Speedmaster®
Chevy GM LS1 LS2 LS6 198cc 60cc 6-Bolt Hydraulic Roller Assembled Cylinder Heads
Overview
Specs
Brand: | Speedmaster |
Part Number: | PCE281.2090 |
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: | No |
Intake Runner Volume (cc): | 198 cc |
Exhaust Runner Volume (cc): | n/a |
CNC-Machined Intake Runner: | No |
CNC-Machined Exhaust Runner: | No |
Intake Port Shape: | Cathedral |
Intake Port Location: | Standard |
Exhaust Port Shape: | Oval |
Exhaust Port Location: | Standard |
Spark Plug Style: | OEM |
Comp. Valve Job: | No |
Intake Valves Included: | Yes |
Intake Valve Diameter (in): | 2.055 in. |
Exhaust Valves Included: | Yes |
Exhaust Valve Diameter (in): | 1.570 in. |
Valve Springs Included: | Yes |
Maximum Valve Lift (in): | 0.625 in. |
Outside Diameter of Outer Spring (in): | 1.290 in. |
Damper Spring Included: | Yes |
Number of Springs Per Valve: | Dual |
Retainers Included: | Yes |
Retainer Material: | Chromoly steel |
Locks Included: | Yes |
Lock Style: | 7 degree |
Valve Stem Seals Included: | Yes |
Valve Stem Seal Style: | Positive stop |
Rocker Arm Studs Included: | N/A |
Rocker Arms Included: | No |
Rocker Arm Nuts Included: | No |
Guideplates Included: | N/A |
Valve Cover Mounting Style: | Perimeter Bolt |
Accessory Bolt Holes Drilled: | Yes |
Intake Valve Angle: | 15 deg. |
Exhaust Valve Angle: | 15 deg. |
Valve Guides Included: | Yes |
Valve Guide Material: | Steel |
Valve Seats Machined: | Yes |
Valve Seat Machine Style: | 3-angle |
Valve Seat Material: | Ductile iron |
Steam Holes Drilled: | N/A |
Oiling Style: | Through pushrod |
Machined for O-Ring: | No |
Heat Crossover: | No |
Quantity: | Sold as a pair. |
Calculator: | Compression Calculator |
Description
Assembly Specifications
Max Lift: .625"
Coil Bind: 1.180"
Intake Install: 140lbs @ 1.8
Exhaust Install: 140lbs @ 1.8
Open Seat Pressure: 335lbs @ .600 lift
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.