Single Carb

[sledge]

I have said a few times I'm gonna build a Single Carb setup for my 1100 this winter. does anyone know of a formula or anyway to figure how big or small of a Carb I need for a 1100 Goldwing motor ??? ........... I'm thinking a 2 Barrell that is ALWAYS running on both of them, not a drop in second ..... to drop in another Barrell might not be good .... say the road was wet....... :smilie_happy:

 

[slabghost]

just about any single carb sized for any similar sized car or truck motor can be made to work. BTW a two barrel transitions smooth enough you shouldn't get any surprising burst of power. Now if you push the nitrous button..... hang on!

 

[dan filipi]

Yeah Yeah, nitrous is cool!

I think the simplest carb would be either a Holley 2BBl because they have a huge selection of jets or something for a VW because they are similar in CC's. My guess is 4-600 CFM is good judging by my past experience messing with carbs, closer to 400 CFM would be better. WOT with a 600 might stumble, but then with Nitro.........

 

[joedrum]

sledge some of the vw carbs ....i forget what size ....the main jet needs to be changed to 125 i think it is .....ive also herd that the harley carbs work good too ...

as ive said before most build manifods like an H or an X looking thing to much volume .....im thinking the best way to get a good manifold thats tolerent to a wider variety carbs and running characteristics it should be made like an I .....this would be the least volume way to do it ...it might be harder to do this way but i think its the only way to go ......i also think that the heat shield would have to be remove so that the heat from the radiator would contantly heat the manifold ....

im thinking real seriously about doing this to on one of my bikes .....and yes the nitross would be easy to hook up too.....

you might want to think twice about pushing the nitros button on wet roads for sure :smilie_happy: :headscratch: :hihihi: :doh: :mrgreen:

 

[mcgovern61]

The older Suburu boxer engines are just about the same as our wings. I would think a carb and manifold from an early eighties Brat or DL would work?

 

[sledge]

thanks guys , I just thought there might be someway Intake Mfg. or Auto & Motor Cycle Mfg. decide what size Carbs to use..... I have head several Hot Rods, and Street Rods ....... like say on a 389 Pontiac of the 60's ...... some had 1 - 2 brl... some had 1 - 4 brl..... some had the Tri-Power 3 - 2 brls.... and some had 2 - 4 Brls...... and you could change the intakes and put any of them on the same motor without a Real Big Difference. ........ and NO Difference as far as starting , running, .... mostly off the line and Top End was when you could tell the difference. but anyway ........ thanks for your answers, I'm gonna be giving this a lot of thought in the new few months.

 

[Winger 82]

:cool!: but then with Nitro.........man how come I can't play with these kinda toys oh2: oh2: oh2:

 

[sledge]

Yeah ............the Nitro .......... :smilie_happy:

 

[tom foreman]

I have,a 85 1200,with a single-carb.set-up.performace,was great,gas-mileage,was-not.but the,lost gas mileage,pays for itself.the instant,throttle-response,is very good..and I chromed,the 4 into 1 manifold.and and I am.stripping.i t-down.for a custom.bobber/street-fighter-bike..i,have pictures,and video.to-follow..have a great-bike,day....

 

[Ansimp]

mcgovern61 » Thu Sep 23, 2010 11:06 am[/url]":2x74db05]
The older Suburu boxer engines are just about the same as our wings. I would think a carb and manifold from an early eighties Brat or DL would work?

I have a few of those Hitachi carbs lying around Gerry and that was my thought as well. Unfortunately here a carby rebuild kit is as much as the brand new webers that are being used. I think the weber conversion is the way to go especially if you are now using a brand new carburettor. The jetting changes and air horns means that tailoring the carby is truly possible with a lot less hassle using the webers. The other advantage as this mod is easily duplicated no matter where you are in the world.

 

[tom foreman]

I-installed a single carb.set-up.on my 85 1200.i hope to show-it..

 

[slabghost]

Ansimp » Wed Apr 30, 2014 3:48 pm[/url]":27807r3b]

mcgovern61 » Thu Sep 23, 2010 11:06 am[/url]":27807r3b]
The older Suburu boxer engines are just about the same as our wings. I would think a carb and manifold from an early eighties Brat or DL would work?

I have a few of those Hitachi carbs lying around Gerry and that was my thought as well. Unfortunately here a carby rebuild kit is as much as the brand new webers that are being used. I think the weber conversion is the way to go especially if you are now using a brand new carburettor. The jetting changes and air horns means that tailoring the carby is truly possible with a lot less hassle using the webers. The other advantage as this mod is easily duplicated no matter where you are in the world.

Have you checked RockAuto for the hitachi carb rebuild kits? They've had good prices for belts and a few other things I ordered.

 

[Ansimp]

I don't really think it is worth trying all these different carbies IMHO. I have always converted to a Weber or Holley whenever I wanted to muck around with tuning. If I am going to chandelier from the stock system I like the idea of new throttle shafts and bushes and the full tune ability of the Weber. Also by the time I want a single carby I would hope through everyone's effort at CGW I will be able to order exactly what my GW needs and just bolt it on.

 

[slabghost]

Yes I think it's pretty much there. The biggest issue I think is the different manifolds. If you use one like has been used the jetting used on that build should do fine.

 

[Ansimp]

Hopefully we will get a consensus on the best type of manifold design as well. Atm it looks like type 4 manifold with 2-1 carby adaptor and grab rails etc. I would like to see good results with something lower than the 2-1 adaptor but it seems necessary to accelerate the fuel charge from what I have read of others results.

 

[tom foreman]

heres ,the chrome-manifold..

 

[Ansimp]

Looks good and nice and low :good:

 

[brianinpa]

tom foreman » Sat May 03, 2014 11:13 pm[/url]":2nz1d3yr]
heres ,the chrome-manifold..

Who is the maker of this manifold?

 

[joedrum]

it seems to be a nice setup to a point ... the one i looked at closely had heating through middle and down two runners ...the other two didnt ... hard to tell from this pic ... the bottom is what needs to be seen .... this is just opinion but the single carbs for vw had a short fall covering the high rpm of a volks wagon motor ... i think an oldwing motor would even be worst on it ...so i have never gone there and cant say for sure at all ... but my gut feeling was i aint gambling on this ....seems a 1 to 2 transition piece might do well here and mount a dft weber on is the only way id go with it ... on a carb that will cover the high rpm once modified better than stock carbs and cover the entire rpm zone way better ... this is my opinion ...and i am not trying to debate about stock carbs verses singles... just answering ? on manifold and what i think about it

 

[tom foreman]

it was on e-bay..from California.my brother bought-it,he just passed away,saturday..so I can,t ask him..i,ll look it up.but I called the guy after.i put it on.because the gasket,he sent was -****...I had to go to napa.and get the racing gasket material..