Speedmaster®
Chrysler SB 318 360 190cc 68cc CNC Hydraulic Roller Assembled Cylinder Heads
Overview
Specs
| Brand: | Speedmaster |
| Part Number: | PCE281.2151 |
| Part Type: | Cylinder Heads |
| Cylinder Head Style: | Assembled |
| Cylinder Head Material: | Aluminum |
| Cylinder Head Finish: | Natural |
| Combustion Chamber Volume (cc): | 68 cc |
| CNC-Machined Combustion Chamber: | Yes |
| Intake Runner Volume (cc): | 190 cc |
| Exhaust Runner Volume (cc): | n/a |
| CNC-Machined Intake Runner: | Yes |
| CNC-Machined Exhaust Runner: | Yes |
| Intake Port Shape: | Standard Magnum |
| Intake Port Location: | Standard |
| Exhaust Port Shape: | Standard Magnum |
| Exhaust Port Location: | Standard |
| Spark Plug Style: | Standard |
| Comp. Valve Job: | No |
| Intake Valves Included: | Yes |
| Intake Valve Diameter (in): | 2.020 in. |
| Exhaust Valves Included: | Yes |
| Exhaust Valve Diameter (in): | 1.620 in. |
| Valve Springs Included: | Yes |
| Maximum Valve Lift (in.): | 0.580 in. |
| Outside Diameter of Outer Spring (in.): | 1.450 in. |
| Damper Spring Included: | Yes |
| Number of Springs Per Valve: | Dual |
| Retainers Included: | Yes |
| Retainer Material: | Chromoly Steel |
| Locks Included: | Yes |
| Lock Style: | 10 Degree |
| Valve Stem Seals Included: | Yes |
| Valve Stem Seal Type: | Positive Stop |
| Rocker Arm Studs Included: | No |
| Rocker Arms Included: | No |
| Rocker Arm Nuts Included: | No |
| Guideplates Included: | No |
| Valve Cover Mounting Style: | Perimeter Bolt |
| Accessory Bolt Holes Drilled: | Yes |
| Intake Valve Angle: | Standard |
| Exhaust Valve Angle: | Standard |
| 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 as a pair. |
| Calculator | Compression Calculator |
Description
Chrysler 318 - 360: (PCE281.1773) Cast Iron
Intake - Mopar #4876049
Exhaust - Mopar #MS95480
Chrysler 318 - 360: (PCE281.1654) Aluminum
Intake - PCE349.1010 or FelPro 1213
Exhaust - SM3275 or Felpro 1413
HEAD GASKETS
The PCE281.1776 4-cyl. head is designed around an OEM head gasket. Use Mopar # P4452006. We recommend you use Fel Pro head gaskets under our Speedmaster PCE281.1728, PCE281.1731 & PCE281.1733 heads. Use Fel P5ro #1009 or 1105 (big bore) On Speedmaster PCE281.1773 we recommend the Fel Pro #519SD ( on Magnum Engines), or #1008 (on LA-series Engines). For the new Speedmaster PCE281.1654 Aluminum heads, we only recommend using Speedmaster PCE348.1010 or Felpro #1008 head gaskets.
HEAD BOLTS / STUDS
For the PCE281.1776 4-cyl. head, use ARP #241-3701 (bolts) or #241-4701 (studs), and follow ARP's recommended torque values. Also, make sure you follow the OEM torque sequence! For the PCE281.1728, PCE281.1731 and PCE281.1733 use Speedmaster head stud kit PCE279.1018. Torque to 65lbs. using high pressure Moly lube on the threads and under the heads. The Arp #'s for the Big Block 440 heads are #145-3609 (bolts) and #145-4206 (studs) For the Small Block Chrysler heads, use Speedmaster PCE279.1017 head stud kit and torque the heads to 65lbs with Moly Lube.
SPARKPLUGS
For the 4-cyl. Chrysler head, use the following: Autolite 65, or AP65 Champion RN12YC or 3405 NGK GR4 or GR4GP
For the V8 Chrysler heads, the following is a small list of spark plugs you can use: NGK - BCPR6ES, R5671A-7, R5671A-8 Autolite - 3923, 3924, AR3933, AR3934 Champion - RC12YC, RC10YC4, RC9YC3
Remember that you need a COLDER plug when you make more power, ie. N2O, turbo and Supercharging
Brand Information
In 1979, the company was founded with Pete's Performance, which was a small speed workshop. It began by building engines for customers as a hobby, and it has now grown to include selling, assembling, manufacturing and racing high performance engine parts. Over the years, the company has grown into a worldwide high performance powerhouse. Growing from a one-man bricks-and-mortar business; to now a supply chain in which entails more than 400+ people all across the world. Today, Pete's Performance has evolved into the internationally known Speedmaster: which has distribution centres and offices is Sydney, Los Angeles and Shanghai.