I read in Four Wheeler Magazine that the times on a Duramax from 0-60 was 9.6 seconds, & the 0-60 times on an identical truck (the Duramax was Chevy & the 8.1L was GMC) with the big block was 11.4 seconds.
Those tests were done on 2001 trucks.
The only category the Big Block beats the Duramax is from 0-30MPH, & it is still not very much.
Duramax Beats it in the Quarter Mile, 0-60MPH & 50-70MPH acceleration.
GS
2003 Chevy 2500HD Crew Cab Long Box DURAMAX/ALLISON:<br />Line-X Bedliner, Curt Pop-up Gooseneck ball, bug shield, Mapp Stainless Steel running boards.<br />2001 Polaris Sportsman 500 High Output with K&N Filtercharger.<br />Merceded 300D I-5 Turbo Diesel (best diesel ever manufactured IMHO)