New Thermoquads....

thrashingcows

thrashingcows

Drowning deep in my sea of loathing...so I'm
Seems Demon carbs has come out with a new revolutionary design....Looks rather familiar to me. :hmmm:

medium1901.png


  • 625 CFM air flow - ideal for use on most stock to mildly modified V8s
  • Dual mounting bolt pattern - fits any street 4bbl intake (square flange or spread bore)
  • Electric Choke Management means easy cold starts
  • Single fuel inlet for simple installation
  • Aerospace Composite fuel bowl offers significant heat insulating benefits over aluminum fuel bowl - keeps fuel up to 20º cooler for optimum performance with modern fuels
  • Integrated fuel bowl/main body design with gasket above fuel level and no plugged passages to eliminate all potential leak paths
  • Small 1-3/8” primary throttle bores combined with proven Triple-Stack™ boosters deliver amazingly crisp throttle response and drivability, superior fuel atomization and improved fuel economy
  • Goggle Valve Secondary (GVS™) throttle plate delivers over twice the air flow of the primary bores for power you can hear and feel
  • GVS™ makes total air flow 625 CFM while maintaining the crisp throttle response delivered by small primary bores
  • Secondary air valve control - torsion spring valve control/adjustment permits seamless primary to secondary throttle response regardless of the throttle opening rate (unique contoured profile developed for better cylinder to cylinder fuel distribution)
  • Smooth styling - patented timeless design fits modern as well as traditional themed vehicles (Patent No.: US D648,746 S)
  • Developed from the ground up with great looks and ease of use in mind
  • Easy to clean and maintain
  • One-piece air horn assembly
  • 2 Stage metering rods control easily accessible without carburetor disassembly or removal
  • 4 optional vacuum step-up springs available to dial in hi-end performance
  • 8 optional sets of metering rods available to refine calibration
  • Multiple primary and secondary main jet orifice sizes available
  • Patent pending mechanical design
  • Integrated 700R4/200R4 transmission kickdown cable mounting location for proper shifts
  • Ford A/T kickdown (does not work with AOD transmissions)
  • Available TPS kit allows use with 4L60 and 4L80 transmissions
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Here the link...

http://www.barrygrant.com/1901.asp#1
 
ugh...gimmy a carter 625....i can tune em all i want and i love em...got a fuel issue from sitting..pop the top hose it out button it up and away you go
 
I feel that way toward AVS and AFB carb there 69...give me a nice TQ that I can tune to the nines, and make run like it is throttle body injected...;)
 
i love the afb's..only otehr carb i like as much is the old holley 1brls..tho you cant do much with em there stone cold reliable....as much as i hate dinking with all the jets in the webbers...i still like em better than holleys....and there theres the quadra pukes and thermo bogs..pitcheed over my shoulder..

i like simplicity and reliability...takes only a few moments to clean out an afb...how longs it take to clean out the guts of one of them tq's?
 
The beauty of the thermoquad is in it's adjustability! Do the adjustments in the correct order and it's a carb that is hard to beat!
 
The AFB/Performer is probably one of the worst carbs out there, really. Tuning the secondary air-door opening rate is nearly impossible unless you're amazingly smart with drilling the counterweights. That's one of the reasons the only race cars you see with AFBs are in classes that require them. The Edelbrock/Comp Series AFBs have steel float baffles, and if they sit with fuel in them rust gets everywhere and can't be removed. I've thrown out a couple of Performers because of that.
 
Dr.Jass said:
The AFB/Performer is probably one of the worst carbs out there, really. Tuning the secondary air-door opening rate is nearly impossible unless you're amazingly smart with drilling the counterweights. That's one of the reasons the only race cars you see with AFBs are in classes that require them. The Edelbrock/Comp Series AFBs have steel float baffles, and if they sit with fuel in them rust gets everywhere and can't be removed. I've thrown out a couple of Performers because of that.
Click to expand...

Yep! Me too.
 
I have a new TQ. For real, it's a brand new one from 1978-NOS. It's for a 400 if I remember right.
 
Dr.Jass said:
The AFB/Performer is probably one of the worst carbs out there, really. Tuning the secondary air-door opening rate is nearly impossible unless you're amazingly smart with drilling the counterweights. That's one of the reasons the only race cars you see with AFBs are in classes that require them. The Edelbrock/Comp Series AFBs have steel float baffles, and if they sit with fuel in them rust gets everywhere and can't be removed. I've thrown out a couple of Performers because of that.
Click to expand...

funny that...ive removed them from every afb ive had and most of them got replaced with aluminum
 
You still can't do much with the secondaries without a degree in physics or access to a drill press and mallory metal and a lot of playing. The AVS and TQ were both much-better designs, as is the QuadraJet. Where do you find aluminum float baffles for an AFB/Performer? I've never seen them.
 
I've had exactly one Eddy Performer, and that's all I'll ever have. Everything I've heard and read is pushed me to use the TQ. I printed out that guide one of y'all posted and as soon I get the 400 dropped in I'm going to work on rebuilding and tuning the better one.
 
OK, you can call me "Old school", but I love my AVS carbs. I've been playing with them for over 40 years and know every trick in the book. Who else do you know that's put 1300 CFM of AVSes on a stock 318, gets 21+ mpg and it never bogs. :cool:
 
Dr.Jass said:
You still can't do much with the secondaries without a degree in physics or access to a drill press and mallory metal and a lot of playing. The AVS and TQ were both much-better designs, as is the QuadraJet. Where do you find aluminum float baffles for an AFB/Performer? I've never seen them.
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you make them...its not that hard..i had a carter tha the baffles litteraly slid in an out with ease
 
I like AVS carbs as well, because you can tune the opening rate of the secondary air doors; a ThermoQuad is just a big plastic AVS with a slightly-better metering circuit.

An AFB/Performer is great if you want to bolt it on and go. If you want it to actually perform, that's the last choice in the book (excepting the WCFB :D ).
 
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