The First and
Only Air Induction and Filter Housings Designed for '87-'95
Full Size GM Light Trucks Equipped with V-8 or V-6 TBI motors.
horsepower you can buy!
Refer to the above
image to see a component "blow up" of the racing performance air
induction and filtration system and a photo of a typical racing
performance installation. The air induction and filtration housings
are made of spun aluminum and have a "brush" finish.
OF RACING PERFORMANCE AIR INDUCTION AND FILTRATION SYSTEM
cleaners for Throttle Body Injection (TBI) intake systems
exhibit large static pressure drops between the ambient air
and the inlet to the TBI. The pressure drop in the air filtration
system is caused by the:
- Small size
of the filter element flow area (driven by height and
outside diameter of the annular ring shaped filter element),
which causes high velocity air flow through the filter
- Flow resistance
of the ducts, silencers, and inlet horn that feed the inlet air
into the filter-housing, note: factory components are often purposely
undersized to limit horsepower of engine. The Alcone system is
noisy, it recaptures the "moan" of a big 4 barrel carburetor.
- Flow resistance
and turbulence within the filter housing caused by the
need to turn the flow 90 DEG from horizontal to vertical
in order that it may enter the intake system and the need
to accelerate the air flow from a low velocity at the
relatively large outer surface of the filter to a higher
velocity at the inlet to the TBI.
and change of direction losses within the TBI caused by
the air flow entering its intake in a swirling or turbulent
- Uneven flow
distribution caused by the factory air horn, which focuses
the inlet air over a very small area on one side of the
The Alcone Engineering
air induction and filtration system addresses each of these
- A taller,
larger diameter filter element is provided to increase
the cross sectional area of the filter thereby reducing
the flow velocity through the filter element. The
larger filter area and lower flow velocity reduces the
pressure drop through the filter and improves filtration
since the air stays within the filter for a longer time.
- Ducts, silencers
and inlet horn are eliminated, in favor of 360-degree
inlet of the air thereby ensuring an even distribution
of airflow over the entire TBI inlet area.
vane and guiding surfaces are provided within the housing
to direct the inlet air with minimal frictional losses
- The housing
is configured to provide a maximum velocity stack height
(as practical within hood to TBI inlet flange clearance
restrictions) giving the flow time to straighten and stabilize
prior to entering the TBI or carburetor.
Both single (center)
and dual mounting stud configurations of the Alcone Engineering
Inc. air induction and filter system are available so that all GM
light truck models that utilize the GM TBI intake system can be
Based on fuel consumption
on several trips between Albuquerque and Las Vegas, Nevada at an
average speed of 80 mph the average improvement in fuel consumption
was 1.88 mpg using the AEI air cleaner and the cold air induction
system over the factory induction system.
Based on 13 runs from
60 to 80 mph using the factory induction system and the AEI air
cleaner and the cold air induction system, the average improvement
in elapsed time was .78 seconds.
Test vehicle : '93
Chevy, 350 motor automatic with Jet Performance 6Pac chip, Mesa
headers, Random Cat, 3 inch exhaust, AEI air cleaner and cold air
Flow tests were
performed with housing installed on a 760 Holley carburetor