 Carb balancing
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Joined: Jan 2005
Posts: 1,485
Learned Hand
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OP
Learned Hand
Joined: Jan 2005
Posts: 1,485 |
Went to balance the carbs last night. Left side registered a solid '19' on the scale while the right bounces around '19', like '18.8' to '19.2', but right around '19'.
Any idea what would cause one side to bounce and one side to hold rock steady?
"Despite all the amputation, you could dance to a rock 'n roll station..."
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Re: Carb balancing
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
You have one gauge that the regulator is slightly different than the other. Can you gang both hoses up to run off one vacuum port so you can calibrate both?
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: Carb balancing
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Joined: Jan 2005
Posts: 1,485
Learned Hand
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OP
Learned Hand
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Not sure what you mean Ed. The balancer has a separate port for each side and that's how I had it hooked up. Guess I'm just not seeing it.
"Despite all the amputation, you could dance to a rock 'n roll station..."
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Re: Carb balancing
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Joined: Dec 2006
Posts: 7,028 Likes: 8
New Tires
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New Tires
Joined: Dec 2006
Posts: 7,028 Likes: 8 |
Don't balance them at idle or you'll get lots bouncing. Also, switch the tubes around and do it a second time. Are you using a bought meter or did you make your own, just curious? FYI, go to Carbtune.com for some info, it's Carbtune specific, but a manometer is a manometer. 
Last edited by MACMC; 04/25/2012 10:14 AM.
Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.
H. L. Mencken
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Re: Carb balancing
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Joined: Jan 2005
Posts: 1,485
Learned Hand
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OP
Learned Hand
Joined: Jan 2005
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Yeah, I was balancing at idle so maybe that's part of it. Using a Carbtune, pretty nice instrument. And I did switch the hoses around and the right side always has the flutter. It's not much but still looks a little suspect.
"Despite all the amputation, you could dance to a rock 'n roll station..."
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Re: Carb balancing
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Joined: May 2007
Posts: 6,432 Likes: 1
Worn Saddle
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Worn Saddle
Joined: May 2007
Posts: 6,432 Likes: 1 |
I don't know that brand but there should be a screw type valve on each inlet to adjust the gauge to smooth out the needle response. To regulate the gauges you then hook both hoses up to a single vacuum port via a 'T' adapter and a third hose. You then adjust the inlet screws to obtain the steadiest reading on both gauges. You just have one gauge where the smoothing valve is a little more open than the other.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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Re: Carb balancing
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Joined: Dec 2006
Posts: 7,028 Likes: 8
New Tires
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New Tires
Joined: Dec 2006
Posts: 7,028 Likes: 8 |
Well if you got a Carbtune your cookin with gas. You'll get it good luck.
Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.
H. L. Mencken
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Re: Carb balancing
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Joined: Jan 2005
Posts: 1,485
Learned Hand
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OP
Learned Hand
Joined: Jan 2005
Posts: 1,485 |
Think I see what you're saying now.....like the one of gauge's need sto be tweaked maybe. I will say though that when I switched the hoses whichever gauge had the right side carb was the one that fluttered.
"Despite all the amputation, you could dance to a rock 'n roll station..."
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Re: Carb balancing
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Joined: Dec 2006
Posts: 7,028 Likes: 8
New Tires
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New Tires
Joined: Dec 2006
Posts: 7,028 Likes: 8 |
If you switched hoses between carbs and you still got a flutter on the right side carb you probably have a air leak on the right side carb rubbers.
Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.
H. L. Mencken
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Re: Carb balancing
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Joined: Feb 2007
Posts: 23,194 Likes: 56
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,194 Likes: 56 |
To gang them for calibration you can get a Y shaped vacuum fitting and run the hoses to that them 1 to each side at a time to get a reading on each. Then separate again and adjust accordingly.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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