Equalizer line instead of syncing carbs

  • 1981jmotor
  • Topic Author
  • Offline
  • User
  • shade tree mechanic
More
24 May 2010 06:36 #370416 by 1981jmotor
Equalizer line instead of syncing carbs was created by 1981jmotor
I have been known to dream stuff up.
I was once working at this warehouse that had lots of traffic at at a 3-way blind corner. I bought some rope, and cowbells, and some hardware and installed a warning bell just by pulling on the rope when approaching the corner.
Where I work now, we have a lab coat closet where people were constantly leaving the sliding doors open. I bought a weight, some pulleys, and some thin steel cable, and now the weight pulls the doors closed. It has been in use for months with a minimum of repairs.
I had this 1980 Chevy LUV, and went hog wild with gadgets on it. I installed a power hood release, and took a house thermostat, and power transistor, and other items and created climate control on that LUV.
Now, all that to say that every once in a while, my ideas work out.
With all the importance put on syncing carbs, why cannot a equalizer line/tube be put across the intakes of a 4-cyl motorcyle. I am using the stock airbox, and so there is almost no room to do this, but why couldn't someone with pods install a permanent tube, maybe 5/8" I.D., to equalized the vacuum?

1981 Kawasaki CSR 1000

First bike ever at 14 years old was 1969 Honda CL 175.
Bought a brand new Honda CM400T at 16 years old in 1979.

Please Log in or Create an account to join the conversation.

More
24 May 2010 06:42 #370418 by otakar
Replied by otakar on topic Equalizer line instead of syncing carbs
Because you could never be able to use the side stand. If you did, all the fuel in the #2-3-4 carbs would flow into your #1 carb and because there would be so much of it, it would run into your cylinder and also out the back. If you forgot to shut of your petcock than you would drain the tank threw your #2-3-4 carbs.

74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000

Please Log in or Create an account to join the conversation.

More
24 May 2010 06:46 - 24 May 2010 06:47 #370419 by otakar
Replied by otakar on topic Equalizer line instead of syncing carbs
I also forgot. You would have a similar problem in certain slower banking turns. During some of these turns it could be catastrophic because you would flood certain cylinders and starve others. this could mean an engine shut down in a turn.

74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Last edit: 24 May 2010 06:47 by otakar.

Please Log in or Create an account to join the conversation.

  • 1981jmotor
  • Topic Author
  • Offline
  • User
  • shade tree mechanic
More
24 May 2010 06:48 #370420 by 1981jmotor
Replied by 1981jmotor on topic Equalizer line instead of syncing carbs
Okatar, I am talking about the vacuum, and not the float bowl level. Maybe you are ahead of me already, and you know perfectly well what I meant. Or maybe, my idea is glorious, so innovative, so new, that it is hard to comprehend at first. I am the demigod of motorcyles! No one can ever fully comprehend the depth of my knowledge! :evil::woohoo:

1981 Kawasaki CSR 1000

First bike ever at 14 years old was 1969 Honda CL 175.
Bought a brand new Honda CM400T at 16 years old in 1979.

Please Log in or Create an account to join the conversation.

  • 1981jmotor
  • Topic Author
  • Offline
  • User
  • shade tree mechanic
More
24 May 2010 07:09 #370426 by 1981jmotor
Replied by 1981jmotor on topic Equalizer line instead of syncing carbs
this is a rough sketch I created with MS Paint in 5 minutes.I do not see how the fuel down in the float bowls with ever enter the new tube, at least not at sidestand angle.

1981 Kawasaki CSR 1000

First bike ever at 14 years old was 1969 Honda CL 175.
Bought a brand new Honda CM400T at 16 years old in 1979.

Please Log in or Create an account to join the conversation.

  • 1981jmotor
  • Topic Author
  • Offline
  • User
  • shade tree mechanic
More
24 May 2010 07:10 #370428 by 1981jmotor
Replied by 1981jmotor on topic Equalizer line instead of syncing carbs

1981 Kawasaki CSR 1000

First bike ever at 14 years old was 1969 Honda CL 175.
Bought a brand new Honda CM400T at 16 years old in 1979.
Attachments:

Please Log in or Create an account to join the conversation.

