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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: 101888" data-attributes="member: 54"><p>You betchya!!</p><p></p><p>Joe and I talked on the phone quite a bit and did some jet tweaks so I'm posting 3 ride reports below:</p><p></p><p><strong>First ride, no changes in jets or otherwise;</strong></p><p></p><p>No bogging on take off.</p><p></p><p>Cruise was a bit "surging".</p><p></p><p>Wide open throttle, good power up til 6500-7000 rpm then it would loose power.</p><p>Could not get it to recover above that no matter what. </p><p>If I let back on the throttle, it would recover. Repeatedly after trying several times.</p><p>It felt like fuel pump wasn't keeping up with demand.</p><p></p><p>I was wrong.</p><p></p><p>I swapped over the entire jet tube from primary to secondary.</p><p></p><p><strong>Second ride;</strong></p><p></p><p>Take off bogged very bad but once secondary opened it took off to almost pulling me off the grips.</p><p>Acceleration would keep going well past 8000 if I let it.</p><p></p><p>Jet mod:</p><p></p><p>1. Filled and drilled the primary air jet to 1.60 mm. is <strong>was</strong> 1.75.</p><p>2. Moved the 1.75 to the secondary well tube. It <strong>was</strong> 210.</p><p></p><p><strong>Third ride;</strong></p><p></p><p>Takeoff is a real good, no bogging.</p><p>Mid power feels a bit lean. I feel a tiny bit of surging.</p><p>Secondary power is all there, up to and past redline.</p><p></p><p>It's very rideable right now. I could leave it as is but I'm going to order an air filter and mount then see how it does. Air filter restriction may add a bit more gas to get rid of that bit of surging.</p><p>If not then I'll experiment more with jet sizes. I want it <em>just enough</em> gas in the mix for smooth power and mpg.</p><p></p><p><strong>I need to give Joe a lot of credit here for all the studying and analyzing he's done of these jets and the carbs.</strong></p><p><strong>If not for him I would have done differently and been wrong.</strong></p><p><strong>Thanks Joe.</strong></p><p></p><p>Now, for what I've experienced in this build trying different things and reading/talking to Joe about problems others are having......</p><p></p><p>First, runner size.</p><p>1" IS big enough to supply plenty of mix to an 1100 engine.</p><p>No "chokes" or venturi's in the tubes needed.</p><p>"Possibly" 1-1/4" would be OK also, I don't know. I would have to try it myself to see what improvements (or not) there are if any. Jungo seems to be happy with his at 1-1/4" no chokes.</p><p></p><p>Finally, <strong>there are without a doubt, more than one way to build a single carb setup!</strong></p><p></p><p>My next ride report on this build will be after a duplicate ride from my last to check mpg.</p></blockquote><p></p>
[QUOTE="dan filipi, post: 101888, member: 54"] You betchya!! Joe and I talked on the phone quite a bit and did some jet tweaks so I'm posting 3 ride reports below: [b]First ride, no changes in jets or otherwise;[/b] No bogging on take off. Cruise was a bit "surging". Wide open throttle, good power up til 6500-7000 rpm then it would loose power. Could not get it to recover above that no matter what. If I let back on the throttle, it would recover. Repeatedly after trying several times. It felt like fuel pump wasn't keeping up with demand. I was wrong. I swapped over the entire jet tube from primary to secondary. [b]Second ride;[/b] Take off bogged very bad but once secondary opened it took off to almost pulling me off the grips. Acceleration would keep going well past 8000 if I let it. Jet mod: 1. Filled and drilled the primary air jet to 1.60 mm. is [b]was[/b] 1.75. 2. Moved the 1.75 to the secondary well tube. It [b]was[/b] 210. [b]Third ride;[/b] Takeoff is a real good, no bogging. Mid power feels a bit lean. I feel a tiny bit of surging. Secondary power is all there, up to and past redline. It's very rideable right now. I could leave it as is but I'm going to order an air filter and mount then see how it does. Air filter restriction may add a bit more gas to get rid of that bit of surging. If not then I'll experiment more with jet sizes. I want it [i]just enough[/i] gas in the mix for smooth power and mpg. [b]I need to give Joe a lot of credit here for all the studying and analyzing he's done of these jets and the carbs. If not for him I would have done differently and been wrong. Thanks Joe.[/b] Now, for what I've experienced in this build trying different things and reading/talking to Joe about problems others are having...... First, runner size. 1" IS big enough to supply plenty of mix to an 1100 engine. No "chokes" or venturi's in the tubes needed. "Possibly" 1-1/4" would be OK also, I don't know. I would have to try it myself to see what improvements (or not) there are if any. Jungo seems to be happy with his at 1-1/4" no chokes. Finally, [b]there are without a doubt, more than one way to build a single carb setup![/b] My next ride report on this build will be after a duplicate ride from my last to check mpg. [/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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