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Topic: Holley carb backfire update
From: slidell, LA, USA
Registered: Jul 2002
posted 08-07-2002 08:55 AM
As many of you may not know I have been having trouble with coughing and belching of flames coming out of my vacuum secondary Holley 1450 carb.
I found that the float level of this BRAND NEW OUTDA BOX carb was at least 2 turns high on the secondary float and about 1 1/2 turns low on the front float. I also am playing around with my secondary springs and it seems to make quite a bit of difference from one to another.
Do any of you guys think that the float levels could have been a big factor? I am confused because at idle for long periods the car would burn your eyes and the plugs show really rich. But when running and punching it the car would sputter and backfire through the carb like a lean condition.
Could the floats being too high on the secondary cause irratic idle and rich idle condition ( i have the idle screws 1 turn out each and it is still rich)?
engine is 351 cleveland, mild cam , headers, duals, pertronix, performer intake, holley 1450 600 cfm carb.
From: doerun, ga.
Registered: Nov 2000
posted 08-07-2002 09:24 AM
the float being to high could easily cause a flooding condition. it was probably overflowing into the carb. have you adjusted it yet? with the engine not running, look down into the carb and see if you see any gas dripping into it. you could possibly have a bad needle and seat or a small piece of trash in it. the holleys usually come set pretty close out of the box. of course the guy (or girl) that assembled yours might have been pi$$ed off at the boss that day. good luck
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
From: Lyons, IL, USA
Registered: May 99
posted 08-07-2002 10:50 AM
That's the beauty of a Holley.
Everything is easily adjustable.
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