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best replacement carb for a thermo quad
#739234
07/03/10 08:08 AM
07/03/10 08:08 AM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
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Mt. Vernon, Ohio
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got one on my motorhome/tow barge that need's a serious pitch in the junk pile  and was curious what some of you guy's reccomend, I was thinking about a Holley spreadbore or even a Edelbrock performer,,, the holley I can work on, the Edelbrock works real good if tuned in correctly  ,,,so I was told,,,,so let's hear it.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: best replacement carb for a thermo quad
[Re: dartman366]
#739236
07/03/10 09:15 AM
07/03/10 09:15 AM
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Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581
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master
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
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Holley spreadbore would be my choice.The other thing I would consider is having the TQ you have now rebuilt or have one done up by DemonSizzler.
Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
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Re: best replacement carb for a thermo quad
[Re: blownzoom440]
#739237
07/03/10 11:09 AM
07/03/10 11:09 AM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
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OP
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Mt. Vernon, Ohio
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wouldn't a 600 choke a 440 too much?,, Jeg's has a 650 spread bore, vac secondary,,I even thought about a 750 vac secondary.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: best replacement carb for a thermo quad
[Re: dartman366]
#739238
07/03/10 11:11 AM
07/03/10 11:11 AM
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Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581
master
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master
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
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I don't think it would at all.Remember the TQ you have now is rated at 800 or more cfm.I think the 650 spreadbore would do just fine.
Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
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Re: best replacement carb for a thermo quad
[Re: Chris2581]
#739239
07/03/10 11:15 AM
07/03/10 11:15 AM
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Joined: Nov 2003
Posts: 5,160
Texas
dannysbee
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master
Joined: Nov 2003
Posts: 5,160
Texas
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A well built and tuned thermo quad would be the best choice for replacement in my opinion.
Getting old just means you were smarter than some and luckier than others.
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Re: best replacement carb for a thermo quad
[Re: dartman366]
#739243
07/03/10 12:04 PM
07/03/10 12:04 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOrk !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
got one on my motorhome/tow barge that need's a serious pitch in the junk pile and was curious what some of you guy's reccomend, I was thinking about a Holley spreadbore or even a Edelbrock performer,,, the holley I can work on, the Edelbrock works real good if tuned in correctly ,,,so I was told,,,,so let's hear it.
PITCH IT ....right over here ...I beez the Prez of the ThermoSquad !  
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Re: best replacement carb for a thermo quad
[Re: dOrk !]
#739244
07/03/10 12:13 PM
07/03/10 12:13 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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Hey Bill I have a spread bore 600/650 Double pumper Holley I have $75 in...you can have it for that... its pretty clean, but I havent run it and it needs a kit. The carb is a single line side hung bowl 600- or 650 Double pumper... Havent seen many like this.. Came off a late 60's big block Pontiac.. 
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: best replacement carb for a thermo quad
[Re: Bob_Coomer]
#739245
07/03/10 02:08 PM
07/03/10 02:08 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
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I Live Here
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Posts: 12,419
Kalispell Mt.
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The T-quad that is sposed tobe on there is an 850. If you put an 850 holley on there it will not run near as good. Just fix the t-quad, it will run better and get much better mpg. Remember under hood temp on a 440 running peadl to the metal in a MH is pretty high so the plastic carb will work wonders.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: best replacement carb for a thermo quad
[Re: Thumperdart]
#739246
07/03/10 05:09 PM
07/03/10 05:09 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
OP
I Live Here
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OP
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Posts: 13,247
Mt. Vernon, Ohio
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Quote:
Quote:
A well built and tuned thermo quad would be the best choice for replacement in my opinion.
I`ve built several of those for race cars,trucks and motorhomes and all worked well when tuned properly. There`s a trick to makin em work and not bog and it starts with the metering rods and ends w/the air door adjustement......and of course a few tricks in between.
That's the problem,,,I know nothing about a TQ, or the trick's to make them work right. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: best replacement carb for a thermo quad
[Re: dartman366]
#739247
07/03/10 06:11 PM
07/03/10 06:11 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOrk !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
That's the problem,,,I know nothing about a TQ, or the trick's to make them work right.
What are the probs you are having ?
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Re: best replacement carb for a thermo quad
[Re: dOrk !]
#739250
07/03/10 08:48 PM
07/03/10 08:48 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
OP
I Live Here
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OP
I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Quote:
Quote:
That's the problem,,,I know nothing about a TQ, or the trick's to make them work right.
What are the probs you are having ?
If it sit's more than a week you have to prime the carb with gas to start it, no amount of pumping the accelerator give's it enough gas to start,, act's like the bowl's are completely dry,,,won't go into 4 barrel mode when pedal is slammed to the floor, run's on 2 barrel only,,,idle adjustment screw's have no effect on idle quality,,,and it is just a scuzzy, scurvey, nasty looking mess,,I just want to make sure all is good and ready to go with the best economy that I can get from this barge.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: best replacement carb for a thermo quad
[Re: dulcich]
#739252
07/03/10 10:04 PM
07/03/10 10:04 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
OP
I Live Here
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OP
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Quote:
A better carburetor than the Thermoquad has yet to be invented. It was truely the finest moment for cabureted fuel delivery. 
-dulcich
Thank's Steve, now where is the best place to obtain info on how these thing's work and how to modify and tune them,,guess I need to start lern'in how.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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