MoparFins

Techical Discussions => Tech- - FUEL => Topic started by: Stan Paralikis on August 08, 2008, 12:04:27 PM

Title: Thermoquad - what to do
Post by: Stan Paralikis on August 08, 2008, 12:04:27 PM
I have an extra Thermoquad sitting on the bench now as we speak (thanks, Lance).  Right now, The Nyb is averaging about 9 MPG and it's not exactly the smoothest running 440.
I haven't touched the engine since she came home to papa after sitting for ten years in a museum. The next phase for The Nyb is a complete and thorough A-Z tuneup.    I'm trying to figure out what to do about the Thermoquad as part of the tuneup.Commando12008-08-08 17:07:22
Title: Thermoquad - what to do
Post by: Ken on August 08, 2008, 02:17:23 PM
#2  You can do it and do it right. (http://www.moparfins.com/forum/smileys/smiley20.gif)

Title: Thermoquad - what to do
Post by: Matt Aker on August 08, 2008, 02:49:16 PM
TQ's aren't too difficult to rebuild.  They're a little more involved than an AFB, but I've rebuilt a few TQ's with no issues and good results.
 
You can do it Stan! (http://moparfins.com/forum/smileys/smiley32.gif)
Title: Thermoquad - what to do
Post by: Steve on August 08, 2008, 03:23:46 PM
Corey could use a few bucks.  He knows TQ's. . . He did a great job on a carb for me last year and I have 3 to send him.  One is for him to keep.  Send it out to him!  He wasn't expensive either.
 
Which car is this?
Title: Thermoquad - what to do
Post by: Brian on August 08, 2008, 09:53:36 PM
Get a rebuild kit and give it a redo...they are great carb once set-up.
 
They are, as stated above, a little more involved than the AVS/AFB carters but they have a lot more fine tunning available with basic adjustments.  
 
Just make sure you follow the directions to the letter adn millimeter when adjusting the linkage and other rod settings and suck and you should have very few problems if any.
 
 
Title: Thermoquad - what to do
Post by: Stan Paralikis on August 09, 2008, 03:48:24 AM
Quote from: POLARACO
Corey could use a few bucks.  He knows TQ's. . . He did a great job on a carb for me last year and I have 3 to send him.  One is for him to keep.  Send it out to him!  He wasn't expensive either.
I didn't know that. (http://www.moparfins.com/forum/smileys/smiley32.gif)
Corey: give me the info I need to send it off to you.
I really liked this part: "He wasn't expensive either"  (http://www.moparfins.com/forum/smileys/smiley17.gif)
This is for The Nyb. The '76 white one.
NYB #2 is going to a new home I think soon....(http://www.moparfins.com/forum/smileys/smiley2.gif)
Title: Thermoquad - what to do
Post by: Snotty on August 09, 2008, 06:01:45 PM
I'm the contrarion here.  The key phrase involving a TQ is "when they're set up right."
 
Go with an Eddy and have no more troubles.
Title: Thermoquad - what to do
Post by: Brian on August 09, 2008, 06:30:49 PM
Quote from: Snotty
I'm the contrarion here.  The key phrase involving a TQ is "when they're set up right."
 
But you can't really set one up properly until it's on a running motor...I have bought "reman" units that wouldn't even get me out of the driveway...had to pull them apart and reset everything to stock setting, then I could adjust it to the motor.
 
Both my 360 and my 440 run like they have EFI...the cars start with one or two pumps in the morning then run strong and smooth through the choke cycle then drop off when warmed up  and run like a champ all day long.....(http://www.moparfins.com/forum/smileys/smiley4.gif)
 
Title: Thermoquad - what to do
Post by: Stan Paralikis on August 10, 2008, 01:42:10 AM
Quote from: thrashingcows
Quote from: Snotty
I'm the contrarion here.  The key phrase involving a TQ is "when they're set up right."  
 But you can't really set one up properly until it's on a running motor...I
BINGO!
I have bought enough Holleys (the good years) and Eddies over the years to put someone's kid through college.
And I have yet to have one run smoothly straight out of the box.
Title: Thermoquad - what to do
Post by: Steve on August 10, 2008, 03:56:10 AM
Or the Holly last the life of the motor
Title: Thermoquad - what to do
Post by: Leaburn Patey on August 10, 2008, 05:33:40 AM
As much as I love the performance and fuel economy of a Thermoquad,most are 30 + years old and getting a really good one out of the box is a crap shoot. 
The most desirable TQ would be the 73-74 850 CFM big block ones that do not have the LeanBurn crap on them..
Plus they have brass floats and are set to run at 14:1 a/f mixture.
The LeanBurn TQ's are set up to run a super lean 18:1 a/f,and have a funky idle curcuit.
TQ's are easy to set up,yet they are the most misunderstood carbs out there.If not built and set up right,they can give you migrains.
My choice would be the Edelbrock carb.Get one brandy new,easy set up and go!
 
