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Which Thermoquad?
#1260482
07/01/12 09:56 PM
07/01/12 09:56 PM
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Joined: Jul 2011
Posts: 817
Eugene, Oregon
Secret Chimp
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 817
Eugene, Oregon
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I've gotten curious about Thermoquads and want to give one a try. I'm trying to find one that will run well on my engine (318 67 closed-chamber w Summit 6900) without any parts changing. I'd like to see if I get better throttle response and easier cruise tuning/economy than fidgeting with my AVS.
I've tried researching for my application, I'm a bit lost even with Vaanth's guide. With all of the different ones available on Fleabay and the like I'm really not sure what would be both a cheap & appropriate option for me. I know different years introduced different electronic emissions things that I probably don't want, but some earlier year carbs miss out on improvements done sometime in the 70s. Apparently some but not all later-70s carbs have a limiter or cap on the metering tree adjuster which kind of defeats one of my goals, etc.
What should I be setting my sights on?
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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Re: Which Thermoquad?
[Re: Secret Chimp]
#1260483
07/01/12 09:59 PM
07/01/12 09:59 PM
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Joined: Mar 2005
Posts: 862
Iowa State fan
kilroy
super stock
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super stock
Joined: Mar 2005
Posts: 862
Iowa State fan
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ANY of the 6000's series carbs. The metering rods w/ the 1966# on them are suppose to be the best starting point. Be careful with a first time removing the idle mixture screws on a carb that hasnt been used in a while, they are usually stuck and will break off.
1973 Charger, former SE, former auto
I'm not trying to be difficult, it comes naturally....
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Re: Which Thermoquad?
[Re: Secret Chimp]
#1260485
07/01/12 10:49 PM
07/01/12 10:49 PM
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Joined: Mar 2005
Posts: 862
Iowa State fan
kilroy
super stock
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super stock
Joined: Mar 2005
Posts: 862
Iowa State fan
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Quote:
Everybody seems to be selling 9000 series. This is the typical "deal" I'm finding:
http://www.ebay.com/itm/1973-6324S-1083-...r#ht_2116wt_956
Is that what I ought to expect when looking for 6000s?
Yep, looks about right.
Personally I wouldnt pay that much (because Im a cheapass)but I do love me some TQs. 9000s can be made to work, but are generally loaded down with extra emissions equipment and you have to know what to tune,cover,remove to make those carb work. I find about 1 6000's series for every 5 9000's series. You can still find them at swap meets (all series) for $5-$40 with most around $25. This will also be where you get your spare parts. Lots of good threads on here would be gald to post them for you, all sorts of things covered.
Last edited by kilroy; 07/01/12 10:59 PM.
1973 Charger, former SE, former auto
I'm not trying to be difficult, it comes naturally....
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Re: Which Thermoquad?
[Re: Secret Chimp]
#1260488
07/02/12 09:29 AM
07/02/12 09:29 AM
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Joined: May 2009
Posts: 409
Lexington NC
twinscrew698
mopar
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mopar
Joined: May 2009
Posts: 409
Lexington NC
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Quote:
Quote:
One word: Demonsizzler
Isn't he out of the business or something?
I thought I read an inquiry a few months ago about where he was and a friend/forum member said he'd sold all of his stuff.
His web site is down!
Members had trouble getting a hold of him!
Might wanna try http://harmsauto.com/
Scottsmith Harms is a member here!
Quality work of what i have seen!
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Re: Which Thermoquad?
[Re: twinscrew698]
#1260489
07/02/12 11:13 AM
07/02/12 11:13 AM
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Joined: Jul 2011
Posts: 817
Eugene, Oregon
Secret Chimp
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 817
Eugene, Oregon
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Quote:
Quote:
Quote:
One word: Demonsizzler
Isn't he out of the business or something?
I thought I read an inquiry a few months ago about where he was and a friend/forum member said he'd sold all of his stuff.
His web site is down!
Members had trouble getting a hold of him!
Might wanna try http://harmsauto.com/
Scottsmith Harms is a member here!
Quality work of what i have seen!
