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Portal » Forums » Repairs and Modifications » Goldwing Customizing » Single carb and other custom fuel delivery Mod's

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 Post subject: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#1  Unread postPosted: 2021-04-24- 10:53

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Now that I am done with chemo (4 yrs worth) I want to get the Wing straightened out. I've had the carbs rebuilt the last two years and they never have ran good since. I went thru them this winter and double checked floats, etc, but would sync good but never run right at the high end. So entering the SC world.

So far, I've gotten the exact carb that Dan got and the VW center mount manifold. I do have a question, probably one of many down this road :) .
So the bottom of our existing manifold elbows are right around 1.3 inches. Has anyone tried using runners that same diameter?

Schedule 80 SS pipe is the same ID and the OD will fit the existing rubber boots. Just curious on thoughts.

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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#2  Unread postPosted: 2021-04-24- 12:42

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No but,congrats on being done with chemo.hope the big C stays away

Sent from my LM-X420 using Tapatalk

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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#3  Unread postPosted: 2021-04-24- 14:49

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No but,congrats on being done with chemo.hope the big C stays away

Sent from my LM-X420 using Tapatalk


Thanks DD!

I was doing some reading today and it appears a 1" pinch point close to the carb is recommended. With the EMPI manifold it has a clean ID bored in it approix. .70" deep and around 1.45" ID. Thinking of having a machinist friend turn me (4) inserts for this spot that taper to the 1" dia. opening. Then using the schedule 80 SS pipe with an ID of 1.3" would hold the inserts in place and hook up to the existing elbows. We will see. :)

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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#4  Unread postPosted: 2021-04-24- 15:23

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Hi and congrats ...I can't remember all the numbers but I think the VW carb mount is 1 1/4 "ID .. I USED 1 1/2" OD stainless steel grab bars as my runners with 1 1/2" radiator hose as connectors ....to VW CARB MOUNT ...I used 2 18" grabars from home depot for runners ...I've ran my set up both ways necked down to one barrel size and on VW CARB MOUNT ..I use just the VW Carb mount ..MY BIKE. Is way from stock set up in the motor and ignition but it runs extremely fast ...been set up this way long time ..good luck with yours ...

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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#5  Unread postPosted: 2021-04-25- 6:08

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Hi and congrats ...I can't remember all the numbers but I think the VW carb mount is 1 1/4 "ID .. I USED 1 1/2" OD stainless steel grab bars as my runners with 1 1/2" radiator hose as connectors ....to VW CARB MOUNT ...I used 2 18" grabars from home depot for runners ...I've ran my set up both ways necked down to one barrel size and on VW CARB MOUNT ..I use just the VW Carb mount ..MY BIKE. Is way from stock set up in the motor and ignition but it runs extremely fast ...been set up this way long time ..good luck with yours ...


Thanks Joe!
I saw on one post that you left the anti-diesel solenoid on, am I correct? I could see where that might be useful.
Also as I start to plug carb holes, what is your favorite epoxy to use that is fuel resistant?

Thanks,
Greg

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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#6  Unread postPosted: 2021-04-25- 6:21

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I am going to try to remember to document as much as I can.

The offending unit:
Attachment:
IMG_20210425_100031371.jpg


The Wing looks a little bare :)
Attachment:
IMG_20210425_100049849.jpg

Attachment:
IMG_20210425_100058671.jpg

Attachment:
IMG_20210425_100114081.jpg
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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#7  Unread postPosted: 2021-04-25- 6:28

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Now that the carb holes are opened up, time to study what is not needed and can come off or gets plugged:
Got some work to do :)
Attachment:
IMG_20210424_143009877.jpg

Attachment:
IMG_20210424_143023239.jpg

Attachment:
IMG_20210424_143047648.jpg

Attachment:
IMG_20210424_143054655.jpg

Attachment:
IMG_20210424_180032313.jpg

Attachment:
IMG_20210424_180044384.jpg

Attachment:
IMG_20210424_180054078.jpg

Attachment:
IMG_20210424_180101444.jpg
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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#8  Unread postPosted: 2021-04-25- 9:46

