CNC Ported cyl. Heads
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Holden Heads
| 
HOLDEN V8 VN CNC
"COMP PORT" CYLINDER HEADS
| TECHNICAL SPECIFICATIONS : | |
| Intake Valve Diameter: | 2.020" |
| Exhaust Valve Diameter: | 1.600" |
| Intake Port Volume: | 178cc |
| Exhaust Port Volume: | 76cc |
| Chambers CNC Machined | No |
| Chamber Volume:Raw | 62cc |
| Spark Plugs | Angled |
| Minimum Intake CSA | 2.465" |
| 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 | YES 1 7/8" |
| VALVE LIFT |
.100" | .200" |
.300" |
.400" |
.500" |
.600" |
.700" |
.800" |
.900" |
1.000" |
| Intake Flow @28" H2O | 63.3 | 148.1 | 194.3 | 232.3 | 259.6 | 279.7 | 293.1 | |||
| Exhaust Flow @28" H2O | 50 | 105.4 | 146 | 171 | 184.6 | 200.3 | 206.5 |
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 355+ cube stroker engines. 7000+ RPM
Heads must be used with a minimum extractor primary pipe size of 1.875" (1 7/8") OD
| Description | Pavtek Part # | Price |
| 5 AXIS CNC PORTING ONLY: | ||
|
5 Axis CNC Competition Porting - Intake/ Exhaust Includes cutting springs pads to suit dual springs ( Isky ) Includes machining of rocker stands to suit screw in studs Does not include cleaning, crack testing, valve guides, milling etc. |
CNC355H401 | $ 1042 |
| Assembled Cylinder Heads - To suit Solid Flat tappet or Street Roller Cam |
H355401S | $ 2782 |
|
Consists of : |
||
| Valves - New Stainless Steel Intake & Exhaust - Ferrea | ||
| Springs - ISKY Dual With Dampner | ||
| Retainers - New HP chrome moly retainers | ||
| Valve spring pads CNC Machined | ||
| 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 | ||
| KLine Valve guides fitted and diamond honed to size | ||
| Surface milled to your desired CC's | ||
| Springs measured & setup to suit cam to be used | ||
| Final washed and assembled | ||
