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Location:
sydney, the shire
Registered:
June 2004
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3k-b twin carbys
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Thu, 13 October 2005 07:34
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hey ive got a warm 4k with twin 3k-b carbys that could use bit of a tune for better performance, atm carby 1 is sucking alot more air in than carby 2 but both squirting petrol in.. is there a way to evenly balance the carbys or any other method to get the best out of these carbys? cheers. dave.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 3k-b twin carbys
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Thu, 13 October 2005 08:29
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at idle, adjust the throttle butterly/linkages, to balance the vacuum between the carbs.
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Location:
sydney, the shire
Registered:
June 2004
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Re: 3k-b twin carbys
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Thu, 13 October 2005 09:35
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sweet, thanks oldcorollas, your always there when i need advice on the big girl! 
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 3k-b twin carbys
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Fri, 14 October 2005 09:55
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Get a piece of hose, shove it down each carb with the engine idling, and put your ear on the other end. Listen to the sucking sound, and use this to help adjust the throttle stops to be fairly even. You can then finish off with some clear hose, connected to the vacuum side between the carbs, with some water in it. Balance the water level.
Of course you'll probably get it just fine with 30 seconds and a screwdriver rather than all the messing around I suggested!
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Location:
tallahassee FL usOFa
Registered:
May 2002
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Re: 3k-b twin carbys
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Fri, 14 October 2005 14:41
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position the stethoscope/hose at the SAME position on each.
if this manifold has a small balance port between each carb and/or port, then the vacuum won't mean much because it'll always be equal, unless they're REALLY off.
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