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Re: I really want the Thermoquad sound but should I? [Re: ] #2678666
07/18/19 12:59 PM
07/18/19 12:59 PM
Joined: Jan 2003
Posts: 8,390
Highland, MI.
Sunroofcuda Offline
master
Sunroofcuda  Offline
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Joined: Jan 2003
Posts: 8,390
Highland, MI.
Originally Posted by RWG75
Originally Posted by feets
Originally Posted by RWG75
My vote is go with the TQ but ya can't really go by me - I'm running (4) of them. What year Imp are ya working on?


It's a large by huge 72 Imperial crew cab.


As opposed to those tiny coupes?

When it comes to big barges the fuselage ones have always been my faves. 70 ish 300 drop top on the bucket list. TQs really fit the luxo cruiser well - mild and quiet when running on just the primaries, terrifying in a refined and civilized way when you hold them all the way open. Depends on the gear. Later Imps had higher gears and I've driven a couple 74s and 75s that would shift in to 3rd around 80 mph. About the time the passengers start getting uncomfortable about how wound up the big block is and wondering if it will ever shift, it does and they really start to worry because it's still pulling like an aircraft tug.


Agreed, on an automatic car the downshift combined with the T-Quad opening the massive secondaries is an intimidating sound.


No Man With A Good Car Needs To Be Justified
Re: I really want the Thermoquad sound but should I? [Re: Sunroofcuda] #2678713
07/18/19 02:44 PM
07/18/19 02:44 PM
Joined: Jan 2003
Posts: 16,802
Between Houston & Galveston TX
SattyNoCar Offline
Smarter than no class Flappergass by a mile
SattyNoCar  Offline
Smarter than no class Flappergass by a mile

Joined: Jan 2003
Posts: 16,802
Between Houston & Galveston TX

Agreed, on an automatic car the downshift combined with the T-Quad opening the massive secondaries is an intimidating sound

Yeah, just ask the Illinois Nazis........ biggrin


John

The dream is dead, long live the dream.......😥
Re: I really want the Thermoquad sound but should I? [Re: feets] #2678722
07/18/19 03:15 PM
07/18/19 03:15 PM
Joined: Feb 2011
Posts: 211
Halifax, VA.
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moparjack44 Offline
enthusiast
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Joined: Feb 2011
Posts: 211
Halifax, VA.
Originally Posted by feets
I'm starting to make time to put the Imperial's 440 together. The original plan was to inject it but I think I'm going to go with a carb for a while. That would get me on the road quicker and allow me to use the extra funds for other stuff on the car.
I've been looking at the Street Demon and my CH4B.

The engine is built for low to mid-range torque with 10.2:1 compression, Eddy heads, and a mild cam. The old Desktop Dyno software suggested the build would make 460+ lb/ft from 2000 - 5000 with a peak nudging 500 lb/ft. HP would top out around 440. It's a 5300 lb car with a 3.23 gear and 29" tires.

So, assuming I can turn 400 lb/ft at the wheels to get this fatty cruising effortlessly down the highway, should I do it with a reman TQ and different intake or stick with the Street Demon and CH4B? Sadly, I don't have hood clearance for a Performer RPM or carb spacer.

My first car was a 74 RR with a 360 and I miss the sound of that Thermoquad at full gallop. The Imperial is very quiet and that howl would add that extra little touch that the old beasts need.


Can you still get TQ's? I used to have a basket full, eventally gave them all away down Is there room for dual set up on Weiand intanke on first Gen 392?


K.I.S.S.
Re: I really want the Thermoquad sound but should I? [Re: moparjack44] #2678737
07/18/19 04:20 PM
07/18/19 04:20 PM
Joined: May 2019
Posts: 6,174
nowhere
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Sniper Offline
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Sniper  Offline
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S

Joined: May 2019
Posts: 6,174
nowhere
You can get remans from Rockauto

An OEM style choke will be an issue though there are electric conversions out there.

