Re: <tech> DOHC vs. SOHC

[AWE16VR6@xxxxxxx]

<< From: Christopher Pawlowicz <chrisp@domain.elided>
 Subject: <tech> DOHC vs. SOHC
 
 KC asks
 >What's the advantage of having two cams versus one?  I can see an
 >advantage with VANOS on one or both (more leeway for adjustment).  Is
 >there anything else that two cams do better than one?
 >
 
 don't you *have* to have 2 cams to work a multi valve engine ?
 
 if you have 2 valves per cylinder they can be side by side (in the same
 direction as cylinders) and 1 cam can operate both valves..
 
 but if you want 3 or 4 (or more?) valves per cylinder you have 
 a cluster of 4, and 2 can be operated from one side, but the other
 two have to be operated from the other side of the bank of cylinders
 which means another cam
 
 is there such a thing as a sohc multivalve engine ?
 
 
 chris pawlowicz
 '89 325i
 '74 2002 >>

Most, if not all, Honda 16V engines are SOHC.  The central (to the head) cam
runs the offset valves via rocker arms.  The followers are *still* solid, if
I'm correct.  Not that I spend much time under the hoods of these cars.  I'm
6'5" with correspondingly large hands.  Japanese cars are made to be serviced
by petite 2 year olds.

Todd
Air & Water
Foreign Auto Service 
Philadelphia

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