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(US Patent #5,007,387)
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Chevrolet High Port
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B-Series Stage 2 Port
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B-Series Stage 3 Port
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C-Series Stage 2 Port
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C-Series Stage 3 Port |
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Download Information Brochures |
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DYNO Charts |
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Explanation and Applications for B and C heads and Stage II or III
porting |
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B designates the maximum valve
sizes that will fit into a 4.0 to 4.060 bore. These valve sizes are:
Intake valves 2@ 1.650 each. Exhaust valves 2@ 1.400 each. |
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The II and III designate the stages of
porting. |
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B-II porting has a port area
approximately equal to a 220 cc runner. This is a Fel-Pro 1207 (Chevy) or
Fel-Pro 1262 (Ford) gasket. (The runner volumes are not directly comparable
because of the different lengths of the runners and the runners are
divided into a one into two Y to supply both valves). This is why we refer
to a cross sectional area of the port. Comparing the port to a Fel-Pro 1207
(Chevy) or Fel-Pro 1262 (Ford) for a stage II port and a Fel-Pro 1209 for a
stage III port.
This porting is recommended for a street use 350 or 383
cu in (Chevy) motor or 302, 351, or 408 cu. in. (Ford) motor. It has high
port velocity for good, all around torque. Along with the high flowing, low
and mid valve lift numbers building huge mid range torque, numbers
incomparable to any 2 valve heads.
Horsepower numbers in
the 650+ hp range are very attainable, with street useable torque
characteristics.
B-Series Stage 2 Port |
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B-III porting is approximately
equal to a 265 cc runner, or a Fel-Pro 1209 (Chevy) or Fel-Pro 1262 (Ford)
gasket. This head is intended for a 350cu.in. to 383cu.in. and larger for
all out competition. The huge port volume yields flow in the 368cfm+ range,
along with huge low and mid range lift flow. Remember this is where
the cylinder is getting fully filled and fully excavated.
Meaning, more air
ingested and excavated having a directly linear relationship on sheer
horsepower. Horsepower numbers in the 750+ range.
Race oriented due to
port velocity but street useable on a large displacement motor. In other
words, not recommended for street use on a 350 or 351, but for a larger
displacement motor, it would be OK |
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B-Series Stage 3 Port |
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C designates the maximum valve
sizes that will fit into a 4.125 or larger bore. These valve sizes are:
Intake valves 2@ 1.720 each. Exhaust valves 2@ 1.450 each.
This head is intended
for engine sizes of 406 cu. in or larger |
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| The II and III designate the
stages of porting. |
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C-II
porting also has a port area approximately equal to a 220cc runner. This is
again a Fel-Pro 1207 (Chevy) or Fel-Pro 1262 (Ford)
gasket. Street useable
on motors 406 cu in and larger.
C-Series Stage 2 Port |
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C-III
porting has a runner volume approximately equal to a Fel-Pro 1209
(Chevy) or Fel-Pro 1262 (Ford)
gasket. This is the head
that can approach 1000 horsepower normally aspirated on a large high
compression racing engine. Not recommended for street use in light cars with
a high stall, or low drag gears with a manual transmission, unless you
have a motor over 406 cu. in. with a frame and body that will handle the
immense torque.
(note: these heads will produce torque and horsepower that will LITERALLY
rip a car apart) |
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C-Series Stage 3 Port |
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Notes on forced induction or nitrous.
The supercharging, nitrous oxide or turbo-charging of these heads is truly
phenomenal. This severe duty has been built-into the design of the 32Valve
Heads. In that, both the thick combustion chamber skull and the increased
breathing of both the intake and exhaust ports which come into play to yield
truly amazing and unexpected results. The centrally located spark plug and
the 360 degree squish towards the plug yields both the shortest flame front,
the fastest burn, and the least tendency to detonate of all the combustion
chamber shapes possible.
Download
Information Brochures
B1 and C1 are also available as special orders
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A-Series Stage
1 Port |
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- Intake valves 2@
1.600 dia. 322 CFM flow
- Exhaust valves 2@ 1.400
dia. 252 CFM flow
- Stage I designates no
porting, as cast
- Has port area equal to a
200 cc runner
- Recommended for street use
on 350 cu in
- Horsepower from 475 to
575HP
- Use standard intake
manifolds, cam, pistons to 10.5:1 comp ratio, Hooker or Stahl 7 bolt
pattern exhaust headers
- Kits include PR heads
completely assembled, valve covers, rockers, head bolts, head
gaskets and pushrods.
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Top |
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$5999.00 |
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B-Series Stage
2 Port |
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B designates the
largest valves for a 4 to 4.060 bore. These valve sizes are: Intake
valves 2@ 1.650 each.
Exhaust valves 2@ 1.400 each.
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II designates the
stage of porting. Stage II porting has a port area approximately equal
to a 220cc runner. This is a Fel-Pro 1207 (Chevy) or Fel-Pro
1262 (Ford) gasket. This porting is recommended for a street
use 350 or 383 cu in motor (Chevy) or 302, 351 or 408 cu in
(Ford) motor. It has a high port velocity for good, all around
torque, as well as high flowing low and mid lift numbers.
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Horsepower numbers
from 475 to 650 hp.
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Use standard intake
manifolds, cams, pistons to 10.5:1, and Hooker or Stahl 7 bolt pattern
exhaust (Chevy) or Motor n Sports (Ford) header
flanges. Accessory holes in ends of heads.
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Kits include Pr. of valve covers, Pr.
of heads completely assembled, Pr. of head gaskets, notched for
pushrod clearance (Chevy only), Set of 16 pushrods (Ford and
Chevy), Set of head bolts (Chevy only).
