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Classic Goldwing Technical Forums
Engine & Fuel System Modifications
Yet another single carb thread :) Dan's 1" runners from plenum to custom head flanges
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<blockquote data-quote="dan filipi" data-source="post: 98277" data-attributes="member: 54"><p>I had an idea a while back for runners.</p><p></p><p>My thought is the volume of fuel air mixture needs to be reduced so I'm going to try something.</p><p>1" runners.</p><p>I read a short thread at <a href="https://www.goldwingowners.com/forums/showthread.php?t=17530" target="_blank">Goldwingowners.com</a> where <em>jonfrabitoy</em> was calculating the air mass/volume and runner lengths of the stock rack then converting to an equal mass for the longer runners running a single center plenum.</p><p>It made sense to me so this is what I'm going to try:</p><p></p><p><img src="https://www.classicgoldwings.com/forum/gallery/image.php?album_id=2073&image_id=21153" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>This pipe is 1" EMT conduit that I've fitted to one of the harder offset runs into the VW plenum.</p><p>The pipe fits loose enough in the plenum outlets so it's fairly easy on this runner to get a straighter shot to the head intake port.</p><p>The other side (#1 cylinder) requires more of an offset still. I might have a chance in the next couple days to test fit the other runners.</p><p></p><p>What I like about this so far is I get a straight dump into the cylinder doing away with the 90 degree turn in the intake horns and leaky hard rubber boots. And it's the shortest possible runs.</p><p></p><p>The runners will be sealed at the plenum by whatever means I have at home. It may not be pretty but it will be air tight.</p><p></p><p>At the head I'll be making flanges from plywood then sealed with gas resistant silicone.</p><p></p><p><em><strong>From <a href="https://www.classicgoldwings.com/forum/viewtopic.php?p=101271#p101271" target="_blank">this thread forward</a>, I'm making permanant flanges and adaptors to the plenum.</strong></em></p></blockquote><p></p>
[QUOTE="dan filipi, post: 98277, member: 54"] I had an idea a while back for runners. My thought is the volume of fuel air mixture needs to be reduced so I'm going to try something. 1" runners. I read a short thread at [url=https://www.goldwingowners.com/forums/showthread.php?t=17530]Goldwingowners.com[/url] where [i]jonfrabitoy[/i] was calculating the air mass/volume and runner lengths of the stock rack then converting to an equal mass for the longer runners running a single center plenum. It made sense to me so this is what I'm going to try: [img]https://www.classicgoldwings.com/forum/gallery/image.php?album_id=2073&image_id=21153[/img] This pipe is 1" EMT conduit that I've fitted to one of the harder offset runs into the VW plenum. The pipe fits loose enough in the plenum outlets so it's fairly easy on this runner to get a straighter shot to the head intake port. The other side (#1 cylinder) requires more of an offset still. I might have a chance in the next couple days to test fit the other runners. What I like about this so far is I get a straight dump into the cylinder doing away with the 90 degree turn in the intake horns and leaky hard rubber boots. And it's the shortest possible runs. The runners will be sealed at the plenum by whatever means I have at home. It may not be pretty but it will be air tight. At the head I'll be making flanges from plywood then sealed with gas resistant silicone. [i][b]From [url=https://www.classicgoldwings.com/forum/viewtopic.php?p=101271#p101271]this thread forward[/url], I'm making permanant flanges and adaptors to the plenum.[/b][/i] [/QUOTE]
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Classic Goldwing Technical Forums
Engine & Fuel System Modifications
Yet another single carb thread :) Dan's 1" runners from plenum to custom head flanges
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