Speedmaster®

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

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MPN: PCE281.2091 UPC: 840136563167
Unavailable Extended Warranty Unavailable
US $972.50

Build to Order

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Overview

Speedmaster LS-series cylinder heads is 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. Take a look below at our offerings, surely you will find a head to suit your application. If you require any additional information, or help selecting the correct cylinder head for your application, please feel free to call one our techs.

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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