50 Engine Bolt Ons Rhs Cnc Ford Heads
RHS CNC Ford Heads: 354 hp at 5,500 rpm, 378 lb-ft at 4,300 rpm
Having already replaced the upper and lower intake and camshaft, the next item on the to-do list was a head swap. We chose a set from Racing Head Service. The Elite CNC heads offered everything the stock heads couldn't, including aluminum construction to reduce weight and massive flow numbers that (according to RHS literature) exceeded 300 cfm at 0.700 lift. Basically the flow rate of these RHS heads was nearly double that of the stockers. The RHS heads were outfitted with valvesprings suitable for our XE274HR cam, meaning they had both sufficient seat and open pressure, not to mention clearance for coil bind. We also took the liberty of checking retainer-to-seal clearance, but we had over 0.150 before contact. The one possible downside to the ported RHS heads was that the combustion chambers were slightly larger than the stock heads (65 cc vs 61 cc) View Related Article
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