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 Post subject: Float Level
 Post Posted: Thu Sep 06, 2012 6:11 am 
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Joined: Sat Jan 07, 2012 5:22 pm
Posts: 63
Whats the story with setting the float level on a 4150/4160. It seems everywhere ive read to set it at the sight level. Reading through some of Shrinkers posts it would seem that its more than that and changing the level would affect the pressure at the jet or am i reading it wrong?

Hysteric


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 Post subject: Re: Float Level
 Post Posted: Thu Sep 06, 2012 8:49 am 
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Joined: Mon Oct 29, 2007 7:07 pm
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Location: Florida
It does have an effect on fuel delivery, if you look at various Holley bowls the sight plug location has been moved to change the calibration for different engines. The same with a lot of production carbs, the diiference between one carb on two different engines may be nothing more than a float level change. For aftermarket Holleys the level was set for the most part the same.


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 Post subject: Re: Float Level
 Post Posted: Thu Sep 06, 2012 5:07 pm 
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Thanks Mark.

Can you expand on how it affects fuel delivery and how it can be used in tuning?

Hysteric


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 Post subject: Re: Float Level
 Post Posted: Thu Sep 06, 2012 8:40 pm 
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Location: Florida
It changes the height of the fuel in the mainwell, changing how quick it's pulled up to the booster. It also keep the emulsion well filled longer before pulling the fuel out and air in. So you change the curve early in the mains operation, and delay the emulsion leaning it out. As far as where is best... one of those thing you need to tune on the car to see what works.


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 Post subject: Re: Float Level
 Post Posted: Fri Sep 14, 2012 7:30 pm 
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Quote:
changing how quick it's pulled up to the booster. It also keep the emulsion well filled longer before pulling the fuel out and air in. So you change the curve early in the mains operation, and delay the emulsion leaning it out.


So a higher float level will give you a richer for longer fuel curve and a lower float level a leaner sooner fuel curve?

Hysteric


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 Post subject: Re: Float Level
 Post Posted: Sun Sep 16, 2012 2:50 pm 
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Location: Elizabethtown, KY
Quick fuel told me to use fuel pressure to set their level. O:) they said to put it half way through the sight glass, about 6 to 6.5 psi. We are at 6 1/4.

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6.7772 @ 101.51 1/8th 10.747 @ 122.24 1/4

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 Post subject: Re: Float Level
 Post Posted: Sun Sep 16, 2012 3:10 pm 
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Location: N.J.
3/8 drill bit always worked for me =;

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