ok, this has been driving me insane the past few weeks. my car has a top end hesitation at about 5500rpm. at the track it feels like it hits a wall in 1st gear and the suspension comes right down, shift 2nd and i feel it again, but it will power through and rev to 6400, shift 3rd and it holds itself at 5500-ish...same thing on the highway, 3rd gear, 5500, doesn't want to give anymore. its not leaning out, i have a wideband 02 and the a/f is 12.2-12.4 wide open when it does it. fuel pressure is rock steady at 6psi. new plugs too. if i put the car in neutral and rev it on the highway you can hear it breaking up and feel a slight vibration like an imbalanced tire when it hits 5500. below that rpm the car is an animal. the cam is new this season, lunati recommends the same valve springs at the old cam that was in there, so its not a spring issue. junk wires mabey? 1 year old superconductors, or valve lash a little too tight? i went 1/2 turn past 0 lash cold
car specs - 355, holley aluminum heads, lunati voodoo .525/.546 241*/249*@.050, holley street dominator dual plane, hvh supersucker spacer, 650dp, msd distributer & 6AL
car specs - 355, holley aluminum heads, lunati voodoo .525/.546 241*/249*@.050, holley street dominator dual plane, hvh supersucker spacer, 650dp, msd distributer & 6AL