Whats my best carb with little work and good performance?

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Once it's set up correctly and dialed in, Thermoquad, if you don't mind scrounging for parts.
 
good to hear you settled on a good carb for your combo.

to all others, little work 'when it comes to carbs' starts with selecting the right cfm for the rpm range.... and secondary progression for your driving style and trans/gear app, from convertor stall to manual. if you do this...the work to dial it in tits on a ritz take less work.

The performance comes from the quality of tune/tunning versatility of the carb ...as well as parts availability to accomplish it all.

so you just killed to birds with one stone if u can do those 2 things.

All of us who 'know' get this and realize the true champion of performance carburetor manufactures, the same one that carries drivers to winston cup crowns and racing records as some of the fastest race cars on the face of the planet...

I'll also add that I dont know anyone that races at part throttle on only in the primary with a 4 brl carb.
 
Now I know where all the plug fouling comments come from..........


and top fuel records as the fastest race cars on the face of the planet...
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Last Top Fuel/funny/sprint cars I worked on were mech injected... (hilborn, etc) Even the olds based alchy car I was building/tuning at the age of 17-19 had injection......
All the Sprint cars, except the 300 poor boy class.........

Sigh........

I don't understand how this thread went from a reliable performance carb, to all out racing.... Oh well.
 
roachester couldn't make a decent carburetor, how in the hell would anyone consider roachaser a good performance fuel injection setup? LOL


The holley is a tuners carburetor, the eddy is a hot rodders shiny ornament, will I /have I used an eddy before...yes, I have one now.

they will both work, but one mixes/meters a lil better wot due to having a booster in every corner to start...the holley.

the op has made his choice, no sense hammering on the option he chose not to pick.

to each his own, as long as it's on top of mopar..
 
Actually the rochester mech FI was pretty good, I have worked on a few, drawback was the pump wouldn't pressurize the gas at a low RPM, so the 283 would flood, die, and foul plugs under say, 1700RPM. Just like Hillborn, LOL.
Q-Jet? Probably the longest lived carb ever made. But you will suck the single bowl dry in a jiff. The little 2bbl Qjet with no secondaries will run almost upside down too.....

I use the AFB for reliability and MPG for the long haul, not for racing. (LOL) And nobody is hammering the OP, just giving opinions, which turned into racing circuits.

Now get off the computer and get back to the die grinder, and I'll take my boat out and test my new fuel flow sensor that hooks up to my chart plotter, and tells me MPG, fuel rate, how much gas I got, and how much I will burn from A-B.

My Boats got an AFB by the way.... Holley power inboard boats blow up. :axe:
 
tekslk said:
I just put the 770 street avenger on and it seams to work perfect, only thing we didnt do is a fast mash of the pedal.
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yes good choice on your carb easy to tune if need be and will grow with your project and any racer thats really racing can help you tune with out a book as big as dictionary enjoy it they work good
 
I ran 11.90s with a sort of similar combo and a 670 street avenger. I think that 770 is a good choice.

My heads are maybe bigger than yours, and I had an RPM Air gap, so who knows if this helps:

Initially I had a bad stumble when cruising and then matting it.

I went with a 35 squirter and the orange pump cam on hole #2. It had very good driveability, and smooth acceleration either footbraking or on the transbrake. I used the second to softest spring. Can't remember what color that is.

For the average weather conditions around here (about 2100 feet DA) mine liked being jetted up 2 sizes from stock, but again, that was a 670.
 
All carbs have there pros and cons personally i prefer holley and only reason being is the traditional component of period correct mods holleys can be made quite reliable with the proper research to set it up for you.

Also edeies arnt that bad either its all about which brand you perfer

so do your research to your application and figure out which carb would best suite you cause as they say there are a hundred was to skin a cat now its up to you to chose the one that fits your self
 
the wall said:
yes good choice on your carb easy to tune if need be and will grow with your project and any racer thats really racing can help you tune with out a book as big as dictionary enjoy it they work good
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fast mash of the petal has some hesitation I put the stiffer spring in secondary and will drive it tomorrow, If that doesnt make it better I will look at pump squirters.
 
crackedback said:
Same size...

Holleys will usually be superior in performance in every case, but, have more parts in them to mess up.

Ede's are less prone/sensitive to garbage in them.

You want it to run hard, but a holley on. You want to drive around with a generally, pretty trouble free carb, run an Ede.

