Several engineering enhancements were made to the Duramax diesel to meet 2007 clean diesel specifications. A variable geometry turbocharger provides continuous boost, from initial spool-up to its 120,000 rpm ceiling, with virtually no turbo lag. Consistent boost means more efficient combustion and lower emissions. Fuel delivery is metered through a redesigned high pressure (26,000 psi) common rail system featuring high precision 7-hole fuel injectors for thorough fuel atomization while a larger exhaust gas recirculation (EGR) cooler reduces NOx gases prior to the exhaust oxidation catalyst.
Read more: 2007 Chevrolet Silverado 2500HD Duramax test drive and review
Read more: 2007 Chevrolet Silverado 2500HD Duramax test drive and review