Another need help identifying this carburetor thread..

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j par

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I inherited this carburetor on the engine of the truck that I just bought... It looks relatively new... I'm going to sell it but I don't know what to put in the ad like how many CFM and so forth... I searched it over and over and could only find this one number 4508037..
It's a quick fuel technologies...
I appreciate anybody's help and experience... Thank you..
IMG_20210226_165243.jpg
IMG_20210226_165254.jpg
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Sounds like 600 cfm vac sec from the bore sizes. It doesn't have a secondary metering block, only a plate, so it wouldn't be a 'performance' model.
 
Found this on their website
SLAYER SERIES

Slayer.jpg


The Slayer Series brings QFT engineering innovations to cost-conscious and performance-oriented enthusiasts. The series is filled with QFT time and race-tested features.


  • All-Aluminium Construction - Main Body, Fuel Bowls, Throttle Body
  • Changeable Idle, Air and High-Speed Bleeds
  • Built-in Sight Glass for Easy Float Adjustment
  • 3-Stage Emulsion Circuits in Primary Metering Block
  • Changeable Primary Idle Feed Restrictions and Power Valve Channel Restrictions
  • Vacuum Secondary w/ QuickSet Adjustment
  • Secondary Plate w/ Changeable Jets
  • Notched Float in Secondary Fuel Bowl
  • Electric Choke - Fully Adjustable, One Wire Hookup
  • Ford Kick Down Included
SL-1957E.jpg


Part Number CFM Application & Description
SL-450-VS 450 1-9/16" throttle bore
SL-600-VSF 600 1.312" venturi, 1-9/16" throttle bore
SL-750-VSF 750 1.375" venturi, 1-11/16" throttle bore
SL-1957E
600
1.312" venturi, 1-9/16" throttle bore
BD-1957
600
1.312" venturi, 1-9/16" throttle bore
SL-600-VS-Slayer-Small.jpg


QFT's New 600CFM carburetor was designed as a street performance carb that is also suitable for stock engines. It flows 600 cfm through 1-9/16-inch throttle bores and 1.312-inch venturis. They have a secondary metering plate with changeable jets and a 3-stage emulsion circuit. On the BD version, the Black Diamond coating reduces fuel temperatures by up to 6%, and is extremely scratch and corrosion resistant. This proprietary coating keeps your carb looking factory fresh for years, even under harsh environmental conditions. A billet aluminium primary metering block and throttle body provides added strength, precise metering, and zero porosity.


Quick Fuel makes carb tuning and setup very simple with its QuickSet vacuum secondary housing that allows you to adjust the secondary opening rate with a simple screw adjustment, instead of removing the housing cover and swapping springs. As with all Quick Fuel carbs, interchangeable bleeds allow you to fine tune both the idle and high speed circuits. QFT's fully adjustable choke requires a simple one-wire hookup and you are ready to go. All BD-1957 and SL-1957E carbs come with Ford A/T kickdown linkage included.


BD-1957.jpg
 
Found this on their website
SLAYER SERIES

View attachment 1715698712

The Slayer Series brings QFT engineering innovations to cost-conscious and performance-oriented enthusiasts. The series is filled with QFT time and race-tested features.


  • All-Aluminium Construction - Main Body, Fuel Bowls, Throttle Body
  • Changeable Idle, Air and High-Speed Bleeds
  • Built-in Sight Glass for Easy Float Adjustment
  • 3-Stage Emulsion Circuits in Primary Metering Block
  • Changeable Primary Idle Feed Restrictions and Power Valve Channel Restrictions
  • Vacuum Secondary w/ QuickSet Adjustment
  • Secondary Plate w/ Changeable Jets
  • Notched Float in Secondary Fuel Bowl
  • Electric Choke - Fully Adjustable, One Wire Hookup
  • Ford Kick Down Included
View attachment 1715698713

Part Number CFM Application & Description
SL-450-VS 450 1-9/16" throttle bore
SL-600-VSF 600 1.312" venturi, 1-9/16" throttle bore
SL-750-VSF 750 1.375" venturi, 1-11/16" throttle bore
SL-1957E
600
1.312" venturi, 1-9/16" throttle bore
BD-1957
600
1.312" venturi, 1-9/16" throttle bore
View attachment 1715698714

QFT's New 600CFM carburetor was designed as a street performance carb that is also suitable for stock engines. It flows 600 cfm through 1-9/16-inch throttle bores and 1.312-inch venturis. They have a secondary metering plate with changeable jets and a 3-stage emulsion circuit. On the BD version, the Black Diamond coating reduces fuel temperatures by up to 6%, and is extremely scratch and corrosion resistant. This proprietary coating keeps your carb looking factory fresh for years, even under harsh environmental conditions. A billet aluminium primary metering block and throttle body provides added strength, precise metering, and zero porosity.


Quick Fuel makes carb tuning and setup very simple with its QuickSet vacuum secondary housing that allows you to adjust the secondary opening rate with a simple screw adjustment, instead of removing the housing cover and swapping springs. As with all Quick Fuel carbs, interchangeable bleeds allow you to fine tune both the idle and high speed circuits. QFT's fully adjustable choke requires a simple one-wire hookup and you are ready to go. All BD-1957 and SL-1957E carbs come with Ford A/T kickdown linkage included.


View attachment 1715698715
Yuppers, that looks like it?..
THANK you...
 
I measured it with my Harbor Freight digital caliper...

The venturi diameter is 1.56??? I'm referring to the tight area around the booster midway down the venturi where it necks down. Are you able to get a measurement of that diameter?
 
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