nm9stheham
Well-Known Member
I am curious as to where that graph came from, and what engine it might apply to....?? The reason I ask is that it does not strike me as correct in general, but might be so for a specific engine and setup. So, forgive me, but I just can't subscribe to the above graph as generally accurate.
Example: My 351C was solidly in the torque band from 2000 to almost 6000 RPM and had a best shift point of around 6500 RPM. That was with a cam with .050" lift duration of 192 on the intake LOL. So its actual performance did not match up at all with the above graph. The modifiers that come to mind that may have moved that engine waaay off the above graph were:
Example: My 351C was solidly in the torque band from 2000 to almost 6000 RPM and had a best shift point of around 6500 RPM. That was with a cam with .050" lift duration of 192 on the intake LOL. So its actual performance did not match up at all with the above graph. The modifiers that come to mind that may have moved that engine waaay off the above graph were:
- The very good 351C intake ports
- 1-7/8" headers with 18" collectors
- A gen 1 Torker single plane manifold
- Long cam ramps from .050" to .006" lift at the lifter
- The 351's 1.73 stock rocker ratio (a lot more lift versus duration compared to a 1.5 rocker ratio)
- 10.3 SCR and 8.3 DCR
- All on a 600 cfm carb
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