Author Topic: Blasphemy! Single carb on ZG1000?  (Read 1128 times)

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Offline johnnyfingers

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Blasphemy! Single carb on ZG1000?
« on: October 03, 2017, 04:52:40 pm »
I know!
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go grab a towel and mop up the coffee you just spit out all over your electronic device of choice when you read my title!!

Just cruising up the interstate the other day and, as the mind is free to wander, I wondered if anyone has ever attempted a single carb conversion?

Yep, gonna lose some performance, probably not going to be too thrilling above 5-6000 rpm, but as a commuter bike I was wondering how much you could improve the mileage - doubtful I would do it - the Mullholland, Malibu, Piuma canyon roads are way too much fun to kill performance, and too much work for a few bucks in gas savings, but I am a "thrifty" guy at heart and love to think outside the box..
 
I think of my old Honda Civic 1200's (Which I probably rebuilt about 20-30 of back in the lean years) it was a pretty capable little engine running on a small keihin 2 barrel Carburooster - About 40 mpg and at least 3 times heavier than a connie...

Throwing a Weber 32/32 on those engines made them really wake up, and I know a couple companies adapted motorcycle carbs to that engine to make it a screamer (for the 70's) little engine... I only built one with that potential, would rev to around 9 grand until valve float and the fear of walking to work made me ease up.. not bad for a $200. car, but I digress.

Anyone ever consider or try? Steve in Sunny Fla, this seems like something a curious guy like you might have tried...

Please be kind, I am just curious, and don't need a pile of shamers beating me up!!

Enjoy the ride, be safe!

Offline Bud

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Re: Blasphemy! Single carb on ZG1000?
« Reply #1 on: October 03, 2017, 05:02:01 pm »
 :popcorncouple: :popcorncouple: :103: :campfire:

Offline Mettler1

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Re: Blasphemy! Single carb on ZG1000?
« Reply #2 on: October 03, 2017, 05:10:19 pm »

   Interesting post. Let's see where it goes.  :??:
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Offline connie_rider

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Re: Blasphemy! Single carb on ZG1000?
« Reply #3 on: October 03, 2017, 05:15:52 pm »
I know of a guy that went from 4 carbs to 1 {large carb} on another bike.
He gained a lot of performance!

NOTE:He changed to 1 carb to make it easier to install his turbo charger...   >:D

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Offline Harry Martin

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Re: Blasphemy! Single carb on ZG1000?
« Reply #4 on: October 03, 2017, 05:32:56 pm »
Harry in Wild and Windy Casper, WY - 1986 Vintage "Silverdammit" - 2015 "Greendammit"

Offline m in sc

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Re: Blasphemy! Single carb on ZG1000?
« Reply #5 on: October 03, 2017, 05:35:22 pm »
weber conversions on goldwings are pretty good actually. so, why not? but seems like a lot of work on a c10 for performance loss.

Offline Steve in Sunny Fla

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Re: Blasphemy! Single carb on ZG1000?
« Reply #6 on: October 03, 2017, 08:14:52 pm »
The length and shape of the intake and ports is going to cause fuel to drop out on the way to the cylinders. I personally don't think it's going to improve any fuel economy . Steve
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Offline Mcfly

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Re: Blasphemy! Single carb on ZG1000?
« Reply #7 on: October 03, 2017, 09:44:26 pm »


Now THAT'S FUNNY!   :D :D :D    :rotflmao: :rotflmao: :rotflmao:    :D :D :D   :beerchug:
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Offline RWulf

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Re: Blasphemy! Single carb on ZG1000?
« Reply #8 on: October 04, 2017, 01:50:12 pm »
All I can see is a lot of compromises.
Wouldn't want to try this myself.

Offline kkja13

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Re: Blasphemy! Single carb on ZG1000?
« Reply #9 on: October 04, 2017, 10:07:25 pm »
Installing a single carb was something that folks did to the first gen Gold Wings.  Of course their intake runners are much longer on the opposed 4 cyl engine configuration which would make it work better, and they had room for it.   I'm not sure on a Connie where a single carb could be mounted and what to do with air filtration.

Gold Wing single carb intake pic below
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Offline Mcfly

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Re: Blasphemy! Single carb on ZG1000?
« Reply #10 on: October 04, 2017, 10:18:49 pm »
Well, I say if you're going to 1 carb, why not make it throttle body injection....

Seeing as we're gettin' all whack-a-doodle -n- all.
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Offline JimBob

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Re: Blasphemy! Single carb on ZG1000?
« Reply #11 on: October 05, 2017, 04:30:54 am »
Well, I say if you're going to 1 carb, why not make it throttle body injection....

Seeing as we're gettin' all whack-a-doodle -n- all.


Hahahahahaha.


Well to continue the wack-a-doodle....


The intake runner of the Wing touches on what I think the big difference is between multi-carb vs single - intake runner tuning.


With no intake runner we can rely on the carb to maintain charge velocity. GO to a single carb now you have an intake that's going to influence intake charge velocity - which varies from low throttle to wide open. I think it's a whole new flow dynamics game when you make a change like that.

Offline MAN OF BLUES

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Re: Blasphemy! Single carb on ZG1000?
« Reply #12 on: October 05, 2017, 04:48:59 am »
Also note that the single manifold/carb setup, shows clearly the flow path is lateral, and downwards... downwards being the key.. and being far from the engines head, heatwise, keeps the fuel at a lower temp when atomized, and cool.fuel is ...cool...