I call Ede carbs taxi cab carbs...

.
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True, true 100%

Yet if you put 2 of those taxi cab carbs on a rare dual quad intake--removing the front carb secondary air door, you get the best of both worlds. Trouble free, great idle and smooth steady power as you open it up.

I run my Carter 500's one to one. Works better with my 3,000 stall and 3.91 gears.

Not planing on running anything else, no complaints. Some day I like the try taking the other secondary air door out but runs so good I just never seen the need.

Those dual quads intakes are still out there thanks to ebay and fabo, I think somebody has one for sale right now. It is the most costly way to go and when parts cost me over $800 adding everything up and I still needed linkage, hoses, throttle springs, etc I was getting worry I might regret this but it worth every penny looking back 2 years.

I let my car sit for 2 weeks in the garage, took it out a few times--300 miles the last 2 weeks. Drove it hard the first time in over a month, everything worked great. I got just under 1,000 miles on it since getting out from 3 months winter storage-drove it home in 30 degree temps--drove it in mid 20's.

Ran car in mid 80's, no matter the temp, time of year, motor seems to run the same--as for idle smoothness and just getting around.

Did I say i really like my dual Carters:laughing:
 
dustoff440 said:
Once it's set up correctly and dialed in, Thermoquad, if you don't mind scrounging for parts.
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True again, well it might be a tad weaker on top over the duals it might give a bit better mpg and its cheaper and quicker to get done.

Too bad its not still made, wounder who's got the right's for it--why can't China find and make them again--maybe that plastic fuel bowl cost too much to make today with today's clean air bs, too much toxic chemicals are needed to be used to make good strong plastic--yet fuel cells are made of plastic--come on China, make us the Thermoquad, lol
 
Holley still makes one darn good carb, its just seems to need fussing with every so often--it can last all season...it does seem more fussy on just the right jets.

Carters/Eddies are easier to set a tad rich at part throttle to work great in cooler temps yet still have the best A/F ratio at wot. The metering rod's swap sure beats changing jets on a holley--don't miss that part one bit.

Changing both secondary jets on my duals is a pain and takes longer, lucky Edelbrock was pretty close on the .077 jets they recommend for Chevy's. I tried a few sizes up and down, got .080 in it now, seems best

Funny thing is stock the 500 carb came with .095 jets or close to that. Was way down on power--I just had to try it, ha ha

If I had to pick just ONE carb for best power, holley/demons would be it. Hard to beat the power of a 750, 950 or even the 850 carbs. Yep, holley's 950 flow less cfm than the 850's...look at the specs
 
moper said:
Yup. The Avenger series is wet flowed, like the HP series, BG, and all custom shop carbs. Comparing apples to apples in terms of flow testing... the 770 Avenger = 875 cfm or so dry flowed. 670 Avenger = 760 cfm or so. If it was me, I'd change the order before you bolt it on, but that's me.
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BTW, this bog is the result of a carb that's too large. See my timing idea in your other post... That's how you might be able to compensate for the oversizing.
 
A 750cfm Edelbrock isn't too big for a mild 360 small block. Mine runs great with no issues at all. Any carb in the 600cfm-750cfm range will work as long as it's properly tuned. I prefer the larger carb for the top end power gain/advantage.
 
Had 2 EDE's on my 340 duster and had nothing but problems out of them, Got a 650 Holley and have been trouble free. Everyone has their own ideas so do what you think is best for you. BUT Crackback got it right.
 
I had an eddy 800 and it was awful, never could tune it right but i didn't have the metering rods, just jets.

I got my Carters as NOS off ebay, got one no choke 500 and a few weeks later on another seller had one also--unbelievable. Both sold for cheaper than a new eddy carb.

Eddy does have lots of rebuilt warranty exchange carbs for sale. So bad carbs would not surprise me. Almost everything isn't made as good as it once was.
 
MY340 said:
A 750cfm Edelbrock isn't too big for a mild 360 small block. Mine runs great with no issues at all. Any carb in the 600cfm-750cfm range will work as long as it's properly tuned. I prefer the larger carb for the top end power gain/advantage.
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yeah, 500 2 brls came on some stock 360's, thats a lot bigger primary than this 770, let alone the secondaries are only feeding what the engine will pull.

too big?

NO.

every cam'd 318-360 i ever run needed a shooter/pump cam tune, the automatics needed more cause the 28's that came stock dont do it.
 
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