Hello,
I currently have a 2004 Ram 1500 with the 5.7 Hemi. I recently rebuilt the engine using all forged parts, crank / rods / pistons. The compression ratio is basically stock as the rebuilt was in preparation for a Procharger and that's the suggestion I received from them. Fast foreword a bit, I had the supercharger on the truck for about a year - I started out at 6psi and eventually ended up with 12 psi from multiple pulley swaps. No tuning issues at all..
Long story short, "I" was personally disappointed in the performance of the setup mostly because the max boost was only present at redline. Another reason I was disappointed was because of the drivability - essentially once the bypass valve closed the truck would start to accelerate and then I would ultimately have to let off the gas almost 100% to slow down / open bypass valve (on the freeway). This cycle would repeat over and over again and anyone riding with me would think I didn't know how to drive. Accel / Decel and nothing in between.
My question is fairly general and not related to tuning.
Is there a pump type supercharger (NO centrifugal) that can fit on this engine in this truck even if it means making some custom parts. I have been looking on and off for around a year for a solution but unfortunately the positive displacement superchargers only seem to be available for the newer (2009?) engines.
Thanks for reading
Mark Norris
Any suggestions would be very much appreciated.