Title: Thermoquad - what to do
Post by: Stitcherbob on August 10, 2008, 06:58:05 AM
Nuthin like the sound of a TQ at full throttle!

Title: Thermoquad - what to do
Post by: Corey on August 10, 2008, 05:45:35 PM
All i have to say is that before the fury roast i took  my car out for a run with the TQ i have on it and i tell you what talk about thottle response it was great and the car never kicked down i would go from like 65 to 90 in a mater of seconds and i figured i would have to have the tranny kick down to get that.
 
 
BTW i noticed the poll was missing one more response.
 
stinger11702008-08-10 22:48:12
Title: Thermoquad - what to do
Post by: Snotty on August 10, 2008, 05:47:56 PM
Oh, I don't know; a Quadrojet sounds good.  However, I don't want a carb to sound good, I want it to run good.  I've had better luck with Eddy's than with any stock carb, period.
Title: Thermoquad - what to do
Post by: Stan Paralikis on August 11, 2008, 01:22:18 AM
I talked with a previously mentioned Fins member and I'm going to send it off to him.
I'll plop it on and see how she runs.  If it's as good as new, he'll have my utmost gratitude.
If it's a "stumbler", I'll "out" him in front of everyone.  (http://www.moparfins.com/forum/smileys/smiley36.gif)


Just kidding.  Seriously, I appreciate how everyone here chips in to help each other out.

Title: Thermoquad - what to do
Post by: Johnny D. on August 11, 2008, 10:20:57 AM
I had one of those 850 honker TQs on my 74 New Yorker Brougham...

it was an awesome sound....  but it was warped and so i achieved about 3 mpg...


Title: Thermoquad - what to do
Post by: Matt Aker on August 11, 2008, 10:22:58 AM
Was that with the air cleaner lid upside down?
Title: Thermoquad - what to do
Post by: Steve on August 11, 2008, 12:01:35 PM
He likes to hear the carb sucking air.  "Oh but I don't drive it hard". . .  Uh Huh
Title: Thermoquad - what to do
Post by: Johnny D. on August 12, 2008, 05:57:26 PM
no actually i didnt know about flipped lids till i heard about it from stitcher!




Title: Thermoquad - what to do
Post by: Stitcherbob on August 12, 2008, 06:43:05 PM

"Do not attempt this at home"......(http://www.moparfins.com/forum/smileys/smiley2.gif)
stitcherbob2008-08-12 23:44:02
Title: Thermoquad - what to do
Post by: Arlen Vander Hoff on August 17, 2008, 02:29:45 PM
Flipping the air cleaner lid was supposed to give you better mileage too!!!
15 HP AND higher fuel economy,why didn't Detroit do that in the first place!!!!!!!!
(http://www.moparfins.com/forum/smileys/smiley36.gif)(http://www.moparfins.com/forum/smileys/smiley36.gif)(http://www.moparfins.com/forum/smileys/smiley36.gif)(http://www.moparfins.com/forum/smileys/smiley36.gif)(http://www.moparfins.com/forum/smileys/smiley36.gif)(http://www.moparfins.com/forum/smileys/smiley36.gif)(http://www.moparfins.com/forum/smileys/smiley36.gif)(http://www.moparfins.com/forum/smileys/smiley36.gif)(http://www.moparfins.com/forum/smileys/smiley36.gif)(http://www.moparfins.com/forum/smileys/smiley36.gif)
Title: Thermoquad - what to do
Post by: Stitcherbob on August 17, 2008, 03:45:39 PM
Main cause of cracked TQ fuel bowls is the float pin slides halfway out when re-assembling the carb and when the top is tightened down, it cracks there.

Title: Thermoquad - what to do
Post by: Brian on August 17, 2008, 04:15:08 PM
Or there are the alignment tabs on the bottom side of the body, to line up with the base plate, if they don't seat properly it will punch those pins up through the floor of the plastic body ad you will have fuel leaking through the carb base into the intake....Been there had that happen...(http://www.moparfins.com/forum/smileys/smiley5.gif)
Title: Thermoquad - what to do
Post by: Herman on August 18, 2008, 12:43:14 AM
The most common issues happening with TQ-carbs are when the O-rings below the primary-jets fail, or the two fuel-transfer 'wells' under the main body start to leak.
You will have to carefully break them loose and re-attach them with JB-weld again.


Title: Thermoquad - what to do
Post by: Stan Paralikis on August 18, 2008, 01:52:14 AM
Quote from: BigBlockMopar
You will have to carefully....
 
What's this "you" stuff?  When the rebuild kit arrives, I'm sending it off to Corey to futz with... (http://www.moparfins.com/forum/smileys/smiley36.gif)