I was having problems with my car not wanting to rev beyond 6550-6600 and I thought it was weak valvesprings and the type of lifters I was running. I just got done putting some Manley 150# springs and OE-R lifters in the car, and it still does the same. I have the fuel cut-off set at 7000 and the RPM threshold at 7000. Is there another field I'm missing thats preventing the engine from revving higher? The car is tuned SD in a 98 auto F-body. TIA.
-Lance