I'd love to get a TQ done by Scott, but if I had that kind of money to throw at my car I'd have a lot less questions to ask 
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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Re: Which Thermoquad?
[Re: 77ProStreet]
#1260492
07/02/12 03:47 PM
07/02/12 03:47 PM
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Joined: Jul 2011
Posts: 817
Eugene, Oregon
Secret Chimp
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 817
Eugene, Oregon
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Would something like this work, or is it on the wrong edge of emissions? http://www.ebay.com/itm/CARTER-THERMOQUA...tr#ht_500wt_971
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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Re: Which Thermoquad?
[Re: 77ProStreet]
#1260493
07/02/12 03:48 PM
07/02/12 03:48 PM
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Joined: Jul 2011
Posts: 817
Eugene, Oregon
Secret Chimp
OP
super stock
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OP
super stock
Joined: Jul 2011
Posts: 817
Eugene, Oregon
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Quote:
Pretty much any early pre smog TQ 6000/9000 series will work well on your small block, I have some good cores on hand, If it helps your budget amy you buy the restoration I'll give you a free core (I have several early 70's 340/360 #s on hand). Good luck either way 
Thanks for the offer, not calling your prices steep, I'm just poor
Quote:
Hey Secret Chimp, I see you are in Bothell. There is a local guy in Arlington that is AWESOME with TQ's. He has done several for me and just built one for my MH. That one cost me $275. He loves TQ's and has a stockpile of them even the 1000 cfm ones. PM me and can get you his #.
Nice, PM sent
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
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Re: Which Thermoquad?
[Re: twinscrew698]
#1260497
07/03/12 09:35 AM
07/03/12 09:35 AM
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Joined: Mar 2005
Posts: 862
Iowa State fan
kilroy
super stock
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super stock
Joined: Mar 2005
Posts: 862
Iowa State fan
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I would say the above post is conditional.
If you like to work on your stuff, the problems you here about with TQs are not big issues at all and you will find them easier to work on than people claim.
If you like the hobby but dont really want to understand the system or think tearing into a carburetor would be over your head, then yes, you may be money ahead to have a guy like Scott rebuild and set it up for you.
The intial evaluation of the carb as it comes apart will tell you a lot. Is it missing any parts you dont have, is it seized, etc.
1973 Charger, former SE, former auto
I'm not trying to be difficult, it comes naturally....
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Re: Which Thermoquad?
[Re: kilroy]
#1260498
07/04/12 06:47 AM
07/04/12 06:47 AM
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Joined: May 2009
Posts: 409
Lexington NC
twinscrew698
mopar
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mopar
Joined: May 2009
Posts: 409
Lexington NC
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Quote:
I would say the above post is conditional.
If you like to work on your stuff, the problems you here about with TQs are not big issues at all and you will find them easier to work on than people claim.
If you like the hobby but dont really want to understand the system or think tearing into a carburetor would be over your head, then yes, you may be money ahead to have a guy like Scott rebuild and set it up for you.
The intial evaluation of the carb as it comes apart will tell you a lot. Is it missing any parts you dont have, is it seized, etc.
I agree!I have taken my Thermoquad apart many of times and have no problem of doing it again,thats how we learn!
It was a lot less complicated than i thought once i got in to it!
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Re: Which Thermoquad?
[Re: ScottSmith_Harms]
#1260501
07/04/12 02:12 PM
07/04/12 02:12 PM
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Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
Rug_Trucker
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,610
Not2farfromNashville, TN
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There is an after market 9000 series. 9801-9800's.
Keep in mind our resident "mileage master" used a 850 sized TQ on his 318. I forget what model it was. (Maybe a 400HP carb?)
The one you showed on Ebay is a carb with an altitude compensator.
I own 30 TQ cores. All of them will require the primary throttle shaft to be bushed. Unless you have to tools to do it? You might have to hire someone to do that.
If anyone needs to get one of Doc's air door tools I can try contacting him. I have his number and email.
"The only thing to do for triumph of evil is for good men to do nothing"
"NUNQUAM NON PARATUS!"
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