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Re: Thermoquad question #242367 03/09/09 02:55 PM 03/09/09 02:55 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Quote: OK with TQ guide in hand here's what i have found that I think would work: -6139S is for a '72 340 automatic (needs a rebuild). -6324 is for a 73 HP 440 automatic (newly rebuilt) -6090 for a 72 400 auto (newly rebuilt) **4968 Carter AVS for a 71 HP440 auto (newly rebuilt) will any of these other carbs work well on my 340 ? Will a carb for a 440 HP be too much? The 440 and 400 carb will be the same, maybe with a little different jetting stock. The link should say which jets are in there. But any of them will work with some time spent tuning.

Re: Thermoquad question [Re: DaytonaTurbo] #242368 03/09/09 03:02 PM 03/09/09 03:02 PM
Joined: Jan 2003 Posts: 5,304 Land 'O Lakes RoadRunnerLuva master
RoadRunnerLuva master Joined: Jan 2003 Posts: 5,304 Land 'O Lakes	Kenicb: Go to Demonsizzler's website: www.thermoquads.com for some good info... Plymouth Makes It!

Re: Thermoquad question [Re: 4BBodies] #242369 03/10/09 12:47 AM 03/10/09 12:47 AM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	You don't need to worry about over carbing with the 850's. Hotroddave40 got 29.5mpg in his super mileage 318 Cuda with an 850. Get the "biggie sized" TQ to start with! The TQ will only pull what the engine demands from it. What I would like to see is how to mod the emission carbs. How to mod the spray bars etc. I really want to bolt a 318 model TQ on a hot slant6. "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: Thermoquad question [Re: Rug_Trucker] #242370 03/10/09 08:53 AM 03/10/09 08:53 AM
Joined: Jan 2003 Posts: 9,982 Ansonia, CT C CJK440 master
CJK440 master C Joined: Jan 2003 Posts: 9,982 Ansonia, CT	Quote: You don't need to worry about over carbing with the 850's. Hotroddave40 got 29.5mpg in his super mileage 318 Cuda with an 850. Get the "biggie sized" TQ to start with! The TQ will only pull what the engine demands from it. The 800 and 850 TQ's have the same size secondary butterflies. The difference is in the primaries. Me thinks a small motor street motor that sees a lot of around the town driving would want the 800 for the better vacuum signal where it matters for drivability. Even the small TQ at 800cfm is huge for a stock stroke small block. 2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"

Re: Thermoquad question [Re: CJK440] #242371 03/10/09 06:57 PM 03/10/09 06:57 PM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	Quote: Quote: You don't need to worry about over carbing with the 850's. Hotroddave40 got 29.5mpg in his super mileage 318 Cuda with an 850. Get the "biggie sized" TQ to start with! The TQ will only pull what the engine demands from it. The 800 and 850 TQ's have the same size secondary butterflies. The difference is in the primaries. Me thinks a small motor street motor that sees a lot of around the town driving would want the 800 for the better vacuum signal where it matters for drivability. Even the small TQ at 800cfm is huge for a stock stroke small block. One difference between a Holley and a TQ or Qjet is the AIR VALVES They alter the air flow so you can't over carb with the spring tension set right. I've ridden in Daves 318 powered Cuda there is no bog with the 850. The primaries are small on the 850's compared to AFB's and Holleys. 1 1/2" on the 850. 1 3/8" on the 800. A BBD for a 318 or super6 has 1 /14". On my heavy van with a broken air door spring it would lay down and bog. New spring it gets up and honks! Why? The spring regualtes the air flow to engine demand. Some 360's came with the 850 from the factory. "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: Thermoquad question [Re: Rug_Trucker] #242372 03/10/09 07:57 PM 03/10/09 07:57 PM
Joined: Jan 2003 Posts: 9,982 Ansonia, CT C CJK440 master
CJK440 master C Joined: Jan 2003 Posts: 9,982 Ansonia, CT	Yeah I'm familiar with the air door but that only regulates the secondaries and there is lots of throttle movement between idle and when the secondaries crack. Till then the air door does nothing. Perhaps the 1.5" primaries are still small for a stock smallblock, I'm just sayin'. 2017 Contusion Blue Challenger T/A 392 M6 "BLKNBLU"

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