OHC have the POTENTIAL to make more HP, since they have more RPM potential,
and will be more reliable at high RPM. Pushrod engines are simpler, though,
and tend to make more power at LOW RPM... everyone seems to fall into the
trap of calling low RPM power torque, but you have to look at where the
torque peak occurs... it's definately possible to make an OHC engine to make
low RPM power, but you're wasting the RPM potential of the OHC design...
Now I would generally agree with the original statement with regard to
4-valves per cylinder, but it's also to properly design one for low-end
torque as well... the new Cummins Diesel is 4-valve, and while it's torque
below 1200 RPM is less than it's 2-valve predecessor, it's still extremely
capable at low RPM.
Gary Shook
> Oh good, an engineer. Can you clarify for us how it is that pushrods
> create more power than ohc's?
> Dr. Pat
>
> ----------
> >From: SuperNagz@aol.com
>
> >. if you want a cute little high revving econo-buzz motor, buy a
> > overhead cam. If you want a real motor with gobs of power where you can
> > actually use it, buy pushrod.
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