WebVR255 CNC Highport 20° Cylinder Heads are the baddest Highport head available for your Small Block Ford. Featuring 255cc Intake Runners for 387+ cfm of flow, 68cc Chambers, … Web30 de nov. de 2010 · I have flowed plenty of factory big block chevy heads, so here it goes. 290 & 049 heads have oval ports. 290s are closed chamber, 049s open chamber. They both flow in similar numbers until .400 lift when the 049 head will flow better at higher lifts because of less valve shrouding. This is especially true when 2.19 intake valves are …
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Web27 de fev. de 2012 · We'll be performing our testing on the Superflow flow bench at Auto Performance Engines, so the numbers you see are real-world flow numbers for popular … Web1 de set. de 2009 · Dart’s Jack McInnis says the single most important thing when choosing your cylinder heads is to be realistic about how the car will be set up and used. “The size of the engine, rpm range, camshaft, type of fuel, weight and gearing all factor in,” says McInnis. “Whether the car will be street driven 99% of the time, or if it will be ... the morning bell
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