CNC Ported cyl. Heads
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Chev Heads
| 
SBC RACERPRO 15 DEGREE
COMPETITION CNC PORTED CYLINDER HEADS -280CC
RACERPRO HEADS ARE NO LONGER AVAILABLE, BUT WE CAN STILL CNC PORT YOUR RACERPRO HEADS
| TECHNICAL SPECIFICATIONS : | |
| Intake Valve Diameter: | 2.180" |
| Exhaust Valve Diameter: | 1.625" |
| Intake Port Volume: | 280cc |
| Exhaust Port Volume: | 108cc |
| Chambers CNC Machined | Yes |
| Chamber Volume: | 45-55cc |
| Spark Plugs | Angled |
| Minimum Intake CSA | 3.00" |
| 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 | BOTH LISTED - PIPE USED 2"X 5.000" LONG |
| Intake Gaskets To Use | MG143 |
| VALVE LIFT |
.100" | .200" |
.300" |
.400" |
.500" |
.600" |
.700" |
.800" |
.900" |
1.000" |
| Intake Flow @28" H2O | 78.5 | 170.7 | 228 | 286.7 | 321.3 | 344.6 | 359.5 | 367 | 377 | 383.5 |
| Exhaust Flow @28" H2O W/PIPE | 55.8 | 118.9 | 169.5 | 224.4 | 268.8 | 284.3 | 294 | 300 | 305 | 307.9 |
| Exhaust Flow @28" H2O NO/PIPE | 51.72 | 112.4 | 160.2 | 212.2 | 249.3 | 261.3 | 267.8 | 271.9 | 275.2 | 276.8 |
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 cylinder heads must be used with offset rockers - USE T&D part # 2055 .550" Offset
Offset roller lifters must also be used - Rockers & LIfters in Stock at Pavtek
| 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. |
CNC434S401 | $ 1565 |
| Assembled Cylinder Heads - Suit Solid Roller Camshaft |
H434S404R | $ 4995 |
|
Consists of : |
Outright | |
| RacerPro Raw Castings | ||
| Valves - New Stainless Steel Intake & Exhaust - 2.180" x 1.625" |
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| Springs - Pac Roller Springs ( .850" lift max) |
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| Retainers - New Titanium Retainers ( Manley) |
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| Valve spring locaters |
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| Valve Locks - Comp Cams Chrome Moly 10 Degree |
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| Valve Stem seals - Crane teflon | ||
| 5 Axis CNC Competition Porting - Chambers/ Intake/ Exhaust | ||
| Multiangle Valve Seat Geometry | ||
| Backcut valves |
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| Valve guides clearance checked & honed if required |
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| Surface milled to your desired CC's ( 45 to 55 CC's ) |
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| Springs measured & setup to suit cam to be used | ||
| Final washed and assembled | ||
