FBO-Est

Parts what last!

Carburator upgrade "ET SLAYER"

Fuel aeration or foaming in the bowls:

This is caused by the Mighty Demon/Holley needle and seat (designed in the 50's) spraying fuel into the top of the bowl causing the fuel to foam. It doesn't take a rocket scientist to figure out that this will cause the float to become unstable and bounce around changing the fuel curve as well as pre-emulsifying the fuel in the bowl rather than in the circuit where it can be controlled by the air bleeds.

Check this picture down. This test have been made at 8psi fuel pressure

On left side of bowl - Note how the fuel is foaming in the bowl with a conventional Holley style needle and seat.
On Right side of bowl - Clean solid fuel with the "CARP" Needle & Seat.
Ask any NASCAR or ProStock Team what N&S they use.

Any questions?

Our new Bottom Feeder Needle and Seats put the fuel into the bottom of the bowl virtually eliminating all foaming of the fuel. End result, a solid stable fuel load in the bowl and a steady float level bringing even more consistency to your ET's. We do not physically modify the Mighty demon and any component part can be replaced with the stock pieces in a pinch. You'll never be disabled because of a modification we've done to your Barry Grant carburetor.

Which do you think will deliver more consistent ET's??

Do you want to win races or practice loading your car?

The Bottom Feeding "Carp" Needle and Seat Conventional style Top Loader

The Mighty Demon Standard .110 N/S will flow about 189 pounds per hour at 3 PSI the "Carp" .120 (Standard Upgrade) will flow 239 pounds per hour at 3 psi. You've got a good high volume pump and now you can utilize that pumps full capacity.

Fuel slosh:

Another aggravating problem that causes ET's to vary as you go down the 1320. The fuel being delivered into the bowls under pressure colliding with the float , bumps in the track, a little steering correction and those big square floats raise hell with the fuel level in the bowls.
By using our winged or "V" shaped float in conjunction with our "Bottom Feeder" N/Seats these irregularities can be virtually eliminated

G Forces:

Your hard launching muscle or race car leaves with huge G Forces pushing all the fuel away from the rear main jets. This causes the back side of your engine to go dead lean until the fuel levels back out and begins to feed the back half of the carb again. Try and dial that on your window. By using Barry Grants own encapsulated jet extensions (Meaning the jet actually holds the extension in the metering block) in the rear bowl, as the fuel tries to escape from the jet the extensions are still deep into the fuel, result, no lean or launch stumble caused by a fuel curve drop on launch.

NEVER Stick Gaskets:

Stamped from M-15 Fiber material exclusively for FBO Systems from our design. This material will NOT Stick Ever, won't tear and leak. Change jets in your mighty Demon/ETS after every pass or every lap, you'll never miss a round or a lap because of Barry Grants or Holley`s sticking, tearing, leaking bowl or metering block gaskets.

In Fig. 1 below you can see how we've beefed up the bowl gaskets, removing holes that are not required for Mighty Demons and King Demons, increased the overall size for better sealing and a better fit.

Fig. 1

Check out the metering block main circuit passage in Fig. 2, note the design, now look at your current gasket you'll notice that the gasket covers a major portion of the circuit. Now look at the way our Mighty Demon ET Slayer gaskets are cut to allow full fuel flow to the booster.

Fig. 2

It's a Simple Investment for Success!

FBO ET Slayer Mighty Demon upgrade Includes:

2 Bottom Feeder N/S installed
Winged and notched float installed
1-pair jet extensions in rear bowl Installed
Set of NEVER Stick Gaskets