Re: 393W not running up to expectations
The heads were not "worked" but cleaned up and the exhaust was polished to a mirror finish. These heads when on the 351W went 12.09 @ 109, but did rev higher (6700). Again, everything was the same with the exception of the CID.
60' - 1.683
330 - 4.833
1/8 - 7.497
1/8 MPH - 91.59
1000' - 9.817
1/4 - 11.790
MPH - 114
On the return trip home from the track, I realized I forgot to bring a vacuum gauge to check top-end vacuum pull.
It runs well, it seems like it doesn't have the pull that it should.
Racing Cougars (the other Mustang), for four decades...