Quote:
Originally Posted by 8cd03gro
I'm just adding to your statement here - OHC is just more efficient. If you have the same displacement in an OHC engine you will make more power and torque than the OHV. You will always make more HP than TQ above 5252 RPM, that's just math. HP = (TQxRPM)/5252 The higher you rev, the larger that gap becomes.
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Not necessarily. Example: Ford's 5.4L (OHC, 3-valve) engine makes less power than GM's 5.3L (OHV, 2-valve).
The 5.4L makes more low-torque, which shows that OHC and multi-valve doesn't necessarily have to be biased for high RPM power. A lot has to do with the intake, design of the heads, etc....The OHC design of the new Ford engines hasn't forced them to have peaky engines, they chose that because the lofty high RPM numbers sound good in an ad.