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Ford Heads

 

CLEVELAND CHI CNC

COMPETITION PORT HEADS- 244CC

 

 

TECHNICAL SPECIFICATIONS :
Intake Valve Diameter: 2.125">2.150"
Exhaust Valve Diameter: 1.650"
Intake Port Volume: 244cc
Exhaust Port Volume: 122cc
Chambers CNC Machined Yes
Chamber Volume: 60-67cc
Spark Plugs  
Minimum Intake CSA 2.700"
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 4.000"
Exhaust Flow figures with pipe          No

 

 

VALVE LIFT
.100" .200"
.300"
.400"
.500"
.600"
.700"
.800"
.900"
1.000"
Intake Flow @28" H2O ( 2.125" ) 74.1 147 207.2 264.3 308.5 339.9 359.8 370.7    
Exhaust Flow @28" H2O 53 106.9 147.8 176.6 198.8 214.6 225.4 232.3    

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 cylinders produce 640+HP on our 393 Cleveland combo by 7200 RPM with a Solid Flat Tappet camshaft, pump fuel and 4150 carby.( Long Engine Package # L393C3/A2 ) Click Here for More details.
These heads have produced 603 Ftlbs and 692HP on a 434 with a Hydrualic Roller Camshaft / 4500 Carby and pump fuel and capable of producing well over 750 HP with a Solid Roller Camshaft

Power produced with off the shelf Pacemaker 2.000" primary pipe size extractors

We also have a CNC program to port intake for straight fit onto 9.2 & 9.5" Deck Height Cleveland & Windsor Blocks - Call

 

 

Description Pavtek Part # Price  
5 AXIS CNC PORTING ONLY:    

5 Axis CNC Competition Porting - CHI 208 CASTING -Chambers/ Intake/ Exhaust -

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

CNC351C403 $ 1397
     
Assembled Cylinder Heads - Suit Hyd Roller / Street Roller or Solid Cam
H351C403S $ 4250

Consists of :

  Outright
CHI 208 Raw Castings    
Valves - New Stainless Steel Intake & Exhaust  - 2.150"x1.650"    
Springs - Dual HP ( EITHER ISKY OR CRANE )    
Retainers - New Chrome Moly Retainers    
Valve spring locaters    
Valve Locks - Comp Cams Chrome Moly 10 Degree    
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