Has anyone tried the four barrel intake for the 3.0

[Mike b]

Seeing if any body else has had the idea or tried one

 

[Bgunner]

I believe you would have to use really small jets to keep the motor from flooding unless you have heavily modified the heads and low end of the motor. I'm not seeing the pros to doing so though.

 

[adsm08]

Its already underpowered with EFI and proper fuel metering.

I fail to see how a carb is going to make it less sh*tacular.

 

[rusty ol ranger]

Jet it right.
Tune it right.
Have a properly functioning choke.

You wont even notice a difference compared to EFI.

That being said, i doubt youll gain any performance. If your goal is simplcity, then by all means.

GM ran a 4bbl quadrajet on the 4.3 back around 85. Thats the smallest engine i know of to run a 4bbl, but might give you a starting point to proper carb size.

 

[fastpakr]

A Holley 390 would probably work just fine size wise, but there is -no- advantage to running a carb on a 3.0, but numerous reasons it's an awful idea.

 

[RonD]

If you add more gasoline to an engine you get a flooded engine, not more power

Air/fuel ratio for gasoline is 14.7:1, this is a weight ratio
14.7 POUNDS of air to 1 POUND of gasoline
14.7 grams of air to 1 gram of gasoline

A 5 LITER engine has more power than a 3 LITER engine because it can pull in 2 more LITERS of air every 2 RPM, so more gasoline can be added every 2 RPM

Super or Turbo chargers FORCE more air into an engine so more gasoline can be added every 2 RPM

So AIR is what gets you more power

EFI is better because injectors are at the intake ports, so fuel only coats head ports and back of intake valves, less fuel loss
Carbs coat the whole intake, all its passages including the head ports and intake valves

Direct Injection is best, no fuel loss in coating passages

EFI uses "on the fly" calculations, so much more responsive to elevation changes, sea level to 5,000ft for example, thinner air less fuel added.
A Carb is tuned for location(elevation) and outside temp, also barometric pressure at that moment
As air temp changes and high and low pressure fronts move through an area you need to retune the Carb for best performance, it ain't much BUT it ain't 0 either
With EFI you don't, thats what the sensors are there for

Spent my younger days with Carbs, and distributors with points, lol
EFI and no distributor is BETTER

If you prefer carbs or distributors because you can tune them yourself, then you just have the wrong tools in your kit, because anyone can get the tools to tune EFI and distributorless engines.
So if thats your desire then stick with what you got, and get the right tools to tune your vehicle as YOU see fit

 

[rusty ol ranger]

You guys way overplay the disadvatages of a carburator.

 

[Dirtman]

And you're way too nostalgic for ancient technology.

 

[adsm08]

You guys way overplay the disadvatages of a carburator.

Not really.

They are amazing technology and to the job amazingly well for a fully mechanical device designed over 100 years ago that has no ability to adjust to changing conditions on the fly.

They cannot produce the fuel economy, emissions quality, and horsepower that an EFI system does all at once.

Honeslty, even the early EEC-IV systems aren't much better as they only sample the barometric pressure once at start up.

If you have a pre-OBDII Ford with a Baro sensor instead of a MAP sensor and make a drastic change in elevation it will start running poorly at some point during the drive.

 

[fastpakr]

You guys way overplay the disadvatages of a carburator.

We live in reality.

 

[RonD]

You guys way overplay the disadvatages of a carburator.

Well even a modern carburetor has no advantage over fuel injection, and the conversation started with dumping 3.0l EFI in favor of 4-barrel Carb

First "carburetor" was used in 1826, it used air passing over the surface of gasoline to combine the air and gasoline fumes that went into the engine.
So modern carburetor was way BETTER that those, big advantage.

In 1885, Wilhelm Maybach and Gottlieb Daimler developed the first Float type carb with atomizers(jets)
Modern carburetor would have advantages over this one, but basically the same technology with more refinements

There was a "wick" carburetor for awhile, used a float bowl but no "jets", worked like an old oil lamp, gasoline was wicked out of a float bowl by air passing over the wick and evaporating the gasoline in to the air stream going into the cylinders
Never caught on, pretty slow throttle response I bet, lol
Modern carburetor would have the advantage over this one

When you compare carburetors you can have advantages and disadvantages in different types or brands

But if you compare carbs to EFI then its EFI 1, Carbs 0
Different technologies

Taking dirty clothes down to the river and washing them by hand
Throwing dirty clothes in to the washing machine

Not every one can fix a washing machine, so "Taking dirty clothes down to the river and washing them by hand" is better because you don't need any extra knowledge to "fix it", I don't think thats an advantage myself, some may

 

[8thTon]

The amount of fuel you put in an engine is just a consequence of how much air it is drawing in - there is a very narrow range of allowable ratios. Since the EFI throttle body isn't very restrictive you won't draw in any more air with the carb, unless you make other changes. And you could always put on a bigger throttle body if it was.

Too large of a carb won't make it run rich, it just means there won't be enough air flow to properly activate the various fuel circuits and it won't meter correctly. Even a properly set up carb can only be correct for one set of conditions, while the EFI can adjust based on sensor inputs and mapping, or feedback from the O2 sensors when in closed loop. Plus port injection gives better fuel distribution.

 

[rusty ol ranger]

Carbs have many advantages over EFI. I have listed them a dozen times so i wont again.

All im saying is carbs are just fine under 99.9% of operating conditions.

 

[Mike b]

Was asking I'm thinking about a stoker kit and new heads

 

[Dirtman]

Carbs have many advantages over EFI. I have listed them a dozen times so i wont again.

All im saying is carbs are just fine under 99.9% of operating conditions.

Your reasons aren't rational. They are better to YOU because YOU can work on a carb better than YOU can work on EFI. You might as well say a typewriter is better than a laptop because YOU dont know what powerpoint is. In your world a carb is better, but to the rest of society who has long since embraced indoor plumbing and the internet. There are zero advantages to a carb except sentimental value or being all you understand. The worlds best tuned carb cannot compete with a computer though... It's science... Not opinion.

Now excuse me, I need to go change the jets on my edelbrock avs2 from winter to summer settings.

P.S I love you rusty... You are by far my favorite person to argue with on the interweb.