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Registered
Join Date: Jan 2008
Location: sunny buffalo
Posts: 1,000
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Does anyone measure pump volume?
Weber 40 IDT carbs, I see this discussed very little and wondering how often this is completed? The vial is available from Porsche, anybody else?
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05-11-2024, 12:11 PM
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Join Date: Mar 2019
Posts: 1,614
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It's a standard measurement when diagnosing a driveability issue. Pump volume along with pressure. Problems would usually manifest themselves at WOT in higher gears.
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05-11-2024, 12:35 PM
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It's a 914 ...
Join Date: Jan 2008
Location: Ossining, NY
Posts: 4,704
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Do you mean fuel pump or accelerator pump volume? You mention a vial, so I assume accelerator pump is what you're asking about? You can use a 1 cc plastic syringe (no needle) with the end glued or melted shut, and hang it down for measuring with a piece of wire. It's an important measurement and worth doing.
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05-12-2024, 05:32 AM
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Join Date: Jan 2006
Location: Clayton NC
Posts: 1,674
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Pretty sure he means accelerator pump since he mentions the vial. And yes, I check mine.
__________________
gary 70T coupe forever almost done 88 Carrera Targa diamond blue |
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05-12-2024, 06:13 AM
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Registered
Join Date: Jan 2008
Location: sunny buffalo
Posts: 1,000
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Yes, thank you, accelerator pump volume. Is there an alternate place to source the vial? I am unable to find something cheap/simple/easy.
Also, should the squirt be directed straight down the carb throat, or directed towards the wall of the venturi's for better atomization? |
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05-13-2024, 03:49 AM
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