Re: I really want the Thermoquad sound but should I? [Re: 2boltmain] #2678926
07/19/19 01:51 AM
07/19/19 01:51 AM
Joined: Jan 2003
Posts: 27,421
Balt. Md
3
383man Offline
Too Many Posts
383man  Offline
Too Many Posts
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Posts: 27,421
Balt. Md
Originally Posted by 2boltmain
Might as well try the new Street Demon
. It gets great reviews and its design takes the best attributes of the Thermoquad , Quadra jet and AFB and puts it into an all new carburetor.



Is that the one that is kinda square looking and is like the Thermoquad ?? Also I remember guys turning the air cleaner lid upside down to have about a 1/4" to 1/2" open space around the air cleaner edge as it really woke up that suction sound where it sounded like it wanted to suck the hood into the eng. It was mostly guys with the Quadrajet that did that as there was many more of them around then Thermoquads but the are like the Thermoquad with large secondaries and small primaries. Ron

Re: I really want the Thermoquad sound but should I? [Re: 2boltmain] #2678935
07/19/19 03:28 AM
07/19/19 03:28 AM
Joined: Jan 2003
Posts: 28,576
Shopping @ HoBo Fright
340SIX Offline
Doc Flappergas's Evil Twin
340SIX  Offline
Doc Flappergas's Evil Twin

Joined: Jan 2003
Posts: 28,576
Shopping @ HoBo Fright
My 1st V8 car was,,h code 340 with 727. A friend of my brother gout in 95 per cent shape. But slowly ruined it. So 340 727 323 sure grip with rally pack dealer AC was a great car. Ran well with the factory TQ Carb. Screemed with the lid upside down. And g
Had great milage.


[img]https://i234.photobucket.com/albums/ee87/fast340six/sig%20pics/2840886-340SIX-1.jpg[/img]
VP of the MPM in New Orleans
73 Dart Sport 340/ 70 challenger vert. That may still get built, If I live long enough
Re: I really want the Thermoquad sound but should I? [Re: moparjack44] #2679024
07/19/19 10:33 AM
07/19/19 10:33 AM
Joined: Feb 2011
Posts: 211
Halifax, VA.
M
moparjack44 Offline
enthusiast
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M

Joined: Feb 2011
Posts: 211
Halifax, VA.
Originally Posted by moparjack44
Originally Posted by feets
I'm starting to make time to put the Imperial's 440 together. The original plan was to inject it but I think I'm going to go with a carb for a while. That would get me on the road quicker and allow me to use the extra funds for other stuff on the car.
I've been looking at the Street Demon and my CH4B.

The engine is built for low to mid-range torque with 10.2:1 compression, Eddy heads, and a mild cam. The old Desktop Dyno software suggested the build would make 460+ lb/ft from 2000 - 5000 with a peak nudging 500 lb/ft. HP would top out around 440. It's a 5300 lb car with a 3.23 gear and 29" tires.

So, assuming I can turn 400 lb/ft at the wheels to get this fatty cruising effortlessly down the highway, should I do it with a reman TQ and different intake or stick with the Street Demon and CH4B? Sadly, I don't have hood clearance for a Performer RPM or carb spacer.

My first car was a 74 RR with a 360 and I miss the sound of that Thermoquad at full gallop. The Imperial is very quiet and that howl would add that extra little touch that the old beasts need.


Can you still get TQ's? I used to have a basket full, eventally gave them all away down Is there room for dual set up on Weiand intanke on first Gen 392?


O heck. After some "research" I find that smallest CFM on Thermoquad is 800. Too much for my 2 4 set up on my 1st Gen 392, so reckon I am SOL. I had gotten excited about running a Thermoquad (actually 2) again. I know that a single Thermo is better than my 2 500CFM Edbrocks set up, but sometimes you just gotta go with the WOW!!! factor of 2 instead of 1 cool.


