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Ford Heads

 

CLEVELAND RAISED RUNNER

CNC COMPETITION PORT HEADS- 275CC

 

 

TECHNICAL SPECIFICATIONS :
Intake Valve Diameter: 2.150" > 2.190"
Exhaust Valve Diameter: 1.650"
Intake Port Volume: 275cc
Exhaust Port Volume: 122cc Minimum- Various Programs Available
Chambers CNC Machined Yes
Chamber Volume: 60-67cc
Spark Plugs  
Minimum Intake CSA 2.900"
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 4.155"
Exhaust Flow figures with pipe          Various Programs available

 

 

VALVE LIFT
.100" .200"
.300"
.400"
.500"
.600"
.700"
.800"
.900"
1.000"
Intake Flow @28" H2O ( 2.150" ) 72.9 153.6 225.7 287 336.2 369.4 3709.9 376.9 385.8

388.8

Exhaust Flow @28" H2O                    

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:

Suitable for 408+ cubes Windsor/Cleveland stroker engines.

These cylinders heads produce 785HP on our 434 Eliminator Package by 7500 RPM with a Solid Roller camshaft on pump fuel and off the shelf pacemaker headers.( Long Engine Package # L434C5/ARR ) Click Here for More details.

Heads have produced over 800HP with Racefuel.

Also has produced 680hp from 408 Cubes with Solid Flat tappet camshaft & pump fuel (7500rpm)

Heads must be used with a minimum extractor primary pipe size of 2.000", Can be used with off the shelf 2.000" Pacemaker headers

 

 

 

Description Pavtek Part # Price  
     
Assembled Cylinder Heads - Suit Solid Roller Camshaft
H351C0414R $ 6510

Consists of :

  Outright
Raised Runner Raw Castings    
Valves - New Stainless Steel Intake & Exhaust ( 5/16 stem )    
Springs - Pac Roller Springs ( .850" lift max)    
Retainers - New Titanium Retainers ( Manley)    
Valve spring locaters    
Valve Locks - Pac 10 Degree Chrome Moly    
Valve Stem seals - Crane teflon    
5 Axis CNC Competition Porting - 100% Intake/ Exhaust/ Chambers    
Multiangle Valve Seat Geometry    
Backcut valves    
Valve guides clearance checked & honed if required    
Surface milled to your desired CC's ( 60 to 67 CC's )    
Springs measured & setup to suit cam to be used    
Final washed and assembled