HIGH STRENGTH CASTINGS: Exclusive casting design adds material 7 places to eliminate cracking, breakage, waviness, and leakage.
CORROSION RESISTANCE: Castings are bead blasted and alodine treated. Then color coded with baked catalyzed coating.
VALVES: 6 C&S High Flow pumping valves, combined with internal porting are proven to deliver twice the fuel flow.
DIAPHRAGM: All other pumping diaphragms are stamped from flat sheet stock. The convoluted (stepped) replacement doesn’t require stretching, eliminating leaks and elongated bolt holes. Less stress to the diaphragm itself means much longer life.
DRIVE SPRING: Single spring replaced with two stainless alloy springs to lower stress and improve reliability.
INTERNAL PUMP ARM: CNC milled from high strength 0-1 tool steel, then hardened and ground. All other brands use stamped low strength steel with no precision milling or grinding.
PUMP ARM BUSHING: Low strength bushing prone to breaking replaced with a A-2 high strength tool steel precision part.
VERTICAL PUMP SHAFT: Premium A-2 air hardening tool steel, Swiss CNC machined, smooth center less ground shaft. Creates an ideal surface for the new double lipped oil seal.
On the pivot end a hardened and ground pin pivots in a precision pocket. Previously two raw stamped steel edges created pivot point. Rough shaft made oil seal prone to leak. Available for SBC, BBC and Dodge. Recommended use with #4505 Alcohol Mechanical Bypass. 4230S-HD will work very well on gas with pressure sensitive bypass #4501. Some type of bypass regulator is required as unregulated pumps make over 17 PSI which will flood the engine if not controlled.