It ain't new. A "ONE" barrel carburetor ?

[Greg Myers]

I found this roaming around the WWW http://www.nmcadigital.com/2012/03/22/pro-systems-%E2%80%93-sv1-carburetor/

The picture is deceiving, in that the large "one" barrel blade is lower than the two brass discharge tubes above it, allowing it to rotate on the axis beneath the four shaft screws.

[jbwelda]

maybe i dont get it...one barrel carbs are quite common on vws and other "foreign" cars, or were back when carburetor induction systems were used on cars.

[Ace-Garageguy]

Interesting. Looks like Holley float bowls and metering blocks. I wonder what the advantage is supposed to be. Maybe less restriction at WOT ? Guess I'll have to read the link...Thanks.

[Greg Myers]

maybe i dont get it...one barrel carbs are quite common on vws and other "foreign" cars, or were back when carburetor induction systems were used on cars.

You got it. That's the point. One barrels used to be small little carbs found on small little cars. This is a full tilt race carb. One blade. One barrel.

Edited April 3, 2013 by Greg Myers

[Blown03SVT]

Makes sense... how many barrels means nothing, it's just the delivery system for more fuel and air. I initially thought it was a throttle body picture

[TheRX7Project]

The "Predator" carb is another 1-barrel racing carb. My dad had one on his Superbee for a while. It's been around since at least the mid-90's.

[Blown03SVT]

It has been around longer than that, the first iterations of the Bigfoot truck ran those carbs. But yea, same idea but I am sure with more R&D behinds it.

[MachinistMark]

The advantage isn't so much more flow, but less disruption of the flow for a denser intake charge. The guy who owns this company has like a couple PhDs in fluid dynamics so I'm inclined to believe him. This is actually the carb I intend to run on my engine.

[Ace-Garageguy]

So Mark, is there a venturi at all? It looks like a straight bore in the photos. It also looks like there are conventional tip-in ports on the throat wall...or are those the accelerator-pump discharge holes?

And what do the brass tubes do? Do they take up the function of the auxiliary venturis ? Or is the pump discharge from the brass cross-tubes??

[Guest G Holding]

I run a one barrel carb and get 105 hp and 110 ftlbs...not bad for 107 CI

[Harry P.]

I always thought multi-barrel carbs were so for better drivability on the street... 2 barrels for general around town puttering and all 4 when you want to go fast. Not an issue on a drag car... so why would a 1-barrel carb be an unusual or "new" idea in a drag application? Isn't the whole point to ram as much fuel/air into the engine as you can?

What am I missing?

[MachinistMark]

yes, there's a venturi, one Reaaaaaaaaaaaal big one. the brass tube replace the "squirters" on your typical holley which disrupt airflow and create turbulence, as does splitting the air charge into 4 streams (4 venturi)

as this picture shows harry, I doubt moving air is a concern for this carb.

http://www.prosystemsracing.com/svseries.html

Edited April 3, 2013 by MachinistMark

[Guest G Holding]

I always thought multi-barrel carbs were so for better drivability on the street... 2 barrels for general around town puttering and all 4 when you want to go fast. Not an issue on a drag car... so why would a 1-barrel carb be an unusual or "new" idea in a drag application? Isn't the whole point to ram as much fuel/air into the engine as you can?

What am I missing?

I would tend to agree, BUT I am not an engineer that can talk for hours about velocity, pressure, NADA. But I do know that a motor is a big air pump...get it in and get it out. But in racing, even drag you have to get the mass moving, overcoming gravity using inertia. BUT the first one to the end wins...Injection also has a "squirter" for each cylinder and because each cylinder is a bit different you need to tune the pump and if ALL work perfect, you win.

Wish it was simple....Gas, Alcohol, Nitro,Propane, Nitrous...all have different needs....

Don't start with 1 coil vs 8 now....

[Guest G Holding]

yes, there's a venturi, one Reaaaaaaaaaaaal big one. the brass tube replace the "squirters" on your typical holley which disrupt airflow and create turbulence, as does splitting the air charge into 4 streams (4 venturi)

as this picture shows harry, I doubt moving air is a concern for this carb.

http://www.prosystemsracing.com/svseries.html

But what manifold do you need.....?? Call WIL$$$ON...Looks much sweeter than the old standby..930cfm Predator

Sure looks fast!

Edited April 3, 2013 by G Holding

[MachinistMark]

itll work on any manifold. but it would be pointless on anything but a Big single plane (super victor, pro products super hurricane, dart, etc) but then again, anything BUT a Big single plane.. is pointless

[Greg Myers]

I run a one barrel carb and get 105 hp and 110 ftlbs...not bad for 107 CI

Does the wrench come with it for the stuff that falls off ?

[Skip]

I always thought multi-barrel carbs were so for better drivability on the street... 2 barrels for general around town puttering and all 4 when you want to go fast. Not an issue on a drag car... so why would a 1-barrel carb be an unusual or "new" idea in a drag application? Isn't the whole point to ram as much fuel/air into the engine as you can?

What am I missing?

Yes, in principal they are as most are set up to open the second set of barrels progressively in essence you are running around on a two barrel carb until you tromp on the gas. Many of the tri-power setups are set up to run on the middle carb then depending on the linkage a second and then third carb comes on the harder the gas pedal is depressed. I have seen some set up to run on one then on all three at about 3/4 +/- open of the center, coming on all the way when the pedal is on the floor.

When I got my '65 GTO it's Tripower linkage was set up in the 2 + 4 (barrels open) set up, it ran much better when changed to a progressive 2 + 2 + 2 set up. Basic idea was to give performance with a degree of economy (even when gas was .27 cents the average guy was making $2 - $4 an hour, much like prices Vs wages today).

That one barrel carb's discharge tubes look more like shower heads, looks like it can supply a lot of air and fuel in a hurry.

Bill, yes indeed those metering blocks look like Holley's design, one end probably feeds one tube and the opposite feeds the other. Sure does look smooth enough to shove a whole lot of air down the throat.

[MachinistMark]

And that is why I'm buying one....

[Guest G Holding]

Does the wrench come with it for the stuff that falls off ?

Thats a S&S....not Harley.....

[MachinistMark]

Ha!