Ok, I have a 2003 7.3L CC 4x4 with 6637 intake, 4 to 5 inch stright pipe, 35x12.50 tires. Egt's are fine and boost reaches 16 psi when I get on it. Transmission doesn't seem to have any issues, new fuel filter, and fresh oil change. Should my Brother's 96 ext cab stock with 33 x 12.50" tires be able to run with my truck? I seem to be lacking power. I have never heard another 7.3 with the stright pipe and it seems to be fluttery sounding (don't really know how to describe). I don't know if it runs fine or I just expect too much without a chip. The MPG seem to be fine at around 14-15 in city. Any info is appricated.

 

your expecting to much imo a chip is a big factor

 

Both trucks stock, you should pull him... Differance is tires. You have larger tires which puts you at a disadvantage. His truck is also about 1500# less then yours.

 

Thanks,

I didn't know if I should have had much of an advantage with the newer generation 7.3 . I really didn't have a clue.

 

You have bigger injectors and a smaller turbo housing. You should pull him, but your truck weighs about 1500 pounds more, and has larger tires...