forced induction threw a carb

Reply Subscribe

Thread Tools

Search this Thread

Sep 3, 2006 | 09:29 AM

dmc919

Thread Starter

Senior User

Joined: Aug 2003

Posts: 164

Likes: 0

forced induction threw a carb

can you boost threw a carburetor or does the carb have to come first and the turbo/super charger suck through it?

Sep 3, 2006 | 11:47 AM

Torque1st

Posting Legend

Joined: Sep 2001

Posts: 30,255

Likes: 37

"forced induction threw a carb"

Where did it throw it? -Depends on where or how far you want to throw the carb...

There are special blow thru setups for carbs.

Sep 3, 2006 | 11:59 AM

kspilkinton

Postmaster

Joined: Jul 2001

Posts: 4,038

Likes: 3

From: South Kitsap County, WA

Depends on what type of induction. Centrifugal types (turbo and supercharger) the carb comes after... positive displacement types (ie. roots supercharger) the carb comes before. Judging by how you wrote the request... the first one applies.

-Kerry

Last edited by kspilkinton; Sep 3, 2006 at 12:02 PM.

Sep 3, 2006 | 12:40 PM

dmc919

Thread Starter

Senior User

Joined: Aug 2003

Posts: 164

Likes: 0

i thought carbs worked off the vaccum and that sucks the fuel, with forced induction there would be no vaccum and the carb wouldnt know how much air is going through it cause the air would be compressed, right?

Last edited by dmc919; Sep 3, 2006 at 12:42 PM.

Sep 3, 2006 | 12:56 PM

kspilkinton

Postmaster

Joined: Jul 2001

Posts: 4,038

Likes: 3

From: South Kitsap County, WA

It's true that most carbs work off vacuum, but Eric mentioned something about feed through or blow through carbs... those are designed for applications that do not have the vacuum to suck. They use the boost being blown to push the A/F mix to the head.

-Kerry

Sep 3, 2006 | 03:40 PM

85e150

Super Moderator

Joined: Apr 2004

Posts: 34,499

Likes: 2,811

Older setups with blow-through carbs used a box around the carb, and a little higher fuel pressure to overcome the boost pressure.

'57 Fords with McCullough superchargers, mid '60s Mustangs with Paxton superchargers, and, get this, mid '80s Masaratis used this technology.

I did a google search with "blow through carb" and the first two up are these:

http://www.fordmuscle.com/archives/2...arbs/index.php

http://www.stevemorrisracingengines....b-engines.html

Get your checkbook out.

Sep 3, 2006 | 10:47 PM

Torque1st

Posting Legend

Joined: Sep 2001

Posts: 30,255

Likes: 37

The pressure differential created when the air flows thru the venturi (Bernoulli principle) in the carb is what forces fuel out of the float chamber and into the air stream (no sucking involved). The bowl vents in the carb throat keep the pressure in the fuel chambers the same as the pressure of the air stream. The fuel pressure must also be higher and regulated by the boost pressure. It is a complicated setup but has been done many times.

Personally I think it would be fun!

Last edited by Torque1st; Sep 3, 2006 at 10:50 PM.

10 Ugly Ford Trucks That We Still Kinda Love

Joe Kucinski

10 Things Every Truck Owner NEEDS (2026 Edition)

Michael S. Palmer

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Verdad Gallardo

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Joe Kucinski

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Brett Foote

Top 10 Ford Truck Tragedies

Joe Kucinski

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

Brett Foote

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Michael S. Palmer

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Verdad Gallardo

10 Best Ford Truck Engines We Miss the Most!

Joe Kucinski

Sep 6, 2006 | 08:36 AM

Tiremine

Senior User

Joined: Mar 2004

Posts: 279

Likes: 0

Yes you can boost thru a carb. I have a picture of my setup in my gallery. Blow thru carbs are available or you can modify your own. The best site I have found for information is http://www.turbomustangs.com.

And yes Torque1st 10lbs of boost is a BLAST!!