I have a 07 4.6L. I plugged in my gryphon to Pegasus and downloaded my 1/4 mile tests. The results after I put in my truck weight was 252.43 at the "estimated flywheel HP" and the stock HP is 248
. I was expecting more than just a little over 4 HP gain from the Gotts mod, SI/DO exhaust and 87 performance custom tune on my gryphon. Did i do something wrong or is that the only HP gain i actually have?
