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post #11 of (permalink) Old 10-13-2015, 05:41 PM Thread Starter
k718cougar
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Join Date: Apr 2005
Location: So-Cal
Posts: 150
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...
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