Performance Jet Kit
This kit is used to make the air/fuel mixture richer. A properly jetted carburetor, that worked well a couple of years ago, may have lost some of its performance due to today's leaner fuels. Some symptoms of a lean fuel condition are: needing to adjust the idle too high, rough idle, hesitation or stumble on acceleration, a flat spot at around 2500 RPM and/or surging at a constant RPM in higher gears.
Along with leaner fuels, any modifications to an engine to improve performance can compound the lean effect and require more mixed fuel volume. Modifications could be as simple as an opened or larger air filter, an open exhaust system, or ignition modifications. Some modifications could be as extensive as a larger camshaft, head modifications, headers, or increased engine displacement. Also, altitude & extreme temperature or humidity affects the air to fuel ratio. Any and all of these modifications are exaggerated when combined with the lean fuel.
Weber recognizes your need to have a variety of jets for all circuits available when tuning your engine. These jet kits come with simple tuning instructions and a variety of jets to cover the stock and modified engine and are designed using years of experience jetting carburetors on engines all over the country with all types of modifications. If you are experiencing any of these symptoms from your Weber carburetor or simply want to improve the quality and performance from your engine, these kits are for you.
These jet kits contain mains and air jet ranges developed around traditional calibrations, based on Venturi and engine displacements. Kits should provide a range of calibration flexibility to help tune most applications.
Kit Includes (1) of Each:
- Main Jets - 150, 155, 160
- Air Correction Jets - 190, 200, 210
- Choke Side Idle Jets - 50, 55, 60
- Left Side Idle Jets - 50, 55, 60
NOTE: Jets and kits are non-returnable items! In order to lean your air/fuel mixture, you must order individual jet sizes.
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- Weber 38 DGAS/ DGMS/ DGES Carburetors
13 Reviews Hide Reviews Show Reviews
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Works as advertised
It is indeed, larger jets.
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Tim Coufal give 5 stars
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Nice !
Quality kit , unfortunately I ordered this "performance kit " meant to order High Elevation kit . But the High Elevation kits i've used before have been a very nice upgrade and carb tuning device for my Weber 38s Thanks LC !
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kit
as expected. great product. great people in sales
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Worked great
This performance kit plus an air fuel gauge really helped me get my truck perfectly tuned
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A very straightforward and easy purchase . Couldn't be happier
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Jet kit
Able to adjust to my truck’s set up with ease, maybe later I will try jetting higher and see outcome. Your sales team has been very helpful in completing the jets which were short of the 160 main jets. AJ and Bryan quickly addressed the issue and sent jets to me. Always a pleasure doing business with you folks and your high performance products.
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Great shipping/support
Asked to change billing state and response time was quick. The next day it shipped out and by Monday it was at my PO. That was from The mainland to Hawaii too. Awesome service!