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James
Unregistered
2/06/2001
23:18:27
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 Subject: Question
IP: Logged
Message:
Why do push rod engine usually have a higher torque rating then engines with OHC or DOHC??
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Bernd
GenIII
 
2/07/2001
08:51:32
| RE: Question
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Message:
It's the nature of the beast. I've got the technical reasons for this somewhere in my archives...i'll dig around for them.
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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James
Unregistered
2/07/2001
16:46:17
| RE: Question
IP: Logged
Message:
Thanks Bernd for your response
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Bernd
GenIII
2/07/2001
17:04:28
| RE: Question
IP: Logged
Message:
"While OHC is typically associated with smaller, higher-revving engines, this doesn't mean that OHC inherently makes better high-end power and a pushrod engine inherently works better at lower RPMs. It's entirely possible to build a SOHC for low-RPM torque and a pushrod engine for high-RPM horsepower. "
"...Incidentally, while DOHC, 4-valve-per-cylinder engines are thought of as "cutting edge" by a lot of people, they've been around essentially forever. Aviation buffs like to point out that fighter planes were using DOHC in WWII, but the engines go back even further than that. I've seen documented evidence of DOHC auto engines at least back to 1911, and Peugeot won the Indianapolis 500 in the 'teens with a DOHC motor."
http://www.acdelco.com/parts/tech/1535g.htm
http://www.acdelco.com/parts/tech/1535h.htm
or
http://www.allpar.com/eek/cams.html
That should keep you busy for a bit. ;)
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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