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After doing some measuring:
Attachment:
IMG_20210425_130701867.jpg

Attachment:
IMG_20210425_130710873.jpg

Attachment:
IMG_20210425_130737505.jpg


I am thinking that some metal chokes like this, will insert into the intake manifold. Since the pipe I want to use is 1.3" ID it should hold the insert in. Sort of like this:
Attachment:
Manifold choke.jpg


Then seal the joints with 1.5" Radiator hose pcs.
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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#9  Unread postPosted: 2021-04-26- 11:00

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On the old carbs witch mine was the anti Riesling device really did cut off fuel flow witch is a good thing cause it had a rubber pointed stopper that really shut the gas off ..the newer carbs have some BS METAL THING ...that doesn't shut it off good ...the deal is the idle off idle cirquit will siphon the gas bowl down to the idle Circuit pull.level about 1/2 full bowl ...I use a electric fuel pump that switched and let run till it dies on turn off ...in my many moments of crazy I screwed up my old school cut off valve and have never seen another one like it ..I say the one you got is of last production and won't stop bleed down ...there are many tricks that need to be done on my bike to get this carb to work ...but I'm no expert on setting one up on stock motor lol....the deal is to get these EPA carbs more like a strait carb and completely adjustable ...the biggest problem for me was the idle cirquit being to much and it's combined to the off idle Circuit ...the non adjustable power valve ....the secondary throttle plate adjustment ...and throttle plates adjusted on there shafts ...on my bike I can't see any other type carb operation that works better than these carbs ...but it sure takes getting to know them and nodding them to work ...I've never come across a oldwing that I'm worried about that includes supercharge ones...as I've said many times I am the weakest link on the bike

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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#10  Unread postPosted: 2021-04-26- 11:02

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As far as chokes go I tried them ..actually going bigger on the runners proved best forme but again my motor far from stock

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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#11  Unread postPosted: 2021-04-27- 8:48

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Thanks Joe for the info!
My guy is making the chokes this week. The cool thing is they just slide in, so if I don't like them, he can turn them down again so the make a smooth transition form the plenum to my runners.

Making progress last night stripping the carb. The choke housing is off, the vent valve is off and the various vacuum connection are pulled. Going to pick up some epoxy tonight.

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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#12  Unread postPosted: 2021-04-27- 17:27

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Epoxy. Sticks are good stuff ....

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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#13  Unread postPosted: 2021-05-08- 14:35

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So finally got time to make a little progress on the SC.
I ordered the right size plugs for the idle fuel shut-off solenoid hole, the fuel bowl vent solenoid hole, vent pipe holes.
FYI: If you plug them and epoxy the holes you will need the following:
(1) Set Screw 10MM X 1.00X 8
(1) Set Screw 8MM X 1.00X 5
(1) Set Screw 12mm X1.00 X 8

I ordered mine online from BelMetric.com and had them in a few days. Used JB Weld on the treads before inserting. I tested and you can remove them if ever needed.
Attachment:
Carb Plugs.jpg

Attachment:
Carb Plugs 2.jpg
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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#14  Unread postPosted: 2021-05-08- 14:45

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I also got my chokes. They really are not what has been called chokes in the past. These are black nylon. Inside each of the Empi Manifold ports they are machined to a larger diameter. These pcs match the Empi Manifold ID before the machining and match the ID of the stainless pipe I am using for a smooth transfer of air.

EMPI Manifold view inside the ports:
Attachment:
EMPI Manifold Ports.jpg


Inserts (Chokes) Side View
Attachment:
Inserts1.jpg


Inserts (Inside Manifold Side)
Attachment:
Inserts2.jpg


Inserts (Side to the Pipe Runner)
Attachment:
Inserts3.jpg
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 Post subject: Re: Going SC
Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#15  Unread postPosted: 2021-05-08- 14:51

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Here is the Stainless Schedule 80 Pipe I am using. Fits the factory elbows perfectly and matches up to the manifold well also:

Pipe:
Attachment:
SS 80 Pipe.jpg


Starting Mock-up; :)
Attachment:
Starting.jpg


Attachment:
Starting2.jpg
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