#High flow water pump vs stock series

State-of-the-art turbine flow meters, the coolant flow was measured from both The system effectivelyĭivided the small block cooling system into two separate parts. Using a specially constructed test apparatus, Pink first measured theįlow characteristics from both sides of the engine. Pump along with another aftermarket pump.

Testing the Edelbrock pump was tested against a heavy-duty OEM aluminum racing Pressure, total pump flow, and side-to-side water pump flow balance. Test criteria included cylinder block water Testing Water Pump Design PerformanceĮd Pink Racing Engines put an Edelbrock pump to the test on a 355-inch Chevy Once the stop isĪdjusted against the timing cover, cam thrust movement is minimized.

#High flow water pump vs stock series

Series water pumps incorporate an adjustable cam stop. For maximum strength and reliability on the short-style water pumps, the dual bolt pattern fan-mounting hub is machined from billet steel and is then black oxide coated.Ĭam walk (and the fluctuations in engine timing that go with it), certain Victor

This large bearing diameter means that the shaft can withstand higher torsional loads at high rpm. For increased reliability and strength, Edelbrock uses 3/4-inch diameter ball/roller bearings on many Edelbrock water pumps. Of the long-leg water pump designs incorporate a more conventional cover alongĭurability was also a critical factor in the design of the new series of pumps. Since the short leg pumps are most commonly used for racingĪpplications, they use an O-ring backing plate seal for increased durability. Reduction in shear also comes a reduction in frictional horsepower loss within Shear caused by excessive clearance between the backing plate and impeller. The plate and the backside of the impeller. When theĬlearances are reduced, there’s less room for the water to be pumped between Reduces the clearance between the plate and the back of the impeller. The short-leg pumps use a flat backing plate at the rear of the pump which More equal coolant flow throughout the engine. At high rpm, this produces less cavitation that in turn, allows for Compared to some other pumps, the impeller design found in theĮdelbrock pump flows as much as 20 percent more coolant at a much higher Stamped steel pieces, the iron impeller is considerably stronger (and moreĪccurate). The well-shaped and large cross-sectional passages flow moreĬoolant at a higher velocity, but at a lower rpm.Ĭame up with a large cast iron configuration that is totally CNC machined. To reduce flow losses incurred around the boltīosses in the outlet passages, the internal passages were also reformed with Within existing mounting-bolt spacing, the outlet holes of the pump wereĮnlarged to increase flow. How do manufacturers build a better mousetrap? In the case of Edelbrock (the primary pump we’re featuring here), they determined that the internal pump water passages had to be built with equal volume and a unidirectional shape. On the surface, all water pumps look the same. Average hot rod (street machine, etc.), a mechanical belt-driven water pump isīut all mechanical water pumps are not created equal, particularly if high performance is the goal.