Choosing a carb - Chevelle Tech
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post #1 of 32 (permalink) Old Jan 13th, 19, 5:59 PM Thread Starter
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Choosing a carb

So I narrowed it down to a getting a new carb. I was gonna go efi but just can’t afford it right now. And if I do, I’ll just do an ls swap later. I’m looking into a 650-670cfm, vacuum secondaries, electric choke. I like the new brawler series from Holley/quick fuel. I also found this Holley from Chevrolet performance. I never had an Edelbrock, so I’m not familiar with them. Anybody have any suggestions. I’m not looking to spend over 500.00 thanks.
https://rover.ebay.com/rover/0/0/0?m...2F392205265666

https://rover.ebay.com/rover/0/0/0?m...2F132550047344
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post #2 of 32 (permalink) Old Jan 13th, 19, 6:01 PM
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Dan
 
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Re: Choosing a carb

You first have to state what exactly it is for engine/combo wise.

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post #3 of 32 (permalink) Old Jan 13th, 19, 6:06 PM Thread Starter
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Quote:
Originally Posted by Stokerboats View Post
You first have to state what exactly it is for engine/combo wise.
Sorry about that. I have a 350 bored 40 over. 1.94 Fuelies, summit 488 cam, Edelbrock performer rpm intake, msd 6al, full headers, full pypes 2.5” exhaust, Muncie 4 speed, 3.36 posi(which might get changed to a 3.73) in my 1970 Malibu.
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post #4 of 32 (permalink) Old Jan 13th, 19, 6:43 PM
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Re: Choosing a carb

The Edelbrock Thunder AVS2 series carburetors are supposed to be great performers. They now have annular boosters. You might look into one of those.

https://www.edelbrock.com/avs2-650-c...-egr-1906.html

1971 Malibu, factory buckets/full gauges/console, 377 roller cammed small block, Turbo 400, 3.42 10 bolt posi (Buick), - All your base are belong to us.
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post #5 of 32 (permalink) Old Jan 13th, 19, 6:46 PM
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Re: Choosing a carb

A good Q-jet would work well.
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post #6 of 32 (permalink) Old Jan 13th, 19, 7:41 PM
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Re: Choosing a carb

offer to sell parts on tech forum deleted

Last edited by Tom Mobley; Jan 17th, 19 at 11:03 AM.
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post #7 of 32 (permalink) Old Jan 13th, 19, 8:32 PM
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Mark Whitener
 
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Re: Choosing a carb

A good Q-Jet would be best, if you want to stick with the Holley style spend a little more and get the SS-680VS Quick Fuel.
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post #8 of 32 (permalink) Old Jan 13th, 19, 11:23 PM
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Re: Choosing a carb

I have a 1970 Q-Jet on my 70-468 Nomad Wagon Its my summertime driver.
Along with a 700R and a 3:07 gear in the 12 bolt. All of the above equals on the interstate at 73 MPH. It spins 1950 RPMs and delivers 19-20 MPG. All the way from Pittsburgh,Pa. to Montgomery Al.
My one owner LS-5/M-22 also has a 7040205. Q-Jet. I guess I am stuck in the past. WHY? The Q-Jets work well.
Bob
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post #9 of 32 (permalink) Old Jan 14th, 19, 12:51 AM
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Re: Choosing a carb

I am also stuck in the past. I just replaced the vacuum secondary 750 Holley 80508S that was on the engine (mostly stock L78 396/375) when I bought the car with a Holley 4780-1 800 Double Pumper that I just rebuilt. 800 Holley is old but in beautiful condition. I am looking forward to trying it out with the new carb. I am obviously not concerned with gas mileage.
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post #10 of 32 (permalink) Old Jan 14th, 19, 11:22 AM
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post #11 of 32 (permalink) Old Jan 14th, 19, 11:35 AM
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Re: Choosing a carb

I have a holley 770 street avenger and am happy with it. lots of info out there about tuning also.

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post #12 of 32 (permalink) Old Jan 14th, 19, 11:38 AM
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Re: Choosing a carb

All you need is a Holley 3310 out of the box if you want a Holley. Farm simple and they work great. No need for special foo-foo brand fancy carbs for something so easy.
Qjet also gets my vote.


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post #13 of 32 (permalink) Old Jan 14th, 19, 11:44 AM
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Re: Choosing a carb

Why do you think you need a new carb? Unless somebody really screwed up the carb that is already installed, you can likely save yourself a lot of money and fix what ya got.

There is no magic carb that is going to produce huge power gains. Any 650-750 cfm 4-bbl will make close to the same hp on a SBC *IF* it is properly tuned. Some designs are better for part throttle fuel economy than others (Q-jet).

Seems like too many people toss perfectly good carbs instead of spending the time to make them work. I guess I shouldn't complain though... makes it easier to find good cores!
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post #14 of 32 (permalink) Old Jan 14th, 19, 11:46 AM
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Re: Choosing a carb

Buy one of these, price is great and they work good too, a TC member on here did

try a Search for his feedback

https://www.jegs.com/i/Demon-Carbure.../1901/10002/-1

https://www.jegs.com/i/Demon-Carbure.../1904/10002/-1

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60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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post #15 of 32 (permalink) Old Jan 14th, 19, 6:06 PM
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Re: Choosing a carb

Quote:
Originally Posted by fr8dog View Post
A good Q-jet would work well.
^^^^^ what he said^^^^^

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