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Milled aluminum
head
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Intake 348
CFM Exhaust 280CFM
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Options: High rev
springs. Combustion chamber volumes from 62cc to 76cc
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Chevy B-2 Flow Chart |
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Top |
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$6999.00 |
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B-Series Stage
3 Port |
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B designates the
largest valves for a 4 to 4.060 bore. These valve sizes are: Intake
valves 2@ 1.650 each. Exhaust valves 2@ 1.400 each.
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III designates the
stage of porting. Stage III porting has a port area approximately
equal to a 265cc runner or a Fel-Pro 1209
(Chevy) or
Fel-Pro 1262R (Ford)
gasket. This head
is intended for a 350 cu in to 383 cu in and larger (Chevy) or
351 or 408 cu in (Ford) for all out competition. The large
ports yield flow in the 368cfm+ range, along with huge low and mid
range lift flow.
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Horsepower numbers
in the 750+ hp range.
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Use standard
intake manifolds, cams, pistons to 10.5:1, and Hooker or Stahl 7 bolt
pattern exhaust
(Chevy) or Motor n Sports (Ford)
header
flanges. All accessory holes in ends of heads.
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Kits include: Pr
valve covers, Pr. of heads completely assembled, Pr. of head gaskets,
notched for pushrod clearance
(Chevy only),
Set of 16 pushrods
(Ford and Chevy),
Set of head bolts
(Chevy only).
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Intake 356 CFM
Exhaust 287 CFM.
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Milled
aluminum head
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Options: High rev
springs. Combustion chamber volumes from 62cc to 76cc
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Chevy B-3 Flow Chart |
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Top |
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$7499.00 |
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C-Series Stage 2 Port |
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C designates the
maximum valve sizes that will fit into a 4.125 or larger bore. These
valve sizes are: Intake valves
2@1.720
each. Exhaust valves
2@1.450
each. This head is intended for engine sizes of 406 cu in or larger.
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II designates the
stage of porting. Stage II porting has a port area approximately equal
to a 220cc runner. This is again a Fel-Pro 1207
(Chevy) or Fel-Pro 1262 (Ford)
gasket. Street
usable on motors 406 cu in (Chevy) or 400 cu in (Ford)
and larger.
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Horsepower numbers
in the 800+ hp range.
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Use standard
intake manifolds, cams, pistons to 10.5:1, and Hooker or Stahl 7
bolt pattern exhaust
(Chevy) or Motor n Sports (Ford)
header
flanges. All accessory holes in ends of heads.
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Kits include: Pr.
Valve covers, Pr, of heads completely assembled, Pr. Of head
gaskets notched for pushrod clearance
(Chevy only),
Set of 16 pushrods
(Ford and Chevy),
Set of head bolts
(Chevy only).
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Intake 374 CFM
Exhaust 292 CFM
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Milled
aluminum head
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Options: High rev
springs. Combustion chamber volumes from 66cc to 80cc
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Chevy C-2 Flow Chart |
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Top |
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$7999.00 |
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C-Series Stage 3 Port |
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C III porting has a
cross sectional area of the port approximately equal to a 265cc runner
on a standard head. It uses a Fel-Pro 1209 gasket. Can approach 1000
hp normally aspirated on a large displacement high compression racing
engine. Not recommended for street use unless motor 406 cu in
(Chevy) or
400 cu in (Ford)
and larger. This is
the top head for the standard 23 degree (Chevy) or standard
(Ford) manifold.
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Horsepower numbers in
the 1000 hp range.
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Use standard intake
manifolds, cams, pistons to 10.5:1, and Hooker or Stahl 7 bolt pattern
exhaust (Chevy) or Motor n Sports (Ford) header
flanges. All accessory holes in the ends of the heads.
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Kits include: Pr. Valve covers, Pr.
of heads completely assembled, Pr of head gaskets notched for pushrod
clearance (Chevy only), set of 16 pushrods (Ford and Chevy),
Set of head bolts (Chevy only).
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Intake 389 CFM
Exhaust 303 CFM
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Milled aluminum head
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Options: High rev
springs. Combustion chamber volumes from 66cc to 80cc
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Chevy C-3 Flow Chart |
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Top |
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$8499.00 |
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Chevy raised Runner |
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for 18degree manifolds
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Intake flow 419 CFM
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Exhaust flow 305 CFM
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Chevy Raised Runner Flow Chart |
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Top |
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$9999.00 |
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Chevy High Port |
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The maximum Small
Block Chevy head BAR NONE!
This
is the biggest, baddest head possible.
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Head is a full 5
tall from head gasket face to valve cover sealing edge. This is so the
intake port can start way up at the top of the head and have a
straight, near vertical run at the back of the intake valves. The
whole back side of both intake valves can be seen from the port.
NO COMPROMISE!
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Horsepower Unlimited,
how good is your engine builder.
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Sheet metal intake
manifolds must be used on the intake.
NO COMPROMISE FOR PERFORMANCE!
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8 exhaust ports per
head necessitates special headers with either a 2 into 1 Y or
eight pipes per side.
NO COMPROMISE FOR MAXIMUM PERFORMANCE!
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Uses standard high
performance cams and standard pistons to 10.5:1 comp ratio.
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Intake 440 CFM!
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Exhaust 335CFM!
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A race only head.
Dont even think about it for the street.
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Fully water jacketed
billet aluminum head
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This is the head that will set every record for the small block Chevy.
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Special orders only.
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Chevy High Port Flow Chart |
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Top |
Starting at: |
$10,999.99 |
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E-Mail us for prices and further information. Please
include: Your Name, Address, Phone Number, E-Mail Address, and Engine Model
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Special Orders |
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Back
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Sean's Creations.
Copyright © 2001 Arao Engineering Inc. All rights reserved.
Revised:
08/07/07
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