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Chevy SBC 350 175cc 59cc Straight Plug As Cast Bare Cast Iron Cylinder Head

Part #: PCE281.1749
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$185.00
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Brand: Speedmaster
Part Number: PCE281.1749
Part Type: Cylinder Heads
   
Cylinder Head Style: Bare
Cylinder Head Material: Cast Iron
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 59 cc
CNC-Machined Combustion Chamber: No
Intake Runner Volume (cc): 175 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): 1.940 in.
Exhaust Valves Included: No 
Exhaust Valve Diameter (in): 1.500 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" Intake, and 1.60" Exhaust, both +.100" length. While the 2.02" valves are standard issue, all of our 23deg. aluminum heads can accept a 2.05" intake valve with minimal additional work. Some of our CNC ported heads (PCE281.1354-1448) are designed around 2.05" Intake valves. Our cast iron heads use 1.94" intake valves, and 1.50" exhaust valves. For those racers looking for a head with 800+hp potential, step up to our new 15deg heads! These heads have room for huge 2.180"-2.200" intake valves. We even have the matching rockers!

Speedmaster CNC ported cylinder heads are machined on dedicated 4-axis and 5-axis CNC machining centers to ensure accuracy and cost effectiveness.

Combustion Chamber, Exhaust and Intake Ports all fully CNC machined for better flow. CNC combustion chambers offer superior control over flame travel and quench area. CNC Ported heads eliminate human error and variation from port to port. Unsurpassed repeatability from one cylinder head to another that is commonly found in "Hand porting & Polishing"

Combustion chambers are exact in volume - so every cylinder has the same compression ratio. Each port is the same cross section - so every cylinder can reach higher true RPM potential. CNC machining produces ports and chambers to within tolerances of no more than .002"; in turn every cylinder can reach the same power potential and accurate tuning.

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.

 

Related Article
Speedmaster™ Team


64 Stan Chatwood



Stan Chatwood began working on racecars at the age of 10, and began racing Motocross in the early 1970s. Since then he has worked on various pit crews in all sorts of racing from circle track racing to Alcohol Funny Cars. From 1978-1980 Stan Chatwood campaigned his Alcohol Funny Car in NHRA competition. Since then he has continued to work on pit crews and race teams all over.

In 2007 Stan tried his hand at circle track racing in the mini stock class where he won a couple of races. After gaining experience he graduated up to late models in 2009. He has raced all over the Southwest at racetracks such as Orange Show Speedway, Irwindale Raceway, The World Famous Bull Ring at Las Vegas Nevada, Havasu City Raceway.

He proudly carries the Speedmaster™ flag and is currently building a second late model to expand the Speedmaster™ team.

Specs of the Camaro

Cast Crankshaft - Speedmaster™
Connecting Rods - Speedmaster™ 4340 H Beam
Cylinder heads - Speedmaster™ Cast Iron Vortec
Intake Manifold - Speedmaster™
Rocker Arms - Speedmaster™
Air Cleaner - Speedmaster™
Valve covers - Speedmaster™
Pulley Kit - Speedmaster™
Water Pump - Speedmaster™
Alternator and Brackets - Speedmaster™
Header System - Speedmaster™
Fuel Pump and Regulator - Speedmaster™
HEI Distributor - Speedmaster™













18 Dave Scheidecker



Dave began his racing career in 1969. Dave is a 3 time Nascar Superlate Model Champion and 2 time Nascar Super Truck Champion holding the track record.

After a 7-year absence from behind the wheel, recovering from a race injury, he returned to the OrangeShow Speedway in 2008 as a drive again. 2014 marks his 44th year at his home track.

Dave also has the longest running steel/custom fabrication shop in Southern California, established in 1980.

Specs of the Camaro

Cast Crankshaft - Speedmaster™
Connecting Rods - Speedmaster™ 4340 H Beam
Cylinder heads - Speedmaster™ Cast Iron Vortec
Intake Manifold - Speedmaster™
Rocker Arms - Speedmaster™
Air Cleaner - Speedmaster™
Valve covers - Speedmaster™
Pulley Kit - Speedmaster™
Water Pump - Speedmaster™
Alternator and Brackets - Speedmaster™
Header System - Speedmaster™
Fuel Pump and Regulator - Speedmaster™
HEI Distributor - Speedmaster™













11 Jay Verduzco



Jay Verduzco has been a Speedmaster™ employee for almost a decade, beginning in the sales department and working his way up to Senior Operations Officer. Growing up in low-income family there were not very many opportunities to get behind the wheel.

Although nobody in his family had ever been involved in racing whatsoever, Jay knew he had to drive racecars. Determined to get behind the wheel he began to learn all that he could. Eventually getting behind the wheel of his very first car at age 15.

He has been building cars since before he was old enough to legally have a license and began drag racing at age 16. He has been competing in some type of racing ever since. Along with drag racing, Jay has participated in road course time trial events and circle track racing. So far he has raced at Auto Club Raceway Pomona at the famous 1/4" Mile Dragstip, Adams Motorsports Park, Irwindale Dragway and Orangeshow Speedway.

With the loyal support of Speedmaster™ and the Kencevksi family Jay Verduzco continues to advance his racing career, most recently proudly campaigning the Speedmaster™ Camaro in the Stock Car Class at Orange Show Speedway. He remains solidly in the top ten in points.

Specs of the Camaro

Cast Crankshaft - Speedmaster™
Connecting Rods - Speedmaster™ 4340 H Beam
Cylinder heads - Speedmaster™ Cast Iron Vortec
Intake Manifold - Speedmaster™
Rocker Arms - Speedmaster™
Air Cleaner - Speedmaster™
Valve covers - Speedmaster™
Pulley Kit - Speedmaster™
Water Pump - Speedmaster™
Alternator and Brackets - Speedmaster™
Header System - Speedmaster™
Fuel Pump and Regulator - Speedmaster™
HEI Distributor - Speedmaster™












Speedmaster™ X360 Project
by Tad Nelson Sema Show 2010




At the 2010 Sema Show, the Speedmaster stand incorporated a 1967 Camaro, as apart the of the Nelson Competition Products promotion. While NCP show off their Motorsport craftsmanship, they used Speedmaster components in restoring the classic muscle car.

SEMA - “The X360 Project began with an idea to build a 1969 Rally Sport Camaro. The car was to be placed as a featured show car in the Speedmaster booth at the 2010 SEMA Show. After an extensive search, Tad Nelson of Nelson Competition Products located a 1969 Camaro, which had been sitting in a barn in Wedron, Illinois, for 20 years. Like most uncovered automotive treasures, this car is a classic, just begging for a full, aftermarket restoration. As a next-generation classic car restorer, Nelson accepted the challenge and looks forward to showcasing his skills with the best in the industry”

Specs of the 1969 Camaro

Motor - Speedmaster™ 427 Small Block Chev (SBC)
Complete Cylinder Heads - Speedmaster™
Carburetor - 950CFM Speedmaster™
Intake Manifold - Speedmaster™ Polished Intake Manifold
Exhaust- Speedmaster™ Chrome Headers
Ignition- Speedmaster™ Ignition Kit
Complete Set of Control Arms - Speedmaster™

The engine reaches a near 600 Horsepower; For more information watch the video below:



















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