K.I.S.S.
Re: I really want the Thermoquad sound but should I? [Re: moparjack44] #2679041
07/19/19 11:15 AM
07/19/19 11:15 AM

R
RWG75
Unregistered
RWG75
Unregistered
R



I don't trust reman TQs from anywhere except my bench. Have seen too many of them fouled up and no surprise as they're not exactly easy to set up. Ok, was one guy that did them for years and knew his thing but he's pretty much faded. The last few I build for myself were ebay $50 ish basket cases, some parts from my stash and a few bits from quadrajetparts.com Nice thing about that site is ya can buy the 4 parts you need for 1/3 the cost of a generic rebuild kit with a bunch of parts you don't need.

As far as I know, the CFM rating is what they're capable of inhaling and it only comes in to play when your engine is trying to gulp more than what it can suck through the carb. Basic example is that TQs came in 800 (early) and 850 (most) versions and Chrysler used them as OEM on 318s which clearly wouldn't need all that air. The trick, and the cool thing about TQs, is mix and match rods and jets until you get the net fuel rate that works with your engine.

Re: I really want the Thermoquad sound but should I? [Re: ] #2679159
07/19/19 04:51 PM
07/19/19 04:51 PM
Joined: Jan 2007
Posts: 953
Badham Co.
Y
Y3 70 BEE Offline
super stock
Y3 70 BEE  Offline
super stock
Y

Joined: Jan 2007
Posts: 953
Badham Co.
Leather acc pump from Quadrajet parts works great too.

Re: I really want the Thermoquad sound but should I? [Re: Y3 70 BEE] #2679319
07/20/19 07:46 AM
07/20/19 07:46 AM
Joined: Sep 2005
Posts: 620
Deep DEEP SOUTH
LAD 524 Offline
mopar
LAD 524  Offline
mopar

Joined: Sep 2005
Posts: 620
Deep DEEP SOUTH
I wanna try out this combo for fun once I get my new hood. Ive prepped up a pair of #6322 TQs with some tweaks, freshened them up and put in new throttle shaft bushing.

VERY interested to see how they will dial in on the X ram laugh

[Linked Image]

Re: I really want the Thermoquad sound but should I? [Re: LAD 524] #2679324
07/20/19 08:30 AM
07/20/19 08:30 AM
Joined: Feb 2003
Posts: 7,979
Scranton, PA
Montclaire Offline
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Montclaire  Offline
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Posts: 7,979
Scranton, PA
I've been toying with the idea of running a TQ myself but I don't know if I want the headache. It sounds like getting one of them dialed in is bordering on voodoo, plus you have to scrounge a good used one and hope whoever rebuilds it knows what they're doing.

Re: I really want the Thermoquad sound but should I? [Re: Montclaire] #2679330
07/20/19 08:47 AM
07/20/19 08:47 AM
Joined: Jan 2003
Posts: 42,714
Spokane Washington
ScottSmith_Harms Offline
Mr Wizzard
ScottSmith_Harms  Offline
Mr Wizzard

Joined: Jan 2003
Posts: 42,714
Spokane Washington
Thermoquads are not difficult to build at all, in fact, they are quite simple, I have several on my personal cars and build a ton of them. The biggest problems I see with them are when backyard engineers think that they are smarter than the engineers who designed them and start modifying them "To make them better". Bottom line? There is no "Voodoo", you simply need to learn how to adjust one properly which is also easy if you can read a technical manual and follow instructions. No, they are not the same as a Holley, so if that's all a person has ever messed with you'll need to open your mind and learn something new. not a big deal for most people who can turn a wrench. A good place to start is a factory service manual, there is also a good tutorial on the Imperial Club website. Imperial Club Site Link Here

20180404_174130.jpg
Re: I really want the Thermoquad sound but should I? [Re: ScottSmith_Harms] #2679342
07/20/19 09:30 AM
07/20/19 09:30 AM
Joined: Feb 2005
Posts: 4,309
Prospect, PA
BSB67 Offline
master
BSB67  Offline
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Prospect, PA
Scott - That is truly a thing of beauty.

