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Re: Fastest Thermoquad?
[Re: dOc !]
#209599
02/01/09 10:30 AM
02/01/09 10:30 AM
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Joined: Dec 2006
Posts: 3,396
Pa
Hot 340
master
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master
Joined: Dec 2006
Posts: 3,396
Pa
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Quote:
OK .. but why would he say something like this without being specific ? .. and maybe he did not know how to tweak a TQ.
Was this guy competitive in SS ?
Who knows, I was just chatting with him a little.
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Re: Fastest Thermoquad?
[Re: slantzilla]
#209600
02/01/09 12:14 PM
02/01/09 12:14 PM
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Joined: Dec 2005
Posts: 206
ohio
prochamp
enthusiast
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enthusiast
Joined: Dec 2005
Posts: 206
ohio
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Quote:
The biggest drawback to a TQ that I have seen anyone actually prove through testing on a big block was small fuel bowl capacity.
A buddy and I did back-to-back-to-back testing between a self modified 800 QJ, a Kenne-Bell 1000 TQ, and an 850 Holley on an 11 second 455 Buick GS. The TQ ran about the same as the QJ and the Holley was .3 and 2MPH faster. Same car, same day.
Yes, we had every available jet, needle, and needle/seat combo and just couldn't get enough fuel into either the TQ or QJ to make up the difference. 
Of the three, my favorite was the QJ for simplicity and ease of adjustment. 
that sounds to me like his fuel delivery wasn't up to snuff or didn't make the right adjustments.the quadj.only has one bowl so fuel delivery is everything but the tquad has 2 bowls with nearly the same capacity as the holley.we ran a tquad on a 68 440 superbee a few years ago and went 10.50s without any problems with running out of fuel. 
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Re: Fastest Thermoquad?
[Re: dOc !]
#209601
02/01/09 03:11 PM
02/01/09 03:11 PM
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Joined: Aug 2005
Posts: 4,102
Yes
sixpakdodge
master
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master
Joined: Aug 2005
Posts: 4,102
Yes
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Quote:
The Competition TQ .. if you can find it. But other than that ... a good early one -- say off of a motorhome or truck.
NO NEED for some high $$$ parts ... just get a service manual and some hi-po tech articles from some past monthly magazines.
PLUS ... you will need that new and improved air-valve tool !  .... 
Thanks!
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Re: Fastest Thermoquad?
[Re: prochamp]
#209602
02/01/09 07:01 PM
02/01/09 07:01 PM
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Joined: Jan 2003
Posts: 2,158
Hamilton,Ohio
POZEST
OP
top fuel
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OP
top fuel
Joined: Jan 2003
Posts: 2,158
Hamilton,Ohio
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Quote:
i ran 10.16 with one 345 inch w2 motor.mike wethington ran 10.07 last season in his 365 inch w2 lebaron.
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Re: Fastest Thermoquad?
[Re: B1Fish540]
#209605
02/01/09 07:52 PM
02/01/09 07:52 PM
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Joined: Sep 2005
Posts: 549
Chicagoland
chargerron69
mopar
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mopar
Joined: Sep 2005
Posts: 549
Chicagoland
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iirc demon sizzler here on the board is the tq guy. maybe he will chime in on the subject
67 Coronet 383 hogged out 906's 727 430 dana best 10.48 @126.80 1.47 60 on fogger
same car pump gas 605 wedge 9.98 @ 138.42 1.50 60 on wore out 9 inch radial slick ss springs and frame connectors its got more in it!!!
72 Newport 2 door 400 727
85 Ram 440 4 speed O/D 3.54 dana
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Re: Fastest Thermoquad?
[Re: sg1093]
#209607
02/01/09 08:21 PM
02/01/09 08:21 PM
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Joined: Aug 2005
Posts: 761
Southington Ct.
turbobitt
super stock
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super stock
Joined: Aug 2005
Posts: 761
Southington Ct.
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This Ford is a friend of mine. 460 with a 800 theromoquad I believe or small of the two, not the bigger one. He set the record in his class. Actually went 9.58 on that pass.
Last edited by turbobitt; 02/01/09 08:31 PM.
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Re: Fastest Thermoquad?
[Re: Rapid340]
#209609
02/01/09 10:24 PM
02/01/09 10:24 PM
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Joined: Jan 2003
Posts: 6,392
nielsville, minn.
quickd100
master
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master
Joined: Jan 2003
Posts: 6,392
nielsville, minn.
