? for DWC43

[moparots]

Hey DWC, Im asking you because you are the "guru" of Thermoquads.... I am thinking of buying a 850 cfm thermoquad for my built 360. My question is, do you think 850 is too much for this motor. Its got an 750 Edelbrock on it now but its old and LEAKS and has NO throttle response. any suggestions? PLEASE any one leave comments, not just ole DWC. Thanks alot in advance

[rumblefish360]

He is far from "Guru" on T-Q's.
You want guru, I'll give you guru.
Talk to my main man Dave. He'll set you straight and set you up.
And no, an 850 is not to big.

You want the best you got the best, click here and don't look back;
http://www.thermoquads.com/
And tell'em rumblefish sent ya!

[TK]

Originally Posted by rumblefish360

He is far from "Guru" on T-Q's.
You want guru, I'll give you guru.
Talk to my main man Dave. He'll set you straight and set you up.
And no, an 850 is not to big.

You want the best you got the best, click here and don't look back;
http://www.thermoquads.com/
And tell'em rumblefish sent ya!

GRUMBLEFISH HAS SPOKEN!

ALL HAIL GRUMBLEFISH!

[George G. Leverette]

Thermoquads are my favorite carb, the 850 will only come in at 80% throttle travel so most of the time you are operating the small primaries. The T. Q. was used on 318s thru 440 engines and performed well in all applications. Rebuilts are available through most parts houses and the ones from Champion perform well from personal experience.

[rumblefish360]

Originally Posted by dodgetruckboy

GRUMBLEFISH HAS SPOKEN!

ALL HAIL GRUMBLEFISH!

Like George said, there small primarys are about 200 cfm and have great velocity to atomize the fuel. This means good mileage and emissions (If need be) and the huge secondarys for great W.O.T. acceleration.
I have a fondness for these carbs as well.
Hardest thing about these carbs are parts. Dave (Click above link) has many parts for them.
If you don't mind cutting and bending AFB rods tro fit, tuning becomes easier.

[TrashedCharger]

You want guru, go ask one of the technicians or better yet, ask one of the engineers from Weber/Carter about the carburetor.

Nobody on this website is a guru of anything including me, As far as I'm concerned. Gather information from proven sources and make a decision based on collective data and practicality according to your vehicles needs and the type of use you plan on putting your vehicle through.

The ThermoQuad carburetors are never flow rated at an even number of cubic feet per minute as you have stated. They are always rated at an odd number of CFM. The Carburetor you are talking about will work on your 360.

ThermoQuad carburetors will never allow more fuel than needed at wide open throttle. This is due to the tunable rear air door and fuel delivery rods and lack of having any rear jetting or metering rods. As the secondary air door is opened as needed, the velocity pulls more fuel from the delivery tubes as needed and creates the correct air to fuel ratio depending on the spring tension/ opened position of the secondary air door that you set it to.

There are more and more parts becoming available for these carburetors and if you have the parts and the patience to rebuild and tune one of them for your engine, you will be happy with it.

[moparots]

Hey all, Thanks so much for all the info. I think yall took the "Guru" thing a little too serious I thought of it and mentioned DWC because I must have read on some other thread the Thermoquad was his carb of choice.

I believe I will get one, but first Im going to get more info on rebuilding before I decide to get one rebuilt or do it myself.

Were these carbs stock on cars from the 70s?



Thanks again............Craig

[rumblefish360]

They debuead in '71. The first year is a oddball in it's metering. Use all other years.
Earlier the better.
There is a book on Carter Carbs that outlines all of the 4bbls used. While not a book for dummy's, it'll show you what you need to know. A helpful hint I give to you is to take some pictures of the carb before and during disassembly to help out the rebuild.
This will help in the reassembly of the carb later.

[dwc43]

Originally Posted by TrashedCharger

You want guru, go ask one of the technicians or better yet, ask one of the engineers from Weber/Carter about the carburetor.

Nobody on this website is a guru of anything including me, As far as I'm concerned. Gather information from proven sources and make a decision based on collective data and practicality according to your vehicles needs and the type of use you plan on putting your vehicle through.

The ThermoQuad carburetors are never flow rated at an even number of cubic feet per minute as you have stated. They are always rated at an odd number of CFM. The Carburetor you are talking about will work on your 360.

ThermoQuad carburetors will never allow more fuel than needed at wide open throttle. This is due to the tunable rear air door and fuel delivery rods and lack of having any rear jetting or metering rods. As the secondary air door is opened as needed, the velocity pulls more fuel from the delivery tubes as needed and creates the correct air to fuel ratio depending on the spring tension/ opened position of the secondary air door that you set it to.

There are more and more parts becoming available for these carburetors and if you have the parts and the patience to rebuild and tune one of them for your engine, you will be happy with it.

They have rear jets and they are rated at 800 for small blocks and 850 for big blocks.

[dwc43]

Originally Posted by moparots

Hey all, Thanks so much for all the info. I think yall took the "Guru" thing a little too serious I thought of it and mentioned DWC because I must have read on some other thread the Thermoquad was his carb of choice.

