I'm having a bad lean spot at 4k that i cant seem to fix by any way i kick,flip,or spin it, put a little bandied on it for now but it's still not right. i had Fic 2150s and the lean spot was at 3000 RPMs with a haltech pro ecu then i put the stock ecu back in and still had the lean spot at 3000 RPMs bought brand new FiC 1650s now my lean spots at 4k with the stock ecu. My setup gtx3582 turbo buschur racing 272cam evo 9 with an evo 8 head, Evo 9 ecu on SD with a omnipower 4 bar map sensor, Buschur racing fuel rail,Fuelab fuel pressure regulator, 2 walbro 255 pumps secondary fuel pump setup with a 16 psi hobbs switch. Idk if i'm doing something wrong or its just the evo 8 head on a evo 9 ecu making this happen i add my rom if you guys can take a look at it a see if anything jumps out at you.