gas engines have an instant explosive power with way higher rev range. diesels have less explosive power because the fuel we run burns so much slower than gas. with a gasser, screw it, just make it spin more rpms. but with a diesel, we cant just make it spin more rpms, my car will turn 6500 or 7k pretty easily, but it quits making power at about 5500 rpms or so. power used to drop off above about 4500 before i did the gov mod.
and another thing about the cobalt SS, they are supercharged, not turbocharged. the supercharger is making boost the second you mash on the gas. the turbo is not. thats another reason for their quickness.