I believe I will get one, but first Im going to get more info on rebuilding before I decide to get one rebuilt or do it myself.

Were these carbs stock on cars from the 70s?



Thanks again............Craig

We run them all the time on most everything. I have two on a tunel rammed big block too. We used the big block 850 carb on the 365 dirt track engines. Either will be fine on yours. If you need any help building yours, just send me an e mail. Last one I bought new from Advance auto was $189, but they may have gone up by now. That's been a while, and I have extras on the shelf, so I have not bought any lately.

[dwc43]

Originally Posted by rumblefish360

He is far from "Guru" on T-Q's.
You want guru, I'll give you guru.

BITE ME !!

[ehostler]

Originally Posted by dwc43

Last one I bought new from Advance auto was $189, but they may have gone up by now.

Why do you keep saying that Advance is selling NEW Thermoquads? They are selling remanufactured (rebuilt) thermoquads.

[dwc43]

Because Holley builds them new. No old parts.

[ehostler]

Sorry, Carter still holds the rights to the name. Holley may be remanufacturing a TQ, however they are not making new TQs.

[rumblefish360]

Originally Posted by dwc43

BITE ME !!

ehostler has a point. Theres new bowls out there and rods and jets can be had. I had been quoted out-of this planet prices that make gas cheaper than salt water from the carb shop. Screw them.
Small parts can be had.

I have not seen anybody make the tops or bottoms.

[dwc43]

Carter does not exist and owns no rights. Fedral Mogual bought them years ago, then edel junk bought them, and I guess Holley has them now.

[cutting torch]

I think weber was mixed in there somewhere, too.

torch

[dwc43]

Originally Posted by cutting torch

I think weber was mixed in there somewhere, too.

torch

I think that was Holley and Weber that did some carbs together. Like the 2.2 carbs for one.

[ehostler]

Actuall, the carter name is now owned by Federal Mogul. They bought the name and all rights that went with it. Federal Mogul sold the AFB and AVS designs to EB. Now Weber makes the EB carbs.

Even you have admitted in the past that thos are remanufactured carbs.

Also, if Holley had purchased the TQ rights and started making TQ carbs, don't you think they would list them on their website?

[TK]

Originally Posted by dwc43

Carter does not exist and owns no rights. Fedral Mogual bought them years ago, then edel junk bought them, and I guess Holley has them now.

stuff the edeljunk thermoterd boy!

not to change the subject, but where did Walbro come in? My new edelbrock sais Walbro on it.

[turbododge]

I just looked up a typical TQ on the Advance website and it said it was a "Champion" remanufactured at $185 + $20 core charge. No new ones listed.

[rumblefish360]

Big E has the story right.

[Rug_Trucker]

I bought a Champion as they didn't require a core charge. Throttle shaft was sloppy and it caused problems. (vac leak) Holley rebuilds them, and also Tomco? There is someone else doing them too.

Here is a place to check things TQ's were actually started in the 60's.
http://www.geocities.com/tv_larsen/v...quad_guide.txt

Summit or Amazon sell the Carter carb book by Dave Emanuel.
DWC you need to stop putting your foot into your mouth!

Now who here was saying these don't have secondary jets? Was it this post or another?

For some stupid reason I can't get that link to com out duplicate it with thermoquad spelled out or do a Vaanth TQ carb search.

[ehostler]

You missed a hyphen. It's http://www.geocities.com/tv_larsen/v...quad_guide.txt

[ehostler]

Also, don't forget, Demon Sizzler wrote a great tutorial that is in the tech archives. ThermoQuads 101

[rumblefish360]

Originally Posted by Rug_Trucker

Now who here was saying these don't have secondary jets? Was it this post or another?

I was saying that the carb shop offered me secondary jets at out of this world prices. I do not know where to find them cheap. (Rods & Jets in general.)

[ehostler]

Strip kits - http://www.thecarburetorshop.com/Perfparts.htm

[dwc43]

Originally Posted by Rug_Trucker

I bought a Champion as they didn't require a core charge. Throttle shaft was sloppy and it caused problems. (vac leak) Holley rebuilds them, and also Tomco? There is someone else doing them too.

Here is a place to check things TQ's were actually started in the 60's.
http://www.geocities.com/tv_larsen/v...quad_guide.txt

Summit or Amazon sell the Carter carb book by Dave Emanuel.
DWC you need to stop putting your foot into your mouth!

Now who here was saying these don't have secondary jets? Was it this post or another?

For some stupid reason I can't get that link to com out duplicate it with thermoquad spelled out or do a Vaanth TQ carb search.

I don't intend to and the TQ came out in '71, not the '60's.

[ehostler]

Actually, they were not used on production vehicles until 1971. They had been in use on race engines since 1969.

And yes, it is obvious that you don't intend to stop putting your foot in your mouth.

[rumblefish360]

Originally Posted by ehostler

Actually, they were not used on production vehicles until 1971. They had been in use on race engines since 1969.

And yes, it is obvious that you don't intend to stop putting your foot in your mouth.

I thought it was '68. Non the less.......