Mechanics, a question about how a carburetor works... - GoFuckYourself.com

dyna mo · 12-22-2015, 02:11 PM

i've googled this and must not be asking the question right but on a 4 barrel carb, is each barrel dedicated to 2 cylinders (of an 8 cylinder engine)?

crockett · 12-22-2015, 02:21 PM

No. They will run off 2 barrels until the gas pedal is pushed enough to open the remaining 2. All the fuel gets dumped into the intake in pretty much the same place so there is no way to tell the fuel which cylinder to go to. The intake is designed to try to get even amounts of fuel to each cylinder.

That's what direct fuel injection does..puts it directly into the cylinders.

dyna mo · 12-22-2015, 02:41 PM

Quote:

Originally Posted by crockett

No. They will run off 2 barrels until the gas pedal is pushed enough to open the remaining 2. All the fuel gets dumped into the intake in pretty much the same place so there is no way to tell the fuel which cylinder to go to. The intake is designed to try to get even amounts of fuel to each cylinder.

That's what direct fuel injection does..puts it directly into the cylinders.

nice then, thx crockie!

baddog · 12-22-2015, 02:46 PM

I used to wire my 4 barrel so the 2nd two couldn't open to get better mileage

Choopa Phil · 12-22-2015, 02:49 PM

Quote:

Originally Posted by baddog

I used to wire my 4 barrel so the 2nd two couldn't open to get better mileage

Sounds like a sure way to run lean and burn through the top of a piston.

baddog · 12-22-2015, 02:50 PM

Quote:

Originally Posted by Choopa Phil

Sounds like a sure way to run lean and burn through the top of a piston.

Ha, yeah right.

dyna mo · 12-22-2015, 02:51 PM

Quote:

Originally Posted by baddog

I used to wire my 4 barrel so the 2nd two couldn't open to get better mileage

it's crazy watching the amount of gasoline pouring through a big honking holley 4 barrel with the butterflies open!

georgeyw · 12-22-2015, 05:42 PM

Quote:

Originally Posted by crockett

No. They will run off 2 barrels until the gas pedal is pushed enough to open the remaining 2. All the fuel gets dumped into the intake in pretty much the same place so there is no way to tell the fuel which cylinder to go to. The intake is designed to try to get even amounts of fuel to each cylinder.

That's what direct fuel injection does..puts it directly into the cylinders.

also vac secondaries that open up as the car sucks more air

Quote:

Originally Posted by baddog

I used to wire my 4 barrel so the 2nd two couldn't open to get better mileage

That doesn't sound like the greatest idea.

MiamiBoyz · 12-22-2015, 06:21 PM

I have no idea but while we are discussing how things work I have always wondered about how an air conditioner works.

RebelR · 12-22-2015, 06:52 PM

Quote:

Originally Posted by MiamiBoyz

I have no idea but while we are discussing how things work I have always wondered about how an air conditioner works.

Ever feel a bbq tank as you are grilling and wonder why it's freezing in the middle of summer? The liquid propane absorbs heat as it vaporizes. AC works the same way. A compressor condenses a refrigerant gas into a liquid, as it turns back into a gas it absorbs heat and cools the air passing through it

dyna mo · 12-22-2015, 07:26 PM

Quote:

Originally Posted by RebelR

Ever feel a bbq tank as you are grilling and wonder why it's freezing in the middle of summer? The liquid propane absorbs heat as it vaporizes. AC works the same way. A compressor condenses a refrigerant gas into a liquid, as it turns back into a gas it absorbs heat and cools the air passing through it

Nice example. Was learning about propane refrigerators recently, was curious how they work since they cool by burning propane. The system is clever, the propane flame heats up liquid ammonia in a closed tube system, the ammonia turns to gas and rises up through the tubes, absorbing the heat out of the refer.

baddog · 12-22-2015, 07:47 PM

Quote:

Originally Posted by dyna mo

it's crazy watching the amount of gasoline pouring through a big honking holley 4 barrel with the butterflies open!

Especially with a 348 V8, hence disabling the secondary

baddog · 12-22-2015, 07:49 PM

Quote:

Originally Posted by georgeyw

That doesn't sound like the greatest idea.

Based on what?

12-22-2015, 02:11 PM	#1
dyna mo The People's Post Industry Role: Join Date: Dec 2008 Location: invisible 7-11 Posts: 64,326	Mechanics, a question about how a carburetor works... i've googled this and must not be asking the question right but on a 4 barrel carb, is each barrel dedicated to 2 cylinders (of an 8 cylinder engine)?

12-22-2015, 02:21 PM	#2
crockett in a van by the river Industry Role: Join Date: May 2003 Posts: 76,806	No. They will run off 2 barrels until the gas pedal is pushed enough to open the remaining 2. All the fuel gets dumped into the intake in pretty much the same place so there is no way to tell the fuel which cylinder to go to. The intake is designed to try to get even amounts of fuel to each cylinder. That's what direct fuel injection does..puts it directly into the cylinders.

12-22-2015, 02:46 PM	#4
baddog So Fucking Banned Industry Role: Join Date: Apr 2001 Location: the beach, SoCal Posts: 107,089	I used to wire my 4 barrel so the 2nd two couldn't open to get better mileage

12-22-2015, 06:21 PM	#9
MiamiBoyz fgfdftre6 Industry Role: Join Date: Oct 2012 Location: In the closet with your dad! Posts: 6,690	I have no idea but while we are discussing how things work I have always wondered about how an air conditioner works.