GM LS1 243 CNC Ported Heads

GM LS1 243 CNC Ported Heads

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GM LS1 243 CNC Ported Heads

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Product Name Price Qty
LME LS1 243 CNC Ported Heads w/ Expedited Core Exchange or Outright Purchase
$2,179.00
LME LS1 243 CNC Ported Cylinder Heads w/ Core Exchange
$1,929.00

Many hours of R&D have gone into the development of this stout catherdral port CNC program. With outstanding flow numbers and an efficient port shape, the LME CNC ported LS1 243s bring value and performance together. 


There are multiple methods of obtaining a set of LME CNC ported heads perfectly sculpted for your hot rod: 


Standard Core Exchange - We will swap out your useable cylinder heads with a freshly ported and prepaired set once we recieve them via your prefered shipping method or drop-off. Therefore, you will not be charged for the core exchange. 


Expedited Core Exchange - We will ship you a set of CNC ported heads fresh out of the machine and set up to your cam specs once the order is placed. Once your usable cores have made their way to us, LME will refund the cost of the cores. 


Current GM LS1 243 Cylinder Head core value is $250.00 


**No matter what method you choose, once order is placed, LME will contact you to ensure the best option is used for you or your shop. We will cover any details and clearify any question or concerns you may have. We will also seek out all possible information of the build to better provide the best service and parts for your project. This expedited service allows you or your installation shop to have all the parts in hand to complete a CNC ported head install without the down time and hassle of waiting on ported heads to arrive.

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Description

Many hours of R&D have gone into the development of this stout catherdral port CNC program. With outstanding flow numbers and an efficient port shape, the LME CNC ported LS1 243s bring value and performance together. 

There are multiple methods of obtaining a set of LME CNC ported heads perfectly sculpted for your hot rod: 

Standard Core Exchange - We will swap out your useable cylinder heads with a freshly ported and prepaired set once we recieve them via your prefered shipping method or drop-off. Therefore, you will not be charged for the core exchange. 

Expedited Core Exchange - We will ship you a set of CNC ported heads fresh out of the machine and set up to your cam specs once the order is placed. Once your usable cores have made their way to us, LME will refund the cost of the cores. 

Current GM LS1 243 Cylinder Head core value is $250.00 

**No matter what method you choose, once order is placed, LME will contact you to ensure the best option is used for you or your shop. We will cover any details and clearify any question or concerns you may have. We will also seek out all possible information of the build to better provide the best service and parts for your project. This expedited service allows you or your installation shop to have all the parts in hand to complete a CNC ported head install without the down time and hassle of waiting on ported heads to arrive.

Engine Overview

Details

## By specifying your cam lift LME will assemble your cylinder heads with the proper spring installed height. This will result in optimal spring pressures and coil bind distance for maximum performance. Please include rocker ratio to ensure accuracy. (example:  .650" lift with 1.8 ratio intake and exhaust)

 All Cylinder Heads Are Priced As Pairs  **CORE CHARGE WILL BE REFUNDED WHEN USEABLE CORES ARE RETURNED BY CUSTOMER

FLOW NUMBERS WITH 4.125" BORE @ 28" WATER
LIFT .100" .200" .300" .400" .500" .600" .700"   VALVE SIZE  
INTAKE  75  146  226  292  330  346  359    2.125"  
EXHAUST  63  127  171  216  254  265  271    1.590"  

*Flowed with radius inlet intake/no pipe exhaust

Intake Volume (cc)

320

Rocker Config.

GM LS1/LS2/LS6

Exhaust Volume (cc)

118

Intake Port Config.

GM LS1/LS2/LS6

Chamber Volume (cc)

61.5

Head Bolts/ Cyl.

4

Valve Guide Material

Factory Steel

Valve Angle (degrees)

12° x 3° cant In.

12° x 1.5° cant Ex.


LME Standard Head Porting Process

  • Clean carbon from intake exhaust and chambers (used cores)

  • Through inspection

  • Debur sharp edges

  • Valve guide clearance measured and adjusted for application

  • CNC ported intake exhaust and chambers

  • Competition valve job

  • Valve job hand blended into ports

  • Combustion chambers measured and adjusted for application

  • Meticulous final cleaning of cylinder head and components

  • Intake valves back cut with optimal angle for application

  • Heads assembled and spring pressure set up for specific cam lifts/application

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