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STORE SPECIALS

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LS Series Heads

LS1 CNC PORTED

ASSEMBLED CYLINDER HEADS WITH NEW SS VALVES

 

 

TECHNICAL SPECIFICATIONS :
Intake Valve Diameter: 2.020"
Exhaust Valve Diameter: 1.570"
Intake Port Volume: 222cc
Exhaust Port Volume: 83cc
Chambers CNC Machined Yes
Chamber Volume: 64-71cc
Minimum Intake CSA x.xxx"
Maximum Intake CSA x.xxx"
Minimum Exhaust CSA x.xxx"
Maximum Exhaust CSA x.xxx"
Intake Seat Angle 45
Exhaust Seat Angle 45
Flow Test Bore Size 3.910"
Exhaust Flow figures with pipe          NO

 

VALVE LIFT
.100" .200"
.300"
.400"
.500"
.600"
.700"
.800"
.900"
1.000"
Intake Flow @28" H2O 65.6 150.1 216.1 248.1 263.5 282.2 296.4 306.5 309.3 311.5
Exhaust Flow @28" H2O 51.8 104.9 140.4 166 194 204.8 216 218.6 221.8 227.1

Flow figures are not inflated for sales purposes.

Calibration is performed on both Intake & Exhaust side of bench from 50 to 450 cfm using 11 sharp edge orifice plates.

Flow bench numbers should not be the primary concern when purchasing your next set of cylinder heads.

Porting for Power ! NOT Flow Bench Numbers - Click Here for more info

 

RECOMMENDED USE AND INFO:

These CNC ported LS1 cylinder heads have enough airflow to produce over 570HP normally aspirated. We focused on stopping the dreaded factory intake high lift turbulance and increasing the airflow without extensively enlarging the runners as they are relatively large from GM standard. Special attention however was paid to the exhaust side of the cylinder head.

Description Pavtek Part # Price  
5 AXIS CNC PORTING ONLY:    

5 Axis CNC Competition Porting - Chambers/ Intake/ Exhaust -

Does not include cleaning, crack testing, valve guides, milling etc.

CNC346L401 $ 965
     
Assembled Cylinder Heads - LS1 853 & 241 Castings 
H346L401HR $ 2790

Consists of :

   
Valves - New Stainless Steel Intake & Exhaust  - Ferrea    
Springs - New Beehive    
Retainers - OEM    
Valve Locks - Comp Cams Chrome Moly    
Valve Stem seals - New OEM    
5 Axis CNC Competition Porting - Chambers/ Intake/ Exhaust    
Multiangle Valve Seat Geometry    
Backcut valves    
K- Line bronze valve guides - honed    
Surface milled    
Springs measured & setup to suit cam to be used    
Final washed and assembled    
     
LS1 CNC Head & Cam Package Are Available
  Call

CUSTOM LS SERIES CAMSHAFTS AVAILABLE - FROM $ 585

NEW OEM REPLACEMENT LIFTERS AVAILABLE - VL115/A FROM $ 212

DUAL SPRING UPGRADE ALSO AVAILABLE - CALL

 

ALL PRICING ABOVE IS BASED ON CHANGE OVER OR MACHINING OF YOUR CYLINDER HEADS.

CORES ARE AVAILABLE AT AN ADDITIONAL CHARGE- CALL FOR CURRENT PRICING.