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Old 10-14-2012, 04:30 PM
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Blower back fire.

I am having a problem with my 426 cube inch motor . the motor has a bds blower systems with two 650 carters on top . W hat is going on is at an idle the motor run fine . Once I drive the car on the street i get passed one third throttle the motor back fires in the blower . I have retarted the timing to 32 d. total still have same problem . Also I have installed a HUASE FUEL PUMP . I STILL HAVE THE SAME .Help there must be some one out there that has run into this problem .

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Old 10-14-2012, 04:34 PM
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Start with checking the float levels. It sounds like you are going lean. Make sure both carbs are actually getting fuel. If the secondary one is not it will lean out as soon as the blades begin to open.
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Old 10-14-2012, 04:57 PM
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Originally Posted by ED WALCOT View Post
Also I have installed a HUASE FUEL PUMP
I have no idea what this is. Can you be more specific? Have you monitored the fuel pressure at the carb inlets? Is this a late Hemi (426)?
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Power enrichment (power valves if it was Holley) systems are not getting correct signal or jetting too lean
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