Posted by Bryan on Wednesday, November 28, 2001 at 7:38AM :
In Reply to: Cummins exhaust question.......gary? posted by John on Tuesday, November 27, 2001 at 10:00PM :
When you double the size of the pipe you quadruple the flow, so a 4" pipe will flow 4 times more than a 2". I also have a 98.5 cummins wiht an auto. I have 275 hp injectors, 3" exhaust with a walker straight through muffler and the resonator removed, and a boost elbow and boost module. I can make up to 31 pounds of boost where the stock setup is limited to 19 pounds before the fuel is cut off. I pulled a 81 Dodge 3/4 ton 4x4 with a salt spreader and 8' plow on a 4000# gooseneck sunday, and brand xxxx couldnt stay with me on the hills, and they were just empty pickups. This is not advertising or propaganda, just facts. If I hit the hill at 60 I topped it near 60. Go to turbodieselregister.com and check it out for more info.