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Offline danodemotoman

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Re: Blasphemy! Single carb on ZG1000?
« Reply #13 on: October 05, 2017, 07:36:49 am »
 In addition make the firing order sound like... potato, potato  :D

Offline m in sc

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Re: Blasphemy! Single carb on ZG1000?
« Reply #14 on: October 05, 2017, 11:42:12 am »
ive seen side drafts done on a few bikes as well. some worked, some didn't.  one thing that i HAVE heard works relatively well is moving to 2 separate carbs on cb750s.  sort of the same spirit. https://www.speedmotoco.com/cb750-DOHC-vm34-dual-carb-Mikuni-Speedmotoco-p/km-vm34-dohc.htm

i know these were initially developed for sohc cb750 shoppers so the frame rail (on a chopper frame) could be lower and not foul the stock carb rack. then the dohc guys got into it.


however, the stock carbs work just fine. its an interesting frankenproject for sure if you are really bored i think.

Offline Mcfly

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Re: Blasphemy! Single carb on ZG1000?
« Reply #15 on: October 05, 2017, 08:55:28 pm »
I just can't see why  anyone would go from four carbs to one these days...
Seems like trying to resolve four 'problems' with one.  EFI C10s are out there
admittedly sparse, but most of the r+d is done.... 
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Offline m in sc

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Re: Blasphemy! Single carb on ZG1000?
« Reply #16 on: October 06, 2017, 01:10:29 pm »
I just can't see why  anyone would go from four carbs to one these days...
Seems like trying to resolve four 'problems' with one.  EFI C10s are out there
admittedly sparse, but most of the r+d is done....

laziness i think. on the pull thru turbo bike (old XS) we were at a single carb but moving to fi next year with direct runner injectors. I got some machinin' to do   :D

Offline Mcfly

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Re: Blasphemy! Single carb on ZG1000?
« Reply #17 on: October 06, 2017, 10:42:19 pm »
Ohhh...  Laziness....  Why didn’cha say so!   ;D




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Offline m in sc

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Re: Blasphemy! Single carb on ZG1000?
« Reply #18 on: October 07, 2017, 11:54:49 am »
Ohhh...  Laziness....  Why didn’cha say so!   ;D
ha. well, to expound.. every person ive personally talked to that wanted to do this to some capacity was so they 'didn't have to mess with a bunch of carburetors'   always amazed me how much work somebody was willing to do to save themselves from.. work.  :rotflmao:

Offline connieklr

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Re: Blasphemy! Single carb on ZG1000?
« Reply #19 on: October 07, 2017, 05:56:21 pm »
Trying to sync that sucker would be an exercise in futility. Kinda like the fella running around a silo trying to find a corner to pi$$ in.   :??:
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Offline Mettler1

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Re: Blasphemy! Single carb on ZG1000?
« Reply #20 on: October 07, 2017, 06:42:41 pm »
Trying to sync that sucker would be an exercise in futility. Kinda like the fella running around a silo trying to find a corner to pi$$ in.   :??:
 

   So where do you pee?? Or do you just wet yourself!! :rotflmao: :rotflmao:
'94 Concours 115,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,SiSF'sTorque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators, SiSF carb Spa, Delkevic exhaust, Murphs' knee savers +grips, etc

Offline Rev Ryder

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Re: Blasphemy! Single carb on ZG1000?
« Reply #21 on: October 07, 2017, 09:33:26 pm »
<SNIP>
 EFI C10s are out there
admittedly sparse, but most of the r+d is done....

They're thick as fleas around my garage.  Purple, black, green... turbo, NA, we gots em.
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Offline Mcfly

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Re: Blasphemy! Single carb on ZG1000?
« Reply #22 on: October 07, 2017, 11:44:23 pm »
<SNIP>
 EFI C10s are out there
admittedly sparse, but most of the r+d is done....

They're thick as fleas around my garage.  Purple, black, green... turbo, NA, we gots em.

I figgered they'd be hangin' from rafters to keep 'em dry.    ;D

So when is that plug n play efi system being put on the market Rev?   :pokestick:
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Offline connieklr

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Re: Blasphemy! Single carb on ZG1000?
« Reply #23 on: October 08, 2017, 02:19:18 pm »
Trying to sync that sucker would be an exercise in futility. Kinda like the fella running around a silo trying to find a corner to pi$$ in.   :??:
 

   So where do you pee?? Or do you just wet yourself!! :rotflmao: :rotflmao:

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Offline Rev Ryder

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Re: Blasphemy! Single carb on ZG1000?
« Reply #24 on: October 09, 2017, 02:13:37 am »
<SNIP>
 EFI C10s are out there
admittedly sparse, but most of the r+d is done....

They're thick as fleas around my garage.  Purple, black, green... turbo, NA, we gots em.

I figgered they'd be hangin' from rafters to keep 'em dry.    ;D

So when is that plug n play efi system being put on the market Rev?   :pokestick:

If folks really wanna spend that money, I'll do it, but evidence says they don't.  I can put it all together, but you're looking at around $1500 to get a PnP FUEL ONLY system and that's a basic setup with no bells and whistles.  So, anyone wants to do that, give me a shout.  We'll make it happen. 

If you want to DIY, I'll help all I can and will give you a free flash.  Expect to spend around a $1000 in parts and materials.  I'll tell you what you need to know and hold your hand best that I can.  I built a partial kit for Kevin Gore (pretty complete wiring harness, modified throttle bodies with correct injectors, flashed ECU) and after a bit of online tuning (using Team Viewer) and a lot of head scratching and eventually adding a WBO2 for fine tuning, it is running and riding, but a partial kit or anything less than everything is not enough IMHO.  I won't be trying that again.  Too difficult from thousands of miles away when I cannot have real control of the project or hands-on for troubleshooting.  Are there easier or cheaper ways to do it than my way?  Not yet.  You COULD adapt the ECU and wiring from another bike and then add a power commander with autotune to tune it, but I doubt that would save you money and you'd have more to go wrong than a standalone system since you'd be adding the PCIII+.


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