ultimately you have the most detuned setup you possibly could use on that engine...So its no wonder it has no bottom end ...9901/41021 is pretty lame on a extra long stroke plus 0.9 springs and 7 mm will choke it back further............ pretty much as far as setup go you have that engine setup to have the least amount of power possible..those X-Long stroke Nova's hate the 41021, 9901 combo..it just sucks the life out of the engine....