Lingenfelter CNC Ported LS3 / L92 Cylinder Heads-2 Complete New Heads

Lingenfelter CNC Ported LS3 / L92 Cylinder Heads-2 Complete New Heads

w/ Inconel exhaust valves, 16 Powdered metal guides, installed and correctly sized and Lingenfelter L230075897 double springs, titanium retainers, locks, seals

Lingenfelter offers a CNC ported version of the L92/LS3 aluminum cylinder head used on 2008-2013 production 6.2L based Chevrolet Corvettes, Camaro SS and various 2007-2008 L92 L76 6.2L and 6.0L based GM trucks.

The port and chambers are carefully designed to provide the best combination of high flow capabilities. This combination provides excellent horsepower gains. Lingenfelter L92/LS3 cylinder heads are precision CNC machined on our in house 5 axis CNC machine to insure that tight tolerances are maintained. The Lingenfelter CNC porting procedure is a computer controlled machining operation that duplicates details from a finished Lingenfelter hand ported cylinder head. Hand porting is a very labor intensive and time-consuming procedure that takes years to perfect.

By CNC porting the cylinder heads the high cost of hand porting is reduced, plus the CNC porting is more consistent and will produce better results. Each CNC ported cylinder head will have the same port and chamber configuration as the original master used to develop the CNC program. Following porting each head receives: Precision 3 angle valve job to maximize flow & provide extended life, CC checking chamber size for correct compression, surfacing to insure deck flatness, deburring, pressure testing, professional assembly, setting spring height & checking all tolerances, and serial number.

Intake runner volume - LPE CNC: 275cc - Stock GM: 261cc
Exhaust runner volume - LPE CNC: 93cc - Stock GM: 89cc

Base price package includes porting new (select above) or your supplied cylinder heads
Stock 2.165 intake valves
Stock 1.59 exhaust valves
Stock retainers, locks, and valve seals
Minimum of 4 bore size recommended flow numbers are measured on 4.125 bore

Flow numbers are measured on 4.125 bore

LPE CNC L92 LS3 Flow Specs
Intake valve lift / Exhaust valve lift
.200 - 158 cfm / .200 - 116 cfm
.300 - 230 cfm / .300 - 161 cfm
.400 - 282 cfm / .400 - 201 cfm
.450 - 302 cfm / .450 - 213 cfm
.500 - 322 cfm / .500 - 220 cfm
.550 - 340 cfm / .550 - 226 cfm
.600 - 350 cfm / .600 - 231 cfm
.650 - 358 cfm / .650 - 234 cfm
.700 - 344 cfm / .700 - 237 cfm

Watch Lingenfelter's 5 axis Boston CNC in action click on the link below. Lingenfelter CNC Machine Video Page

Intake valve lift (inches)	.200	.300	.400	.450	.500	.550	.600	.650	.700
stock intake	156	226	276	294	310	324	332	332	308
LPE CNC intake 4.065" bore*	156	228	280	300	320	336	346	352	340
LPE CNC intake 4.125" bore*	158	230	282	302	322	340	350	358	344

Flow differences are purely from the flow fixture bore size difference. The same CNC program and the same head cylinder was tested on both bore sizes.