Quote:
Originally Posted by Big Dave
Anybody here think the Tier II diesels are not more efficient if you lose the DPF?
All filters induce a pressure loss. That is back pressure. A diesel is very sensitive to back pressure. Back pressure is what works (non-Jacobs) diesel exhaust brakes.
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It shouldn't be a significant pressure drop unless they're improperly designed. Technically mufflers induce a pressure loss, but the trade-off is worthwhile.