Re: Did Chevy consider Packard V8 BB Design?

Posted by Jack Vines On 2008/10/10 11:24:01

Hi, Craig,

Interesting stuff. As you know, the DynoSim program depends upon assumptions. Help me understand the underlying logic here:

1. Just wondering why the choice of making everything the same, but not OEM equipment? Once we depart from OEM, then we could "improve" the Packard with a more intense acceleration cam profile and so on.
2. Where did you find the head air flow data? I've never seen anything published for the Packard V8. Were you using 290 horsepower as the goal for the 374" and then letting the program reverse-engineer the flow? Without real head flow data, I've found everything else is a guess.
3. Why choose a 600 CFM carburetor, rather than the OEM?
4. Why choose 9.5 C.R.?
5. Why not compare the 352" @ 9.5 C.R. against the 348" and the 374" @ 10.0 C.R. against the 396". On the 352", the 2" valves become proportionately larger.

Again, interesting stuff.

thnx, jack vines