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Speedmaster®

Chevy GM LS3 L92 L76 250cc 64cc Hydraulic Roller Assembled Cylinder Heads

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MPN: PCE281.2091 UPC: 840136563167
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US $609.00 US $1,015.00
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Available: 1

Overview

Speedmaster LS-series cylinder heads are rapidly expanding. The LS (Gen3/4) platform has many design benefits over the earlier SBC engine designs, most notably the cylinder heads. Although the GM heads are good pieces, We have developed a superior line of heads for modern performance enthusiasts. Like all Speedmaster cylinder heads, the LS-series heads are produced using our "Gravity Casting" process. This process ensures a more uniform and robust casting, laying a strong platform to build on.

Specs

Brand:Speedmaster
Part Number:PCE281.2091
Part Type:Cylinder Heads
  
Cylinder Head Style:Assembled
Cylinder Head Material:Aluminum
Cylinder Head Finish:Natural
Combustion Chamber Volume (cc):64 cc
CNC-Machined Combustion Chamber:No
Intake Runner Volume (cc):250 cc
Exhaust Runner Volume (cc):n/a
CNC-Machined Intake Runner:No
CNC-Machined Exhaust Runner:No
Intake Port Shape:Rectangular
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):2.165 in.
Exhaust Valves Included:Yes
Exhaust Valve Diameter (in):1.600 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

Prop 65 Warning

This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.


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