % more. The car will still fuel 40mg / stroke of fuel. The effect? Nothing.
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Thanks for that concise explanation. Alright, so Stage 1 remap it is plus the exhaust to go with the kits.