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What Causes Blower Motor Surge

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Old 12-13-2007, 02:29 PM
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JE, I'll look at whipples web site....Are you familiar with the valve ?

Thanks, LE

PS: We have found a highly engineered valve for holding vacuum on a dry sump motor. Kind of a must have. Might work for bypass on the blower.
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Old 12-13-2007, 04:38 PM
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Tommy at Chief Engines has a cure for that surging idle that involves a vacuum line to the metering block.
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Old 12-14-2007, 11:59 AM
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Originally Posted by OldSchool

Damn, that sounds cool.
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Old 12-14-2007, 03:14 PM
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It does sound cool but it's rough on tranys' and drives, depending on who's on the sticks.

Ron Potter has a good set up, his motors don't seem to surge nearly as badly as most.

AS to the root cause, I'll leave that to the engine gugrus'.
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Old 12-14-2007, 03:20 PM
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If you take the time to set them up it is possible to get a strong smooth idle. Get all the shutters even and make it run on the idle circuits.
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Old 12-14-2007, 03:48 PM
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Originally Posted by Edward R. Cozzi
Tommy at Chief Engines has a cure for that surging idle that involves a vacuum line to the metering block.
I wonder if our motors have that. We have minimal surge compared to others who have blower motors.
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Old 12-14-2007, 04:33 PM
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I have zero surge with only a slight hunt when shifting into neutral but that's normal for a blower motor.

The surging is caused by fuel puddling in the intake. The line that goes to the metering block is most likely a boost reference line...this has been done for years.
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Old 12-15-2007, 09:45 AM
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Originally Posted by Edward R. Cozzi
I like that sound.
Me Too!!!
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Old 12-15-2007, 10:30 AM
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Easy work-around. Warm your motors up in neutral. Shut them down and restart in gear.
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Old 12-16-2007, 07:12 PM
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Talk to Dean Nickerson in PA.
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