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I can't imagine not being able to get enough fuel to and into a thermoquad. .120 seats will supply all the fuel you can ever use in one. As long as the rest of the fuel system is up to the task of delivering fuel to the carb you should be fine. Everybody and his brother makes parts and pieces for Holleys, along with thousands of manhours doing R&D on them. What would you expect? I love the thermoquad and as someone earlier posted, they were way ahead of their time and one of the finest 4barrels built. Sure you can throw money at a Holley and make it work, for a fraction of the cost I can make my thermoquads scream. Other than my time, I believe I've got less than $100 in a set of thermoquads on my 528, they flow well past 900cfm each. They give me outstanding fuel mileage, explosive response and acceleration. What more does a guy need? Dave
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Re: Fastest Thermoquad?
[Re: quickd100]
#209610
02/02/09 03:52 AM
02/02/09 03:52 AM
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Joined: Jul 2003
Posts: 4,788
Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,788
Holland MI Ottawa
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When Thermoquads are being rebuilt where do new plastic main bodies come from? That was always the preached downfall- that youd find a Thermoquad and the main body would be cracked. I thought the bodies sold out decades ago.
Keep old mopars alive.
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Re: Fastest Thermoquad?
[Re: 2boltmain]
#209612
02/02/09 09:47 AM
02/02/09 09:47 AM
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Joined: Jul 2008
Posts: 30,474
Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,474
Florida STAYcation
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Quote:
When Thermoquads are being rebuilt where do new plastic main bodies come from? That was always the preached downfall- that youd find a Thermoquad and the main body would be cracked. I thought the bodies sold out decades ago.
This is another old-wives-tale. I have done more than my share of TQ rebuilds and tweaks and I have NEVER seen a cracked or warped "Plastic-Fantastic" main body.
Now I am not saying it has not ever happened .... but from what I hear -- it has happened only when the carb is exposed to very extreme comditions ... such as in a truck/motorhome application ... where the exh man flapper sticks closed and the carb is "torched" through the intake manifold. And then there is the EVER FAILING plastic floats ... that will sink due to the alky blands of fuel ... and this can cause a fire. But an EZ fix it is ... brass floats to the rescue.
And then the MOST FAMOUS "failing" of the TQ .. the secondary air-valve....the INfamous ThermoBog. THIS is brought about 99.999% of the time from operator-error in tuning this most important aspect of the carb.
But THAT can be corrected directly ...with the new-and-improved "Electric Banana" TQ AV tool !!
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Re: Fastest Thermoquad?
[Re: dOc !]
#209613
02/02/09 11:01 AM
02/02/09 11:01 AM
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Joined: Jan 2008
Posts: 411
Big Island ,VA
JC Childress
mopar
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mopar
Joined: Jan 2008
Posts: 411
Big Island ,VA
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Shane Studley set the Super Stock GT/TB in his Thermoquad equipped 360 LA engine in his Dodge Dakota on Fri. He went a 9.82 ! Not too bad for 3050 pounds and cast iron headed, 9 to 1 comp small block huh ?
J.C. Childress
(434) 665-9541
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Re: Fastest Thermoquad?
[Re: DEMONSIZZLER]
#209615
02/02/09 11:35 AM
02/02/09 11:35 AM
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Joined: Jan 2003
Posts: 826
Stone Mt, GA.
DEMONSIZZLER
super gas
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super gas
Joined: Jan 2003
Posts: 826
Stone Mt, GA.
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As for bowls, the larger majority are actually in good condition; only three ways I am aware of for the bowl to crack:
a)striking or dropping the bowl,
b)severe overheating of the engine,
c)water getting into the bowl and freezing.
Overheating will also 'warp' the rear upper corners of the bowl and repair is necessary.
These are the most common problems with the bowls; on Holley carbs, the corners of the base plate will break off and also it is easy to strip out the threads for the bowl screws in the main body. On Q-Jet carbs, you have main well leaks.
Bottom line is all models, styles of carbs have potential problems but the T.Q. is always going to draw the most complaints simply because it tends to be 'too complicated'.
But for me, it is the best carb in terms of 'cheap' hp, fuel mileage and it is lighter than any other 4 bbl carb, keeps the fuel cooler and all adjustments are external when jetting parameters are corrected. This means you do not need any more/extra tuning parts period. You tune each of the three main circuits from the outside. Can't get much simpler than that!
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Re: Fastest Thermoquad?
[Re: B1Fish540]
#209618
02/02/09 02:21 PM
02/02/09 02:21 PM
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Joined: Jul 2008
Posts: 30,474
Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,474
Florida STAYcation
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Quote:
This is all very interesting and good info. Has anybody tried running dual TQs? Will they fit on a regular(edlebrock)manifold? 
This guy here ....is all smiles !! 
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