Finally some SD4 progress. (Page 6/6) Lilchief JUN 06, 07:07 PM Didn't get the dyno sheet yet . It got 260 hp @ 6500 with 9-1 cr. Had to put bigger valve spring in. Floated the others at 7k. Builder said I can double the hp with a turbo, plus raise the rpm ,which is the future plan. Lilchief JUN 10, 08:31 PM