<VV> FW: Weird carb problem

[Daniel Monasterio]

From: dmonasterio at hotmail.com
To: sethracer at aol.com
Subject: RE: <VV> Weird carb problem
Date: Mon, 8 Feb 2010 14:12:07 -0800








Just coming back to civilization !

   Switched carbs and, the troubble remained on left bank so, was not carb problem. Did a compression check and cylinder # 2 showed 120 psi while all others were at 150 psi. Next step will be readjusting valves on # 2 and, maybe left it with some clattering for a while, then readjust and make a new sniffer test. If it doesn´t work, well... will need to remove left head. Hope to have it done by this weekend.
   Thanks a lot to you VV guys !!

Daniel Monasterio

From: Sethracer at aol.com
Date: Sun, 31 Jan 2010 14:00:35 -0500
Subject: Re: <VV> Weird carb problem
To: dmonasterio at hotmail.com










In a message dated 1/30/2010 5:32:14 P.M. Pacific Standard Time, 
dmonasterio at hotmail.com writes:
  
  Removed both carb tops and checked gas level from top and, it was equal (+/- 
  0.700") on both carbs. Lowered the left float to 1.180", just to see for any 
  change but, the venturi  continued dripping at high rpm, showing a very 
  low decrease on CO emissions (6.4 to 5.8 %). As a reference, the right bank 
  exhaust shows 2.1 % CO. Both venturies are 0.024" idle jet, 0.045" main well 
  air bleed, and 0.075" idle air bleed. 


Daniel - Perhaps something else (external) is causing the 
left carb to do that, perhaps a pulsing in the intake. Just to make sure it 
is the left side carb, swap them left to right. (I know that is a bunch of work, 
but if the problem goes with it, you KNOW it is the carb itself.) I kind of 
agree with Matt, it sounds like something in the cluster or bleeds. Once the 
carb comes off idle only running, like at the 2000 RPM you mentioned, 
something may be restricting the air flow, causing the mixture to go rich - but 
since you see the leaking of gas out of the cluster. (PS - Using your 
timing light by shining it down the carb throat is a great way to see ambient 
flow - it really freezes the fuel!) Perhaps your fuel pump is overcoming the 
needle and seat on the left carb, raising the level a little bit. If you have 
another needle/seat available, that is worth changing out, just in 
case. 
 
Seth 
Emerson




 		 	   		  
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