Holley float question
Melting Slicks
Joined: Aug 2000
Posts: 3,077
Likes: 2
From: The Garden Spot of the Garden State
Re: Holley float question (bondo478)
....i'm no expert here but gas leaking from the venturis, to me, doesn't sound like a symptom of a high float...that sounds like too much like high gas line pressure in the float bowl (usually a sign of bad inlet valve o rings or dirt on the valve surfaces)...not sure......i would think that carbs are fairly tolerant of high gas float bowl levels but intolerant of low levels because of starvation.....i would look for leaking float level ports on the side of the bowl or sloshing pushing raw gas up through the float bowl vent.....
...if i'm wrong, sorry about that but what leads you to believe you have a problem with float height adjustment?
[Modified by Kid_Again, 7:05 AM 9/20/2002]
...if i'm wrong, sorry about that but what leads you to believe you have a problem with float height adjustment?
[Modified by Kid_Again, 7:05 AM 9/20/2002]
Thread Starter
Racer
Joined: May 2001
Posts: 270
Likes: 66
From: Bath, NY USA
Re: Holley float question (Kid_Again)
I think I had a couple of problems. I removed the inspection screw and gas ran out. Tried adjusting the float but it turns out that the needle valve was sticking open and letting too much gas into the bowl. Now the needle valve is stuck closed so I am going to take it apart and fix that. The car was acting sluggish when this was all happening and I was just wondering if this sounds related or if there are any other things I should be looking at. It idled and ran great, It was just extremely hesitant to take off if you stepped on the gas at anything less than 3000RPMs.
Melting Slicks
Joined: Jul 2001
Posts: 2,664
Likes: 1
From: Boston MA
Re: Holley float question (bondo478)
Just one guy's opinion here - if you're rebuilding it, replace the stock hollow brass floats with solid neoprene floats. The hollow ones can and do leak inwards, which causes too high a fuel level in the bowl.
Team Owner
Joined: Mar 2002
Posts: 44,627
Likes: 1,826
From: Huntsville AL
Re: Holley float question (bondo478)
Bondo
There is a vent tube just aft of mettering block at the top of main body. (forward part of top main body) If Fuel float cutoff is set to high fuel will run out of this vent into the carb causing flooding. Also, if floats have holes in them, no matter how much you turn the adj screw, you will still have the same problem. Been there before!!!
There is a vent tube just aft of mettering block at the top of main body. (forward part of top main body) If Fuel float cutoff is set to high fuel will run out of this vent into the carb causing flooding. Also, if floats have holes in them, no matter how much you turn the adj screw, you will still have the same problem. Been there before!!!
Melting Slicks
Joined: Aug 2000
Posts: 3,077
Likes: 2
From: The Garden Spot of the Garden State
Re: Holley float question (Mr D.)
...i should have raised Mr D.'s point before but in the sense of a warning...i assume you're running the car in the garage and observing the carb....i had a car (because of bad inlet valves) shoot gas straight up the vent tube which causes the car to flood - two MAJOR problems with that...the first is an imminent fire hazard, the second is that you are routinely pouring raw gas into the cylinders, washing them down and removing lubrication...all that raw gas finds its way into your oil which dilutes it, and yes, you can seize the engine if you run it long enough......
...if it was my car, new floats of your choice, new gas inlet valves ($20 now versus the long term consequences), change the oil and filter, adjust the floats and see where you are
good luck
...if it was my car, new floats of your choice, new gas inlet valves ($20 now versus the long term consequences), change the oil and filter, adjust the floats and see where you are
good luck
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Racer
Joined: Jul 2000
Posts: 395
Likes: 1
From: Los Altos Hills Ca.
Re: Holley float question (Mr D.)
Holley carbs are quite a handful. Does anyone know what might cause a slight stumble/cough just when you hit the accelerator coming off of closed throttle? Typically it happens when you shift into first or second and try to accelerate using moderate pressure on the pedal. If you really pop the throttle, it is much reduced. I recently had some work done on the carb including new secondary vac advance and new accelerator pump. I think it possible that the accelerator pump cam lever (little plastic cam which comes in about 30 different sizes) may be the culprit. Anyone have experience with this? Does it just need a more aggressive cam? I hope that this is the problem, because this cam can be easily replaced on the outside of the carb.
Other than this slight annoyance, the thing is a beast. It easily beats my C5.
Mark
Other than this slight annoyance, the thing is a beast. It easily beats my C5.
Mark
