what carb to use on 440 build help
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biginch=bigfun
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If you are interested in a thermo-quad u can get themreally cheap at a swap meet or most online sites that have used parts for sale.
Remember these are all opinions based on personal expiriences. If there was one tried & true carb that did everything better...thats all you'd see used!
Good luck to ya!
Remember these are all opinions based on personal expiriences. If there was one tried & true carb that did everything better...thats all you'd see used!
Good luck to ya!
Always remember-- it's better to go a little smaller than too big. I started off with a 780-cfm Holley with vacuum secondaries. Then went to a 850 dbl.-pumper when everything else was upgraded. A little less, is way better than too much at the beginning.Avs's and Holley's are both fairly easy to tune .
99ss
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can someone please sponsor me one of those:headbang:
lewtot184
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or maybe one of these!:hello2: or reasonable facsimile.
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lewtot184
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i think those intakes, edelbrock ch28, flow about 260-280cfm per port. the real question is; do the cylinder heads flow enough for the manifold. its my understanding that whatever the head flows the manifold needs to flow more and so on with carbs to prevent any restrictions. not a straight forward answer but probably close to the correct one. those are 600 edelbrocks and i believe the manifold will flow more air than the carbs.
99ss
Well-Known Member
Ah I thought they were bigger...LOL
Yeah heads are my next decision for the 440.... thinking about some Edelbrocks for the cost of them, the car is not a racer but I do want to have more get up and go..
Ebrock makes it easy to use thier system/stuff and mopar engine stuff is not my strong suite
Yeah heads are my next decision for the 440.... thinking about some Edelbrocks for the cost of them, the car is not a racer but I do want to have more get up and go..
Ebrock makes it easy to use thier system/stuff and mopar engine stuff is not my strong suite
lewtot184
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actually that set up ran better with a 3.23 rear vs a 3.55 or 3.91. they don't "need" a bunch of stuff to work; just a good tune. but, extras are iceing on the cake.
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It's not so much about flow but what the fuel does in the port. Generally, the low rise 2x4 intakes are kinda sluggish on the street in the lower rpm ranges and the fuel tends to puddle in them. I've found that a tunnel ram will work pretty well on the street and will usually outperform a low rise setup but then you have this thing sticking up through the hood. I think they do well because there's not many places in a TR for fuel to become 'lazy'....
TheGodfather
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What Brand of Carb & CFM best for 440?
Get a 750 AFB (Edelbrock), bolt it on and enjoy a well running engine. These are great carbs and tuning parts as well as instructions are easily available.
I'm with Meep-Meep on this!! His recommendation is a nice balanced trouble free approach for you. I've experimented with all of them at one time or another. Since it's mostly a street application car; Make sure it has a choke on it. She should start right up and run strong with that.
Get a 750 AFB (Edelbrock), bolt it on and enjoy a well running engine. These are great carbs and tuning parts as well as instructions are easily available.
I'm with Meep-Meep on this!! His recommendation is a nice balanced trouble free approach for you. I've experimented with all of them at one time or another. Since it's mostly a street application car; Make sure it has a choke on it. She should start right up and run strong with that.
hemichuck
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Every engine is different and the carb is affected by a lot of variables. None of the carbs mentioned is truely "plug and play" as many here have stated.They are factory set where they should start up and run without modification but they surely wont be running their best. Your best bet is to get a vac gauge and learn a minimul amount about tuning carbs and then none of these carbs will seem like a mystery.Most Edelbrock/carter carbs run a little fat right out of the box and will load up in traffic so at a minimum(to make it right) you need to jet the primaries,check the metering rods and springs to make sure they are right for the amount of vac you are pulling.The Edelbrocks are probably the easiest and most forgiving carb for a beginner(which is why you see them on so many street cars). On the Holley carbs its usually just the jets and make sure which power valve you need and if its a vac secondary you might have to change the spring to make them open when you want.The holleys will probably offer the best power and tunability potential once you understand them(which is why you see them on almost every race car) The Thermoquad is a whole different animal and if you can tune one of them then more power to you. Between the main bodies warping and difficulty in finding parts for them I usually just throw them out or sell them at swap meets to people who can deal with them. If you have a stock motor and you are trying to maximize fuel economy( which with a 440 seems redundant) then a TQ might have a slight advantage if you know how to work on it.
yannick47
Well-Known Member
i ended up getting a n eddy 1407 carb of summit...just plugged in last night (breaking in the engine)and yes i pretty much bolted it on and it idled quite well the whole day.......i have me old holley carb up for sale if anyone hre is interested...its been taken apart so yea needs a rebuild but otherwise it looks good...ill postt some pics up at the for sale section if anyone's interested
99ss
Well-Known Member
good choice, you wont ever go wrong with a plug and play unit like that...
are there better performing carbs? Maybe so at the race track but I have never had an issue with Edelbrock on the streets or out of the box
FridayGt
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I just picked up a 1407 from my shop this morning too. It's in the back of my daily driver getting ready for a bolt on tonight. Sounds like I can hopefully expect a similar success story.
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The TQ really isn't so bad to tune once you understand them but most seem to miss the tuning of the secondary air door and set them to open too fast and hence the name, Thermobog. Also, they were usually not set right from the factory and most dealer mechanics didn't know how to set them either or the setting procedures were not followed...so, many people just chunked them. So far, the best street carb I ever had was on a 71 340 Cuda. It kept a tune and delivered great fuel mileage and performance. Don't throw them away...just pass em on to someone that needs them. I gave away and sold a very large box several years ago but still have one laying around. Having the secondary air door tool makes this adjustment very simple to do but that tool isn't so easy to come across these days....
383man
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I agree that I need more carb in my combo. I dont know who has to all this tuning with Holley carbs but even with the 850 I am using on my 493 I did not have to do much tuning and it runs great. I had to jet up alot and thats about it. I had drilled the squirters with the old eng and that worked fine on the new eng. Usually if you have to do alot of carb tuning it is because someone picked the wrong size carb. But for what you are doing you cant go wrong with a Holley 750 vac secondary carb. Makes a nice street carb for a mild 440 like yours. Ron
383man
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I will say the few friends I know that have used the Eddy carbs have all been a tad lean. I do the tuning on most of my buddies cars and the Eddy's have all been a bit lean when the secondaries come in. I have one of the Eddy kits as I have had to change metering rods and jets a bit to get some right. All in all they are not a bad carb for a driver. If you are going for the best performance then I still prefer the Holley DP carb. Good luck with it as it sounds like it is working ok for you. Ron
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