Whats the difference on the those 2 systems? Which one is better and how is it better? Thanx

 

one is (multi port fuel injection). and other is (sequential electronic fuel injection)

SEFI is used on stand alone fuel managment systems and most aftermarket fuel controllers.

Even the stand alone fuel managment system that I made has SEFI. SEFI is way more efficient caseu it squirts in sepquence instead of all at once. like you can hae 2 squirts instead of 1 etc...

BTW my homemade Stand alone fuel managment is still running perfect: my big success story.