Author Topic: Somebody school me on Dominators  (Read 1730 times)

0 Members and 1 Guest are viewing this topic.

Royce

  • Hero Member
  • *****
  • Posts: 777
    • View Profile
Somebody school me on Dominators
« on: June 28, 2021, 09:36:26 AM »
2 circuit vs 3 circuit..   What applications are each one the better choice, and what are the basic differences.. I acquired an older 1150 3 circuit cheaply  Jewel in the rough or PITA?
1955 Thunderbird Competition Coupe Altered Chassis "War Bird" 383 Lincoln Y block 520 hp
1955 Thunderbird 292 275 hp Y Block
1956 Ford Victoria 292 Y block

1957 Mercury 2dr Wagon "Battle Wagon" drag car 
1957 Thunderbird Glass body Tube Chassis drag car 333 cu in 500 hp Ford Y block
1961 Starliner 390/375 clone
1965 GT40 tribute w/FE
1966 Falcon Pro Touring project
Kaase Boss 547. 840 HP 698 Torque  pump gas
1992 BMW V-12 5.0
2001 Lincoln 5.4 4 cam.
1968 Cougar XR7

blykins

  • Hero Member
  • *****
  • Posts: 4855
    • View Profile
    • Lykins Motorsports
Re: Somebody school me on Dominators
« Reply #1 on: June 28, 2021, 09:55:08 AM »
A 2 circuit Dominator just has an idle/transition circuit and a main circuit. 

A 3 circuit Dominator has an extra intermediate circuit.  That circuit is based off of little tubes above the throttle blades.  When the throttle blades open, it adds fuel. 

In a lot of cases the 3 circuit Dominators are hard to get right on street cars and in most race applications.  Most of the carb builders I know prefer the 2 circuit carbs, although a good carb guy can make a 3 circuit carb run ok. 

Some of your really high end carbs can be 4 circuit or 5 circuit. 
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
Instagram:  brentlykinsmotorsports
YouTube:  Lykins Motorsports

Barry_R

  • Hero Member
  • *****
  • Posts: 1927
    • View Profile
    • Survival Motorsports
Re: Somebody school me on Dominators
« Reply #2 on: June 28, 2021, 12:39:58 PM »
Older carb?
Plug the third circuit and tune from there.

gt350hr

  • Hero Member
  • *****
  • Posts: 941
    • View Profile
Re: Somebody school me on Dominators
« Reply #3 on: June 28, 2021, 02:36:17 PM »
  .3rd circuit was added for drag cars held wide open on gear shifts ( Pro Stocks with planetary transmissions) to help when the RPM pulled down from 9500-10,000 to 7.500 or so.

Royce

  • Hero Member
  • *****
  • Posts: 777
    • View Profile
Re: Somebody school me on Dominators
« Reply #4 on: June 28, 2021, 03:38:41 PM »
It's a 9377  will the intermediate circuit be obvious when I remove the metering block?
1955 Thunderbird Competition Coupe Altered Chassis "War Bird" 383 Lincoln Y block 520 hp
1955 Thunderbird 292 275 hp Y Block
1956 Ford Victoria 292 Y block

1957 Mercury 2dr Wagon "Battle Wagon" drag car 
1957 Thunderbird Glass body Tube Chassis drag car 333 cu in 500 hp Ford Y block
1961 Starliner 390/375 clone
1965 GT40 tribute w/FE
1966 Falcon Pro Touring project
Kaase Boss 547. 840 HP 698 Torque  pump gas
1992 BMW V-12 5.0
2001 Lincoln 5.4 4 cam.
1968 Cougar XR7

Royce

  • Hero Member
  • *****
  • Posts: 777
    • View Profile
Re: Somebody school me on Dominators
« Reply #5 on: June 28, 2021, 03:41:11 PM »
Wild guess on how much to jet up when removing the 3rd circuit?
1955 Thunderbird Competition Coupe Altered Chassis "War Bird" 383 Lincoln Y block 520 hp
1955 Thunderbird 292 275 hp Y Block
1956 Ford Victoria 292 Y block

