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Classic Goldwing Technical Forums
General Classic Goldwing Technical Forum
Gl1200 cam differences- didn't know there was
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<blockquote data-quote="ekvh" data-source="post: 186477" data-attributes="member: 1179"><p>Sales pitch? I've heard your perpetual sales pitch, Joe. Glad you feel that way. I'm just presenting facts as can be known. Just sit back and watch if you like. I really don't think you're reading what's being said. </p><p></p><p>The valve curtain area ( the area around the valve that is open and through which all gas must flow ) if you go by the cam info only is</p><p></p><p>36mm intake v x Pi x 5.8 mm 1200 cam lobe = 656 mm sq</p><p></p><p>36 mm intake v x pi x 7.08mm cam lobe of 77 = 823 mm sq</p><p></p><p>38mm intake v x pi x 7.08mm 77 cam lobe = 845 mm sq</p><p></p><p>The differences between what people think are the 1200 values are hugely different than I think it could be. If this were true, I don't care how much faster that charge is, there's no way it will flow near what the 1000 heads flow. 25% is just too much to made for by anything except a blower. I could be wrong, but the 1200 heads had to have more lift. </p><p>I need to find out how much actual valve lift there is on a 75-77 head and on a 1200 head. </p><p></p><p>Nothing in this thread about carbs. Everything affects everything, but I'm trying to focus on cams in this thread.</p></blockquote><p></p>
[QUOTE="ekvh, post: 186477, member: 1179"] Sales pitch? I've heard your perpetual sales pitch, Joe. Glad you feel that way. I'm just presenting facts as can be known. Just sit back and watch if you like. I really don't think you're reading what's being said. The valve curtain area ( the area around the valve that is open and through which all gas must flow ) if you go by the cam info only is 36mm intake v x Pi x 5.8 mm 1200 cam lobe = 656 mm sq 36 mm intake v x pi x 7.08mm cam lobe of 77 = 823 mm sq 38mm intake v x pi x 7.08mm 77 cam lobe = 845 mm sq The differences between what people think are the 1200 values are hugely different than I think it could be. If this were true, I don't care how much faster that charge is, there's no way it will flow near what the 1000 heads flow. 25% is just too much to made for by anything except a blower. I could be wrong, but the 1200 heads had to have more lift. I need to find out how much actual valve lift there is on a 75-77 head and on a 1200 head. Nothing in this thread about carbs. Everything affects everything, but I'm trying to focus on cams in this thread. [/QUOTE]
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Classic Goldwing Technical Forums
General Classic Goldwing Technical Forum
Gl1200 cam differences- didn't know there was
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