From what i understand the tunes with no timing added are meant to be ran with an additional timing box. You definetly will not see the same power numbers as the tunes with timing.

Thats what i figured. Thanks for the input.

I was also wondering what kind of low side fuel pressure you guys are running. There doesn't seem to be any info out there about this. How much is too much? Thanks

I have a 2003 cummins HO 6 speed. 5" exhaust, Banks intake, gauges, predator and puck stacked. Yesterday I ran the Rkl puff stack tune and had no problems except my low side fuel pressure would drop to nothing. Today i installed a lift pump system using a Aeroquip SS pump. My low side pressure is ...