1957 Mercury 2dr Wagon "Battle Wagon" drag car 
1957 Thunderbird Glass body Tube Chassis drag car 333 cu in 500 hp Ford Y block
1961 Starliner 390/375 clone
1965 GT40 tribute w/FE
1966 Falcon Pro Touring project
Kaase Boss 547. 840 HP 698 Torque  pump gas
1992 BMW V-12 5.0
2001 Lincoln 5.4 4 cam.
1968 Cougar XR7

blykins

  • Hero Member
  • *****
  • Posts: 4855
    • View Profile
    • Lykins Motorsports
Re: Somebody school me on Dominators
« Reply #6 on: June 28, 2021, 05:52:10 PM »
Does it have a power valve in it?
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
Custom Roller & Flat Tappet Camshafts
www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
Instagram:  brentlykinsmotorsports
YouTube:  Lykins Motorsports

Royce

  • Hero Member
  • *****
  • Posts: 777
    • View Profile
Re: Somebody school me on Dominators
« Reply #7 on: June 28, 2021, 08:56:14 PM »
It does not... The metering block is not drilled for one...
1955 Thunderbird Competition Coupe Altered Chassis "War Bird" 383 Lincoln Y block 520 hp
1955 Thunderbird 292 275 hp Y Block
1956 Ford Victoria 292 Y block

1957 Mercury 2dr Wagon "Battle Wagon" drag car 
1957 Thunderbird Glass body Tube Chassis drag car 333 cu in 500 hp Ford Y block
1961 Starliner 390/375 clone
1965 GT40 tribute w/FE
1966 Falcon Pro Touring project
Kaase Boss 547. 840 HP 698 Torque  pump gas
1992 BMW V-12 5.0
2001 Lincoln 5.4 4 cam.
1968 Cougar XR7

Barry_R

  • Hero Member
  • *****
  • Posts: 1927
    • View Profile
    • Survival Motorsports
Re: Somebody school me on Dominators
« Reply #8 on: June 29, 2021, 09:46:44 AM »
  .3rd circuit was added for drag cars held wide open on gear shifts ( Pro Stocks with planetary transmissions) to help when the RPM pulled down from 9500-10,000 to 7.500 or so.

Some of the old school Cup stuff used third circuit to fill the hole when rolling back up from corners when all the other circuits were "used up" at half throttle or better.

gt350hr

  • Hero Member
  • *****
  • Posts: 941
    • View Profile
Re: Somebody school me on Dominators
« Reply #9 on: June 29, 2021, 01:21:37 PM »
    Especially when the "tuners" at the track removed the secondary accelerator pump arm for better fuel mileage. ( top secret trick in the day)

Barry_R

  • Hero Member
  • *****
  • Posts: 1927
    • View Profile
    • Survival Motorsports
Re: Somebody school me on Dominators
« Reply #10 on: July 01, 2021, 09:28:42 AM »
    Especially when the "tuners" at the track removed the secondary accelerator pump arm for better fuel mileage. ( top secret trick in the day)

Like old drag racers that would set up the primary pump with a bunch of free slack at idle so they could get the pump shot at higher RPM where they launched...

Falcon67

  • Hero Member
  • *****
  • Posts: 2160
    • View Profile
    • Kelly's Hot Rod Page
Re: Somebody school me on Dominators
« Reply #11 on: July 01, 2021, 09:44:28 AM »

Like old drag racers that would set up the primary pump with a bunch of free slack at idle so they could get the pump shot at higher RPM where they launched...

This is current school, not old school LOL.  Have mine set to contact the arm around 1800 RPM, I stage at 2000~2200 usually.  If on a two step over 3000, you're kinda past all that pump shot stuff.  No two steps in Footbrake.