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  Holley carb backfire update

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Author Topic:   Holley carb backfire update
dlewis
Journeyman

Posts: 10
From: slidell, LA, USA
Registered: Jul 2002

posted 08-07-2002 08:55 AM     Click Here to See the Profile for dlewis   Click Here to Email dlewis     Edit/Delete Message   Reply w/Quote
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.


thanks

darren

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capri man
Gearhead

Posts: 3600
From: doerun, ga.
Registered: Nov 2000

posted 08-07-2002 09:24 AM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
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

------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141

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Moneymaker
Administrator

Posts: 19751
From: Lyons, IL, USA
Registered: May 99

posted 08-07-2002 10:50 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
That's the beauty of a Holley.
Everything is easily adjustable.

------------------
Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator

NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
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The Barry of BarrysGrrl

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