WINDSOR RHS CNC
“COMPETITION PORT” CYLINDER HEADS
RHS HEADS ARE NO LONGER AVAILABLE, BUT WE CAN STILL CNC PORT YOUR RHS HEADS
| TECHNICAL SPECIFICATIONS : | |
| Intake Valve Diameter: | 2.080″ |
| Exhaust Valve Diameter: | 1.600″ |
| Intake Port Volume: | 217cc |
| Exhaust Port Volume: | 77cc |
| Chambers CNC Machined | Yes |
| Chamber Volume: | 58-68cc |
| Spark Plugs | Angled |
| Minimum Intake CSA | 2.535″ |
| 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 | 77.64 | 151.34 | 209.9 | 263.62 | 295.45 | 313.72 | 320.71 | 324.2 | 327.29 | NA |
| Exhaust Flow @28″ H2O | 107.02 | 160.24 | 194.08 | 211.6 | 218.76 | 224.88 | 230.30 | 233.59 | NA |
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 363+ cubes windsor stroker engines.
These cylinders produce 640+HP on our 408 Windsor combo by 7200 RPM with a solid camshaft and on pump fuel. They would produce over 700 with a solid roller camshaft & more compression.
They also produce over 565HP with a solid flat tappet camshaft by 7200 RPM on pump fuel. ( 363 Cubes )
Heads must be used with a minimum extractor primary pipe size of 1.750″ (1 3/4″)
| 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. |
CNC408W401 | $ 1155 |
| Assembled Cylinder Heads – |
H408W401S | $ 3550 |
| Consists of : | Outright | |
| Valves – New Stainless Steel Intake & Exhaust – Ferrea | ||
| Springs – Dual HP ( ISKY To Suit FlatT Hyd. OR Solid Cams ) | ||
| Retainers – New HP chrome moly retainers | ||
| Valve spring locaters | ||
| Valve Locks – Comp Cams Chrome Moly | ||
| Valve Stem seals – Crane teflon | ||
| 5 Axis CNC Competition Porting – 100% Intake/ Exhaust | ||
| Multiangle Valve Seat Geometry | ||
| Backcut valves | ||
| Valve guides clearance checked & honed if required | ||
| Surface milled to your desired CC’s ( 58 to 68 CC’s ) | ||
| Springs measured & setup to suit cam to be used | ||
| Final washed and assembled | ||
CALL OR EMAIL TO ORDER