DeTomaso Mailing List: January 2001, Message #3

So far from the messages I read it looks like there would be an average 2.3
intake valves open that would be sharing the available and potential 750
CFM.  750 divided by 2.3 is 326 CFM for each cylinder.  I also got some
messages that focused on RPM and indicated that a 351C with a 750 CFM carb
might be able to turn in the 7000 RPM range depending on the cam, head flow,
etc.

So if we all agree on this the next question is:

If each cylinder only uses 326 CFM on a 351C equipped with a 750 CFM carb
and might turn in the 7000 RPM range, how big would the opening (bore) need
to be in a single port on a EFI or carb system that has a individual port
for each cylinder to be equal to the 750 carb on a regular intake manifold
setup?   We know that the individual port would need to flow about 326 CFM
and that would be big CFM for a single port system.   The total single port
system CFM would be 236 CFM times 8 cylinders for 2608 CFM.  That is monster
CFM number compared to the 750 CFM carb!

This is exactly what we were trying to figure out in our OKC discussion.
How much flow does a Weber carb need to make 7000 RPM?   It looks like the
Weber bore would need to be very large to equal the good old $350 carb
system.

Mike

T  e  c  T  e  l    S  o  l  u  t  i  o  n  s
 "An Information Technology and Telecommunications Consulting Group"
 mdailey@TecTelSolutions.com            http://www.TecTelSolutions.com