CNC Ported cyl. Heads
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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 | ||