Re: I really want the Thermoquad sound but should I? [Re: BSB67] #2679389
07/20/19 11:21 AM
07/20/19 11:21 AM

R
RWG75
Unregistered
RWG75
Unregistered
R



I can't say I've often heard TQs described as simple. As for voodoo, that's no help. Perhaps the be best analogy here is women - they make a lot more sense when you understand how they work. I've always said that the linkages connecting the choke, choke pull off, fast idle cam and secondary air door is a design Rube Goldberg would be proud of. The subtitles of It are under documented and your best help there is another correctly set up one for reference. The frequently misunderstood thing is the relationship between curb idle throttle setting, curb idle mix setting and meter rod yoke height. The last one being the most important part of the carbs designed in flexibility and a thing many people screw up and then try to compensate for by screwing up the other adjustments.

Re: I really want the Thermoquad sound but should I? [Re: ] #2679405
07/20/19 12:19 PM
07/20/19 12:19 PM
Joined: May 2019
Posts: 6,174
nowhere
S
Sniper Offline
master
Sniper  Offline
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S

Joined: May 2019
Posts: 6,174
nowhere
Best argument yet


Re: I really want the Thermoquad sound but should I? [Re: Sniper] #2679428
07/20/19 01:26 PM
07/20/19 01:26 PM
Joined: Jan 2003
Posts: 10,630
S.E.Ohio
Magnumguy Offline
I Live Here
Magnumguy  Offline
I Live Here

Joined: Jan 2003
Posts: 10,630
S.E.Ohio
I know of a Ken Manley ( he's on Facepage laugh ) and RWG75 that rebuilds them.

Oh, and ~Yes~ Go for it


"Multiple Magnum owner since 1978!!"


https://www.facebook.com/groups/146952895354657/
Re: I really want the Thermoquad sound but should I? [Re: Magnumguy] #2679476
07/20/19 03:52 PM
07/20/19 03:52 PM
Joined: Jul 2005
Posts: 1,499
Slidell, LA
Plum440 Offline
pro stock
Plum440  Offline
pro stock

Joined: Jul 2005
Posts: 1,499
Slidell, LA
Just installed the Street Demon on my 440 and....WOW! Car has never ran better or sounded as good. Quick throttle response and steady RPMs. I can't say enough good things about it. Will never go back to the Edelbrock. twocents


70 Challenger, 440, 4-speed, pLuM cRaZy
71 VW Super Beetle Convertible, Lemon Yellow
A couple of Jeeps…


Re: I really want the Thermoquad sound but should I? [Re: Plum440] #2679482
07/20/19 04:22 PM
07/20/19 04:22 PM
Joined: Jan 2003
Posts: 42,714
Spokane Washington
ScottSmith_Harms Offline
Mr Wizzard
ScottSmith_Harms  Offline
Mr Wizzard

Joined: Jan 2003
Posts: 42,714
Spokane Washington
This pic is the same carb pictured above before final assembly. A lot of the rebuilders out there don't take them down this far and leave the throttle shafts in them, and rather than replating the linkage and small parts they paint them to doll them up. When torn down 100% they can look intimidating, and sure, they are different but are really no more complex than other Carter or Holley 4 barrels.

Thermoquad pre assembly.jpg
Re: I really want the Thermoquad sound but should I? [Re: Sniper] #2679578
07/20/19 10:03 PM
07/20/19 10:03 PM
Joined: Jan 2003
Posts: 3,704
MICHIGAN
DynoDave Offline
master
DynoDave  Offline
master

Joined: Jan 2003
Posts: 3,704
MICHIGAN
Originally Posted by Sniper
Best argument yet



Love it!


DynoDave
Walter P. Chrysler Club - Great Lakes Region
Member # 12304
1970 Plymouth Duster
1972 Dodge Charger Rallye
https://wichargerguy.proboards.com/
1977 Chrysler Cordoba
Re: I really want the Thermoquad sound but should I? [Re: DynoDave] #2679616
07/21/19 12:39 AM
07/21/19 12:39 AM
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
Kern Dog Offline
Striving for excellence
Kern Dog  Offline
Striving for excellence

Joined: Feb 2010
Posts: 18,493
Granite Bay CA
Steve Dulcich:

Mopar 01.jpg
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