Edelbrock 60435 Performer RPM High Compression 454 O-Port Cylinder Heads for Big Block Chevy
350-60435
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Performer RPM High Compression Aluminum Cylinder Heads - Oval Port
Designed for big-block Chevy 396-502 c.i.d. engines, these oval port heads feature 100cc semi-open combustion chambers created by angle milling at a 1.5 degree angle to improve intake port alignment and create a smaller chamber without valve shrouding. Using stock flat top style pistons they create an ideal street compression ratio of 9.2:1 without the need to purchase aftermarket domed pistons. A totally unique intake port design yields flow numbers traditionally associated with high performance rectangular port heads, but with the smaller runner size and velocity of an oval port for excellent seat-of-the-pants performance and crisp throttle response. The stainless steel 2.19'' intake and 1.88'' exhaust valves have smaller-than-stock 11/32'' valve stems to promote excellent flow and lighter valve weight. The deck surface and water jackets were specially designed to work with all big-block Chevrolet engine blocks. The heat crossover passage is present, but has been blocked, making these heads not legal for use on emissions controlled engines. Heads include top-quality ARP rocker studs, bronze guides and hardened, ductile iron valve seats.
Tech Tip: To gain more spark plug clearance, Edelbrock recommends using Champion RC Series plugs such as the RC12YC (P/N 192-49776). They are 0.230'' shorter than a conventional spark plug and have a 5/8'' hex for easier access.| Combustion Chamber Volume: | 100cc |
| Intake Runner Volume: | 290cc |
| Exhaust Runner Volume: | 110cc |
| Intake Valve Diameter: | 2.19'' |
| Exhaust Valve Diameter: | 1.88'' |
| Valve Stem Diameter: | 11/32'' |
| Valve Guides: | Manganese Bronze |
| Deck Thickness: | 9/16'' |
| Valve Spring Diameter: | 1.55'' |
| Valve Spring Maximum Lift: | 0.700'' |
| Rocker Stud: | 7/16'' |
| Guideplate: | Hardened Steel 3/8'' |
| Pushrod Diameter: | 3/8'' |
| Valve Angle: | 26° |
| Exhaust Port Location: | Stock |
| Spark Plug Fitment: | 14mm x 3/4'' Reach, Gasket Seat |
| Valve Lift | Intake | Exhaust |
| .100'' | 73 | 71 |
| .200'' | 143 | 128 |
| .300'' | 207 | 153 |
| .400'' | 251 | 178 |
| .500'' | 284 | 200 |
| .600'' | 299 | 218 |
| .700'' | N/A | N/A |
| Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28'' H2O | ||
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
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Specifications:
Will most aftermarket intake manifolds fit without being angle milled, as these heads are angle milled 1.5°
It been a while since I purchased HP HEADS. ARE THE PRICES LISTED AS 2 HEAD/PAIR OR SINGLE HEAS?
Will these heads fit on a gen v 454 chevy
From what year to what year of chevy big block 454 will these efelbrock 60435 heads fit on
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