 Type 4 mechanical compression ratio, Why is the factory compression so low? |
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| 914_teener |
 Feb 15 2016, 03:21 PM
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#61
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914 Guru  Group: Members Posts: 5,197 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California  |
QUOTE(Steve Pratel @ Feb 15 2016, 12:53 PM)  (IMG:style_emoticons/default/bs.gif) (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/smoke.gif) (IMG:style_emoticons/default/yellowsleep[1].gif) |
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| ra272 |
Feb 15 2016, 03:36 PM
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#62
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Newbie Group: Members Posts: 2 Joined: 23-September 06 From: holland Member No.: 6,896 |
QUOTE(McMark @ Feb 12 2016, 07:50 AM) If you're looking to improve thermodynamic efficiency, why are we talking about compression? Why are we talking about horsepower? Neither of things have any direct connection to head cooling. You're being very cagey about what you're actually trying to do. It makes it hard to help. The raise in power from higher cr comes from a better thermodynamic efficiency. If you would measure the exhaust gas temperature the higher cr engine will have a lower exhaust gas temperature. That is we're the extra power comes from. I guess lower exhaust gas temperatures will also affect cilinder head temperature, especially in an air cooled engine. |
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| Mark Henry |
Feb 15 2016, 03:54 PM
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#63
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(ra272 @ Feb 15 2016, 04:36 PM) QUOTE(McMark @ Feb 12 2016, 07:50 AM) If you're looking to improve thermodynamic efficiency, why are we talking about compression? Why are we talking about horsepower? Neither of things have any direct connection to head cooling. You're being very cagey about what you're actually trying to do. It makes it hard to help. The raise in power from higher cr comes from a better thermodynamic efficiency. If you would measure the exhaust gas temperature the higher cr engine will have a lower exhaust gas temperature. That is we're the extra power comes from. I guess lower exhaust gas temperatures will also affect cilinder head temperature, especially in an air cooled engine. HA-HA McMark....it wasn't me! (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/happy11.gif) (IMG:style_emoticons/default/smile.gif) Oh wait.... now it is ....Doh (IMG:style_emoticons/default/slap.gif) (IMG:style_emoticons/default/screwy.gif) (IMG:style_emoticons/default/popcorn[1].gif) |
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