Chevy SBC 350 Vortec 185cc 64cc Straight Cast Iron Bare Cylinder Head

Description

Chevy SBC 350 Vortec 185cc 64cc Straight Cast Iron Bare Cylinder Head
PCE281.1756
Brand:
Speedmaster
Part Number:
PCE281.1756
Part Type:
Cylinder Heads
Cylinder Head Style:
Bare
Cylinder Head Material:
Cast Iron
Cylinder Head Finish:
Natural
Combustion Chamber Volume (cc):
64 cc
CNC-Machined Combustion Chamber:
No
Intake Runner Volume (cc):
185 cc
Exhaust Runner Volume (cc):
n/a
CNC-Machined Intake Runner:
No
CNC-Machined Exhaust Runner:
No
Intake Port Shape:
Square
Intake Port Location:
Standard
Exhaust Port Shape:
Square
Exhaust Port Location:
Standard
Spark Plug Style:
Straight
Comp. Valve Job:
No
Intake Valves Included:
No
Intake Valve Diameter (in):
2.020 in.
Exhaust Valves Included:
No
Exhaust Valve Diameter (in):
1.600 in.
Valve Springs Included:
No
Damper Spring Included:
No
Retainers Included:
No
Locks Included:
No
Valve Stem Seals Included:
No
Rocker Arm Studs Included:
No
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
No
Valve Cover Mounting Style:
Center & Perimeter Bolt
Accessory Bolt Holes Drilled:
Yes
Intake Valve Angle:
23 deg.
Exhaust Valve Angle:
23 deg.
Valve Guides Included:
Yes
Valve Guide Material:
Bronze
Valve Seats Machined:
Yes
Valve Seat Machine Style:
3-angle
Valve Seat Material:
Ductile iron
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Heat Crossover:
No
Quantity:
Sold individually.
Calculator
Compression Calculator
All Speedmaster 23deg. Small Block Chevy heads are available with Straight or Angled sparkplugs. Standard valve sizes are 2.020 in. Intake, and 1.600 in. Exhaust, both +.100 in. length. While the 2.02" valves are standard issue, all of our 23deg. aluminum heads can accept a 2.050 in. intake valve with minimal additional work.
HEAD GASKETS
The head gasket we recommend for our 23deg. heads used on 327/350/383/400 SBC engines without steam holes is Felpro #1003. On engines using the GM 400 block, or aftermarket blocks with steam holes, use Speedmaster PCE348.1006 or Felpro #1014.
INTAKE GASKETS
Our heads are manufactured with both the conventional intake manifold bolt pattern, and the Vortec bolt pattern. If you're installing a Vortec manifold, use Felpro #1255 gaskets. If you are using a convential intake manifold, use Speedmaster PCE349.1002 or Felpro #1266 gaskets.
PUSH RODS
Our aluminum 23deg. heads typically use +.100" (longer than stock) pushrods, Depending on the components used, it is possible that you may need pushrods shorter or longer than that so we recommend that you use an adjustable pushrod to dial in your rocker geometry and order pushrods to match.
SPARK PLUGS
All Speedmaster 23deg. SBC heads use standard 14mm. x 750" reach, 5/8 hex, gasket seat sparkplugs like NGK R5671A-7, Autolite 3924, Champion RC12YC, etc. Remember that higher compression/ boost require a colder heat range sparkplug.
HEAD BOLTS / STUDS
Our 23 degree heads utilize standard head bolts or studs. Our part number for head bolts is PCE279.1002, and the head studs are PCE279.1001. For the 15 degree heads, we recommend SM2451-15DEG. headstud kit with 3/8" reduced shank on the studs between intake ports. The ARP head bolt part number is 134-3601, and ARP head studs 234-4301 for the 23 degree heads. ARP also makes a head stud kit that is compatible with our 15deg. heads on cast iron blocks with part number 234-4723.
EXHAUST GASKETS
We recomend the use of our Exhaust gaskets # SM5120 or Fel-Pro #1405 on our 23 degree heads. On our 15 degree heads, use SM5121 or Fel-Pro #1409.