More
24 May 2010 07:23 - 24 May 2010 07:25 #370432 by otakar
Replied by otakar on topic Equalizer line instead of syncing carbs
Sorry My Bad. I don't know where my head was. I was thinking of float bole level adjusting, I don't know why.
What you are saying is actually already there for two of the cylinders that power the pollution valve. The purpose of synchronizing the carburetors is not to create equal vacuum inside the individual intake ports, but to allow each cylinder to run the same RPM during ground idle. This in fact may mean that each carburetor is open differently DEPENDING on the state of each cylinder and its individual vacuum. Once the engine is past ground idle, meaning that the carbs are cracked open even a little bit than this requirement is no longer in affect. When the word synchronizing is being used. it is not the vacuum but the RPM.

74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
Last edit: 24 May 2010 07:25 by otakar.

Please Log in or Create an account to join the conversation.

More
24 May 2010 09:07 #370449 by TexasKZ
Replied by TexasKZ on topic Equalizer line instead of syncing carbs
So how could two cylinders, assuming the pistons are connected to the same crankshaft, run at different rpms? Doesn't rpm measure crankshaft rotation?

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

Please Log in or Create an account to join the conversation.

More
24 May 2010 10:32 #370469 by otakar
Replied by otakar on topic Equalizer line instead of syncing carbs
That is the whole problem and reason why you must synchronize the carbs. Because they ARE connected to the same crank shaft they must run the same RPM but because they have separate crarburetion they want to run differently. The result is that some pistons try to drag tee others. Creating a lean situation in some and a loaded situation in others. The Idea is to adjust them individually so they all run the same RPM.

74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000

Please Log in or Create an account to join the conversation.

  • 1981jmotor
  • Topic Author
  • Offline
  • User
  • shade tree mechanic
More
24 May 2010 10:45 #370474 by 1981jmotor
Replied by 1981jmotor on topic Equalizer line instead of syncing carbs
In agreement with TexasKZ, otakar, if I were to read up on carb syncing, I doubt that I would find advice to adjust the carbs to different vac levels on the manometer and/or guages to achieve the best rpm. I would bet that all advice on syncing points toward adjusting the carbs to achieve equal vacuum reading- the ultimate goal being a smooth idle.
I could be wrong, but it seems to me my equalizer tube would be a direct path to what the manometer is for, and that is to get a smooth idle vis a vis all carbs NOT DISAGREEING WITH EACH OTHER for the fuel/air needs of the engine.
IMO, it is difficult to get 4 carbs to do the exact same thing thru all conditions. Fully warmed up, the manometer may say the carbs are unison, but what about when the bike is warming up with fuel enrichment shafts that are anything but consistent with each other>? huh? :-)

You will be assimilated!

Somebody help little otakar up, so he can wrestle with the titans :-)

1981 Kawasaki CSR 1000

First bike ever at 14 years old was 1969 Honda CL 175.
Bought a brand new Honda CM400T at 16 years old in 1979.

Please Log in or Create an account to join the conversation.

  • Motor Head
  • Offline
  • User
  • FIX UP YOUR BIKE RIGHT AND CHEAP
More
24 May 2010 11:17 #370483 by Motor Head
Replied by Motor Head on topic Equalizer line instead of syncing carbs
You should have said "AFTER SYNCING CARBS" as you still want the air flow as even as possible at all RPM's between the cylinders. That is an Idea to hook all 4 together for an improved Idle, try it and post up the results. Say take a hot Idle RPM reading before and after. Tell us what size tube you used etc.

1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...

Please Log in or Create an account to join the conversation.

  • hugo
  • Offline
  • Sustaining Member
  • '92 Zephyr 750
More
24 May 2010 11:50 - 24 May 2010 11:53 #370493 by hugo
Replied by hugo on topic Equalizer line instead of syncing carbs
I once interconnected all the 4 vacuum nipples in common and on to the fuel petcock, on a '91 Zepnyr 750. I have the air box and did not have much of a problem, however.....

I did not do it to skip sinchronization as I agree with Otakar, that the purpose of sych'ng is to get all the carbs mechanically in synch, and vacuum is only used as indicator. I did it because read somewhere that it would give smoother idling.

I personally did not notice any improvement. Nada. I least nothing that I could feel or hear. Eventually I took the set up off because did not like the clutter, and went back to the two inside carbs connected to the pectock tap for fuel.
Last edit: 24 May 2010 11:53 by hugo.

Please Log in or Create an account to join the conversation.

Powered by Kunena Forum