The Eastwood Cylinder Head Porting Kit is designed to allow the home mechanic, using little more than a high-speed grinder, to clean, polish, and lightly modify the ports on cylinder heads. It is designed to help get the most out of an existing configuration, not for heavy modification or reshaping of combustion chambers and ports. NOTE: For reshaping ports and valve guide bosses use the carbide burrs listed below. Safety Goggles and Dust Mask must be worn by anyone in the area where you are working. The porting process involves removing metal with a high-speed diegrinder. It is essential that you, and anyone else helping or watching, wear proper safety equipment to avoid injury from any metal particles. Rings, bracelets, watches, etc., should be removed to avoid the possibility of their getting caught on the cylinder head or wrapping around the mandrel on the grinder.Īvoid loose-fitting clothing. Your kit should contain the following items: We also recommend wearing a long-sleeved shirt to protect your forearms from any flying particles. You will also need the cylinder head, intake/exhaust manifold, and carburetor base plate gaskets. Buy a top-end gasket kit and you should have all of them. Internal combustion engines are sophisticated air pumps that pull in an air/fuel mixture, compress it, ignite it, react to the ignition and expel the exhaust fumes. The better an engine pumps air, the more efficiently it will operate. This is one reason why we’ve seen a turn to multi-valve engines in recent years. More valves means more air moving through the engine. More air means greater engine efficiency – both more power and better fuel economy. When you “port” an engine, you remove imperfections and restrictions between the combustion chamber and intake manifold and, therefore, increase air flow. This is done by 1) “smoothing” (or, grinding) the passages in the intake manifold so that they are the same size as the gasket and cylinder head, and 2) removing “rough cast” or “flash” imperfections in the cylinder heads and exhaust manifolds.īe certain that they are not cracked or warped. Cracks can be located with the MagnaFlux Crack Detector. If you have any doubts about their condition, have them checked at a reputable machine shop in your area. Do not attempt to grind-out cracks in the castings. Warped cylinder heads and manifolds should never be re-installed. Remove all carbon from combustion chamber and exhaust ports. “Hot Tanking” is recommended for thorough cleaning. Otherwise, you will not be able to tell if the parts are suitable for porting. Also, the life of abrasive materials will be greatly reduced. GASKET MATCH THE CYLINDER HEAD INTAKE PORTS TO THE INTAKE MANIFOLD Pay particular attention to the exhaust cross-over, which is usually clogged with carbon and will affect engine performance if not cleaned out. This method assures that the cylinder head intake ports match perfectly to the intake manifold port openings. Following your vehicle shop manuals, remove the intake and exhaust valves. Use a spring compressor to avoid damaging the valves during removal.ġ.
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