Gary’s brand new 05 F7/ F8 EFI is way low on torque/ HP. With new DD
twins it pretty much maxed out at 109 LB/FT and 166 HP at 12/1 A/F
ratio. Aiflow CFM is fine, crank has not twisted out of phase. Thinking
maybe the pipes were off the mark we installed Gary’s stock pipe/
muffler, at about 11/1 A/F ratio it makes 96 LB/FT and 141 HP.
This AM, we’re checking compression to make sure they didn’t goof and
put F10 conbustion chambers on it, then if that’s OK we’re hoping that
the 3 degree keyway is installed backwards.
If we find the missing 10 LB/Ft of torque, we’ll tune the sled with the stock pipe, then maybe rerun the twin pipes on Monday.